Official Paper

RRB JE ECE 22 Apr 2025 Shift 2 CBT 2 Official Paper (Previous Year Paper)

150 questions · 120 minutes · with answers · free

Attempt as Timed Mock Test

General Abilities (50 questions)

1

The people of ___________ were famously involved in execution of the Chipko movement.

  1. ((a))

    Gujarat

  2. ((b))

    Delhi

  3. ((c))

    Garhwal Himalayas

  4. ((d))

    Assam

Show Answer
Answer: ((a))

Gujarat

2

Why do covalent compounds generally have low melting and boiling points?

  1. ((a))

    They contain metallic bonds. 

  2. ((b))

    They have strong electrostatic forces. 

  3. ((c))

    They have a rigid lattice structure.

  4. ((d))

    They have weak intermolecular forces.

Show Answer
Answer: ((a))

They contain metallic bonds. 

3

Which of the following elements has an atomic number of 8?

  1. ((a))

    Hydrogen

  2. ((b))

    Nitrogen

  3. ((c))

    Carbon

  4. ((d))

    Oxygen

Show Answer
Answer: ((a))

Hydrogen

4

In an aquatic ecosystem, the phenomenon of biomagnification can best be studied in the case of _________.

  1. ((a))

    phosphates

  2. ((b))

    chlorine

  3. ((c))

    organochlorine

  4. ((d))

    DDT

Show Answer
Answer: ((a))

phosphates

5

Which function key is used to move text or graphics in a document? 

  1. ((a))

    F2

  2. ((b))

    F1

  3. ((c))

    F12

  4. ((d))

    F5

Show Answer
Answer: ((a))

F2

6

A ball of mass 50 grams is moving with a velocity of 15 m/s. What is its kinetic energy?

  1. ((a))

    3.750 J

  2. ((b))

    1.875 J

  3. ((c))

    5.625 J

  4. ((d))

    7.500 J

Show Answer
Answer: ((a))

3.750 J

7

In January 2025, India launched the NVS-02 satellite to strengthen which of the following navigation systems?

  1. ((a))

    Galileo

  2. ((b))

    Global Positioning System (GPS) 

  3. ((c))

    Navigation with Indian Constellation (NavIC)

  4. ((d))

    Global Navigation Satellite System (GLONASS)

Show Answer
Answer: ((a))

Galileo

8

Which of the following options is NOT a greenhouse gas?

  1. ((a))

    Methane

  2. ((b))

    Carbon tetrachloride

  3. ((c))

    Nitrous oxide

  4. ((d))

    Carbon dioxide

Show Answer
Answer: ((a))

Methane

9

The main reason for which we are dependent on air is our _____.

  1. ((a))

    osmoregulation

  2. ((b))

    excretion

  3. ((c))

    digestion

  4. ((d))

    respiration 

Show Answer
Answer: ((a))

osmoregulation

10

Which of the following was NOT an artisan guild during the Mauryan period?

మౌర్య కాలంలో ఈ క్రింది వాటిలో ఏది కళాకారుల సంఘం (artisan guild) కాదు?

  1. ((a))

    Astrologer / జ్యోతిష్యుడు

  2. ((b))

    Potters / కుమ్మరులు

  3. ((c))

    Carpenters / వడ్రంగులు

  4. ((d))

    Bankers and Merchants / బ్యాంకర్లు మరియు వ్యాపారులు

Show Answer
Answer: ((a))

Astrologer / జ్యోతిష్యుడు

11

Who among the following referred to the Directive Principles as the 'life-giving provisions' of the Constitution of India?

  1. ((a))

    Ivor Jennings

  2. ((b))

    BR Ambedkar

  3. ((c))

    HM Seervai

  4. ((d))

    LM Singhvi

Show Answer
Answer: ((a))

Ivor Jennings

12

What is the primary function of a firewall tool in a computer network?

  1. ((a))

    To speed up internet connections

  2. ((b))

    To monitor and control incoming and outgoing network traffic

  3. ((c))

    To store data securely

  4. ((d))

    To detect and remove viruses

Show Answer
Answer: ((a))

To speed up internet connections

13

The President has the power to dissolve which house of Parliament? 

  1. ((a))

    Lok Sabha only 

  2. ((b))

    Legislative Assembly

  3. ((c))

    Both Rajya Sabha and Lok Sabha

  4. ((d))

    Rajya Sabha only

Show Answer
Answer: ((a))

Lok Sabha only 

14

Who among the following developed the notation system for Hindustani classical music?

  1. ((a))

    Pandit Ravi Shankar

  2. ((b))

    Pandit Vishnu Narayan Bhatkhande

  3. ((c))

    Ustad Bismillah Khan

  4. ((d))

    Ustad Amjad Ali Khan

Show Answer
Answer: ((a))

Pandit Ravi Shankar

15

Which of the following MS Excel functions is used to convert a numeric value into a text with a specific format?

  1. ((a))

    NUMBERTOTEXT()

  2. ((b))

    VALUE()

  3. ((c))

    FORMAT()

  4. ((d))

    TEXT()

Show Answer
Answer: ((a))

NUMBERTOTEXT()

16

In which of the following events did Deepthi Jeevanji set a world record at the 2024 World Para Athletics Championships? 

  1. ((a))

    400 metres T20

  2. ((b))

    200 metres T20

  3. ((c))

    100 metres T20

  4. ((d))

    600 metres T20

Show Answer
Answer: ((a))

400 metres T20

17

A solution is prepared by dissolving 40 g of NaCl in 200 g of water. What is the mass per cent of NaCl in the solution? 

  1. ((a))

    45%

  2. ((b))

    16.67%

  3. ((c))

    20%

  4. ((d))

    25%

Show Answer
Answer: ((a))

45%

18

For the protection and improvement of the environmental quality, the Environment Protection Act came into force in the year _________.

  1. ((a))

    1984

  2. ((b))

    1992

  3. ((c))

    1986

  4. ((d))

    1972

Show Answer
Answer: ((a))

1984

19

Who among the following Indian female cricketers won the Best International Cricketer Award (Women) at the BCCI Naman Awards 2025?

  1. ((a))

    Smriti Mandhana

  2. ((b))

    Mithali Raj 

  3. ((c))

    Harmanpreet Kaur

  4. ((d))

    Jhulan Goswami 

Show Answer
Answer: ((a))

Smriti Mandhana

20

A concave lens has a focal length of −2 cm. What is its power?

  1. ((a))

    25 D

  2. ((b))

    −50 D

  3. ((c))

    −0.5 D

  4. ((d))

    0.5 D

Show Answer
Answer: ((a))

25 D

21

What does LAN stand for?

  1. ((a))

    Local Area Network

  2. ((b))

    Large Area Network

  3. ((c))

    Limited Access Node

  4. ((d))

    Linked Access Network

Show Answer
Answer: ((a))

Local Area Network

22

Radiations that are emitted from nuclear wastes are known to cause ________ at a high rate.

  1. ((a))

    diseases

  2. ((b))

    emotional defects

  3. ((c))

    mutations

  4. ((d))

    syndromes

Show Answer
Answer: ((a))

diseases

23

Which country proposed the idea of holding a United Nations conference on human interactions with the environment in 1968?

  1. ((a))

    United States

  2. ((b))

    Canada

  3. ((c))

    France

  4. ((d))

    Sweden

Show Answer
Answer: ((a))

United States

24

Which formula should be entered in cell C2 to multiply the values of cells A2 and B2 in Excel?

  1. ((a))

    =A2+B2

  2. ((b))

    =MULTIPLY(A2,B2)

  3. ((c))

    =A2*B2

  4. ((d))

    =A2-B2

Show Answer
Answer: ((a))

=A2+B2

25

An object is placed 15 cm in front of a convex lens of focal length 25 cm. The image distance will be ______. 

  1. ((a))

    −37.5 cm

  2. ((b))

    −10.0 cm

  3. ((c))

    −9.37 cm

  4. ((d))

    17.5 cm

Show Answer
Answer: ((a))

−37.5 cm

26

Due to global warming, the temperature of the earth has increased by ________

  1. ((a))

    0.8°C

  2. ((b))

    0.7°C

  3. ((c))

    0.6°C 

  4. ((d))

    0.5°C

Show Answer
Answer: ((a))

0.8°C

27

An alloy is considered a homogeneous mixture because:

  1. ((a))

    it contains two or more phases

  2. ((b))

    it exhibits uniform composition throughout

  3. ((c))

    its components can be separated by filtration

  4. ((d))

    its components are chemically combined in fixed proportions 

Show Answer
Answer: ((a))

it contains two or more phases

28

Which of the following is NOT toxic to non-target organisms in the soil?

  1. ((a))

    Organic fertilisers

  2. ((b))

    Fungicides

  3. ((c))

    Herbicides 

  4. ((d))

    Pesticides

Show Answer
Answer: ((a))

Organic fertilisers

29

Which of the following bridges is constructed over the Brahmaputra River in India?

  1. ((a))

    Dhola-Sadiya Bridge

  2. ((b))

    Howrah Bridge

  3. ((c))

    Mahatma Gandhi Setu

  4. ((d))

    Pamban Bridge

Show Answer
Answer: ((a))

Dhola-Sadiya Bridge

30

Which German optical technology firm inaugurated its first Global Capability Centre in Bengaluru in November 2024, with plans to double its workforce within three years? 

  1. ((a))

    Jenoptik 

  2. ((b))

    Leica

  3. ((c))

    Schneider Kreuznach

  4. ((d))

    Carl Zeiss AG

Show Answer
Answer: ((a))

Jenoptik 

31

The kinetic energy of an object is derived using which of the following equations of motion?

  1. ((a))

    a = (v – u) / t

  2. ((b))

    s = ut + ½ at2

  3. ((c))

    v = u + at

  4. ((d))

    v2 – u2 = 2as

Show Answer
Answer: ((a))

a = (v – u) / t

32

What happens to the pH of pure water when a few drops of lemon juice are added?

  1. ((a))

    The pH increases 

  2. ((b))

    The pH remains the same

  3. ((c))

    The pH becomes neutral 

  4. ((d))

    The pH decreases 

Show Answer
Answer: ((a))

The pH increases 

33

Which of the following correctly differentiates mixtures and compounds?

FeatureMixtureCompound
A) SeparationCan be separated by physical methodsRequires chemical methods
B) CompositionFixed ratioVariable ratio
C) PropertiesAlways the same as constituentsDifferent from constituents
D) FormationBy chemical reactionBy simple mixing
  1. ((a))

    Option A (Separation) is correct 

  2. ((b))

    Option D (Formation) is correct

  3. ((c))

    Option B (Composition) is correct

  4. ((d))

    Option C (Properties) is correct 

Show Answer
Answer: ((a))

Option A (Separation) is correct 

34

What is the general orientation of the Himalayan ranges in the northwestern part of India?

  1. ((a))

    East-South

  2. ((b))

    Northeast to Southwest

  3. ((c))

    South-North

  4. ((d))

    Northwest to Southeast 

Show Answer
Answer: ((a))

East-South

35

What is the primary function of a computer firewall?

  1. ((a))

    To speed up internet connectivity

  2. ((b))

    To prevent unauthorised access to a private network

  3. ((c))

    To detect and remove computer viruses

  4. ((d))

    To store user passwords securely

Show Answer
Answer: ((a))

To speed up internet connectivity

36

Which operating system is known for its open-source nature and community-driven development for desktops and laptops?

  1. ((a))

    iOS

  2. ((b))

    macOS

  3. ((c))

    Windows

  4. ((d))

    Linux

Show Answer
Answer: ((a))

iOS

37

Which type of RAM is faster and DOES NOT require refreshing? 

  1. ((a))

    SRAM

  2. ((b))

    Dynamic Random Access Memory

  3. ((c))

    Flash Memory

  4. ((d))

    ROM

Show Answer
Answer: ((a))

SRAM

38

A sound wave with a low frequency will have _______.

  1. ((a))

    a low amplitude

  2. ((b))

    a short wavelength 

  3. ((c))

    a high pitch

  4. ((d))

    a low pitch

Show Answer
Answer: ((a))

a low amplitude

39

The power to issue an ordinance when Parliament is NOT in session is given to the President under which Article?

  1. ((a))

    Article 72

  2. ((b))

    Article 110

  3. ((c))

    Article 123

  4. ((d))

    Article 356

Show Answer
Answer: ((a))

Article 72

40

A metal wire is stretched, but it does not break easily. This property is known as:

  1. ((a))

    hardness

  2. ((b))

    ductility

  3. ((c))

    malleability

  4. ((d))

    brittleness

Show Answer
Answer: ((a))

hardness

41

The atomic mass of sulphur is 32 u, and sulphur exists as S₈ molecules. What is the molecular mass of sulphur? 

  1. ((a))

    256 u

  2. ((b))

    32 u

  3. ((c))

    64 u

  4. ((d))

    128 u

Show Answer
Answer: ((a))

256 u

42

Where can one find the option to change a PowerPoint template?

  1. ((a))

    View → Slide Master

  2. ((b))

    Insert → Themes

  3. ((c))

    Design → Themes

  4. ((d))

    Home → Layout 

Show Answer
Answer: ((a))

View → Slide Master

43

Who is known as the leader of the Green Revolution in India?

  1. ((a))

    C Subramaniam

  2. ((b))

    Prof. MS Swaminathan

  3. ((c))

    Dr. Rajendra Prasad

  4. ((d))

    Tribhuvandas Kishibhai Patel

Show Answer
Answer: ((a))

C Subramaniam

44

Which of the following is NOT a source of collection of municipal solid waste?

  1. ((a))

    Waste from homes

  2. ((b))

    Radioactive waste

  3. ((c))

    Waste from hospitals

  4. ((d))

    Waste from schools

Show Answer
Answer: ((a))

Waste from homes

45

Electricity production is categorised under which of the following economic sectors?

  1. ((a))

    Primary sector

  2. ((b))

    Secondary sector

  3. ((c))

    Tertiary sector

  4. ((d))

    Quaternary sector 

Show Answer
Answer: ((a))

Primary sector

46

Who among the following established the Bengal Chemical Swadeshi Stores?

  1. ((a))

    Dadabhai Naoroji

  2. ((b))

    Surendranath Banerjee

  3. ((c))

    BG Tilak

  4. ((d))

    Acharya PC Ray

Show Answer
Answer: ((a))

Dadabhai Naoroji

47

The wavelength of ultraviolet radiations which is most powerful and causes damage to the DNA is _____. 

  1. ((a))

    UV-C

  2. ((b))

    UV-B

  3. ((c))

    UV-D

  4. ((d))

    UV-A

Show Answer
Answer: ((a))

UV-C

48

What happens when you click on the 'Forward' button in an email?

  1. ((a))

    A blank email opens.

  2. ((b))

    The original message is copied into a new email draft. 

  3. ((c))

    The email is permanently deleted. 

  4. ((d))

    The email is automatically sent to all contacts. 

Show Answer
Answer: ((a))

A blank email opens.

49

Which of the following will increase the heat produced by a heating element?

  1. ((a))

    Using a material with high conductivity

  2. ((b))

    Decreasing the applied voltage

  3. ((c))

    Using a wire of lower resistance

  4. ((d))

    Increasing the current flowing through the wire 

Show Answer
Answer: ((a))

Using a material with high conductivity

50

A car moving at a constant speed of 123 km/hr along a straight road is an example of ________.

  1. ((a))

    uniform motion 

  2. ((b))

    rotational motion

  3. ((c))

    random motion

  4. ((d))

    non-uniform motion

Show Answer
Answer: ((a))

uniform motion 

Technical Abilities (100 questions)

51

In the 8085 microprocessor, when RD signal is low and IO/M signal is high, the instruction is in the _______ cycle of execution.

  1. ((a))

    I/O write

  2. ((b))

    memory write

  3. ((c))

    I/O read

  4. ((d))

    memory read

Show Answer
Answer: ((a))

I/O write

52

In the communication of the PPM method, the information is encoded in the:

  1. ((a))

    position of the pulse

  2. ((b))

    power of the pulse

  3. ((c))

    amplitude of the pulse

  4. ((d))

    width of the pulse

Show Answer
Answer: ((a))

position of the pulse

53

Which of the following switching techniques breaks data into small packets that are transmitted independently over the network?

  1. ((a))

    Circuit Switching

  2. ((b))

    Message Switching

  3. ((c))

    Token Switching

  4. ((d))

    Packet Switching

Show Answer
Answer: ((a))

Circuit Switching

54

For a bipolar junction transistor (BJT) working as an amplifier, which of the following options is INCORRECT?

  1. ((a))

    For the emitter junction of a PNP transistor, the P-terminal is connected to positive voltage, and the N-terminal is connected to negative voltage.

  2. ((b))

    For the collector junction of an NPN transistor, the P-terminal is connected to positive voltage, and the N-terminal is connected to negative voltage.

  3. ((c))

    For the emitter junction of an NPN transistor, the P-terminal is connected to positive voltage, and the N-terminal is connected to negative voltage.

  4. ((d))

    For the collector junction of a PNP transistor, the N-terminal is connected to positive voltage, and the P-terminal is connected to negative voltage.

Show Answer
Answer: ((a))

For the emitter junction of a PNP transistor, the P-terminal is connected to positive voltage, and the N-terminal is connected to negative voltage.

55

In a non-inverting op-amp, if the feedback resistance is 20 KΩ and resistance between input and inverting terminal is 4 KΩ, the value of voltage gain is _______.

  1. ((a))

    0.2

  2. ((b))

    1.2

  3. ((c))

    5

  4. ((d))

    6

Show Answer
Answer: ((a))

0.2

56

Which of the following describes the effect of hardening in conducting materials such as copper and aluminium?

  1. ((a))

    It increases ductility and reduces resistance.

  2. ((b))

    It reduces electrical conductivity and increases brittleness.

  3. ((c))

    It has no effect on the material's electrical properties.

  4. ((d))

    It increases hardness and tensile strength, but reduces ductility.

Show Answer
Answer: ((a))

It increases ductility and reduces resistance.

57

In 8051 microcontroller, Special Function Registers can be addressed using addresses from _______.

  1. ((a))

    00h - 7Fh

  2. ((b))

    80h - FFh

  3. ((c))

    F0h - FFh

  4. ((d))

    20h - 2Fh

Show Answer
Answer: ((a))

00h - 7Fh

58

The roll-off factor (β:beta) in raised cosine filter represents the ratio of:

  1. ((a))

    excess power of system to the minimum Nyquist bandwidth

  2. ((b))

    additional bandwidth to total system bandwidth

  3. ((c))

    total available bandwidth to the Nyquist bandwidth

  4. ((d))

    excess bandwidth to the Nyquist bandwidth

Show Answer
Answer: ((a))

excess power of system to the minimum Nyquist bandwidth

59

The IC 723 is primarily used as a ________.

  1. ((a))

    clamper

  2. ((b))

    clipper

  3. ((c))

    rectifier

  4. ((d))

    voltage regulator

Show Answer
Answer: ((a))

clamper

60

In Frequency Shift Keying (FSK) modulation, the carrier frequency is switched between two frequencies based on _______.

  1. ((a))

    amplitude variation

  2. ((b))

    whether a binary 1 or 0 is sent

  3. ((c))

    phase variation

  4. ((d))

    frequency variation

Show Answer
Answer: ((a))

amplitude variation

61

Which of the following statements is INCORRECT for a common-emitter (CE) BJT amplifier

  1. ((a))

    The CE amplifier cannot be used as a small signal amplifier.

  2. ((b))

    The input characteristics are drawn between input current (IB​) and input voltage (VBE​) at constant VCE​.

  3. ((c))

    It has the moderate input impedance and moderate output impedance.

  4. ((d))

    The output characteristics are drawn between output current (IC​) and output voltage (VCE​) at constant input current.

Show Answer
Answer: ((a))

The CE amplifier cannot be used as a small signal amplifier.

62

What is the limitation of the conditional operator (? :) in C?

  1. ((a))

    It cannot be nested.

  2. ((b))

    It can only be used with integer values.

  3. ((c))

    It allows only one statement after ? and :.

  4. ((d))

    It cannot be used inside a loop.

Show Answer
Answer: ((a))

It cannot be nested.

63

Why does magnetic fringing occur at the ends of a magnetic circuit?

  1. ((a))

    The magnetic poles are not well-defined.

  2. ((b))

    The reluctance of the material increases.

  3. ((c))

    The MMF is not constant.

  4. ((d))

    The magnetic field lines spread out and become weaker.

Show Answer
Answer: ((a))

The magnetic poles are not well-defined.

64

A half-wave rectifier is designed using a diode and a resistor. The diode will burn out if it remains ON for more than 10 μs. What is the minimum input frequency required for safe operation?

  1. ((a))

    1 MHz

  2. ((b))

    20 kHz

  3. ((c))

    100 kHz

  4. ((d))

    50 kHz

Show Answer
Answer: ((a))

1 MHz

65

In a magnetic circuit, the total magnetic flux is 2 Wb (Weber). The reluctance of the magnetic circuit is 5 AT/Wb. What is the magnetomotive force (MMF) required to establish this flux?

  1. ((a))

    14 A

  2. ((b))

    10 AT

  3. ((c))

    12 A

  4. ((d))

    1 A

Show Answer
Answer: ((a))

14 A

66

Which of the following devices operates at the Data Link Layer of the OSI model?

  1. ((a))

    Switch

  2. ((b))

    Modem

  3. ((c))

    Firewall

  4. ((d))

    Router

Show Answer
Answer: ((a))

Switch

67

The ternary operator can be used as a replacement for which loop/statement?

  1. ((a))

    If-else statement

  2. ((b))

    For loop

  3. ((c))

    While loop

  4. ((d))

    Switch-case statement

Show Answer
Answer: ((a))

If-else statement

68

In an electrical circuit, there are two resistors (R1 = 5 Ω and R2 = 10 Ω) connected in series with a 15 V battery. What is the voltage drop across R2, according to Kirchhoff’s Voltage Law (KVL)?

  1. ((a))

    5 V

  2. ((b))

    15 V

  3. ((c))

    0 V

  4. ((d))

    10 V

Show Answer
Answer: ((a))

5 V

69

A BJT is configured as a common-base amplifier; which of the following statements is INCORRECT?

  1. ((a))

    It is suitable for high-frequency applications.

  2. ((b))

    The voltage gain in a CB configuration is very high.

  3. ((c))

    The CB configuration operates as an amplifier when the transistor is in the saturation region.

  4. ((d))

    It works as an off switch if both junctions are reverse biased.

Show Answer
Answer: ((a))

It is suitable for high-frequency applications.

70

Which of the following is a characteristic of diamagnetic materials when placed in a magnetic field?

  1. ((a))

    They are strongly magnetised in the same direction as the applied magnetic field.

  2. ((b))

    They exhibit no effect in a magnetic field.

  3. ((c))

    They exhibit weak repulsion from the magnetic field and align in the opposite direction.

  4. ((d))

    They exhibit a strong attraction to the magnetic field.

Show Answer
Answer: ((a))

They are strongly magnetised in the same direction as the applied magnetic field.

71

Which of the following is a major application of carbon in electrical engineering?

  1. ((a))

    Semiconductor components in circuits

  2. ((b))

    Electrical contacts and brushes in motors

  3. ((c))

    Conducting wires for power transmission

  4. ((d))

    Insulating material for high-voltage cables

Show Answer
Answer: ((a))

Semiconductor components in circuits

72

The address range of the bit addressable memory area in the 8051 microcontroller is ______.

  1. ((a))

    00-FFh

  2. ((b))

    00-7Fh

  3. ((c))

    20-2Fh

  4. ((d))

    20-7Fh

Show Answer
Answer: ((a))

00-FFh

73

Which SNMP component resides on the network device being monitored?

  1. ((a))

    Protocol Analyzer

  2. ((b))

    SNMP Agent

  3. ((c))

    MIB Server

  4. ((d))

    SNMP Manager

Show Answer
Answer: ((a))

Protocol Analyzer

74

Capture range frequency of a PLL _______.

  1. ((a))

    is inversely proportional to the square root value of capacitance

  2. ((b))

    is directly proportional to the value of capacitance

  3. ((c))

    is inversely proportional to the value of capacitance

  4. ((d))

    does not depend on the value of capacitance

Show Answer
Answer: ((a))

is inversely proportional to the square root value of capacitance

75

What does DSB-SC stand for in communication system engineering?

  1. ((a))

    Double Sideband with Single Carrier

  2. ((b))

    Double Sideband Suppressed Carrier

  3. ((c))

    Dual Sideband with Single Carrier

  4. ((d))

    Dependent Sideband Suppressed Carrier

Show Answer
Answer: ((a))

Double Sideband with Single Carrier

76

The Port ______ in the 8051 microcontroller has no dual functions.

  1. ((a))

    1

  2. ((b))

    2

  3. ((c))

    3

  4. ((d))

    0

Show Answer
Answer: ((a))

1

77

Which of the following functions is used to find the length of a string in C?

  1. ((a))

    sizeof()

  2. ((b))

    strlen()

  3. ((c))

    length()

  4. ((d))

    strlength()

Show Answer
Answer: ((a))

sizeof()

78

Why is a delay line used in an oscilloscope?

  1. ((a))

    To reduce noise in the signal

  2. ((b))

    To enhance signal resolution

  3. ((c))

    To increase signal amplitude

  4. ((d))

    To synchronise the input signal with the electron beam

Show Answer
Answer: ((a))

To reduce noise in the signal

79

What does the 'D' in DRAM stand for?

  1. ((a))

    Dynamic

  2. ((b))

    Direct

  3. ((c))

    Data

  4. ((d))

    Digital

Show Answer
Answer: ((a))

Dynamic

80

In a PNP transistor, when the emitter junction is forward biased and the collector junction is reverse biased, which of the following statements is correct?

  1. ((a))

    In a PNP transistor, current mainly flows due to electrons in the N-type base.

  2. ((b))

    The depletion width of the N-type base is smaller than that of the P-type collector.

  3. ((c))

    The collector current is the sum of the majority and minority currents.

  4. ((d))

    The depletion region of the emitter junction increases as the applied voltage increases.

Show Answer
Answer: ((a))

In a PNP transistor, current mainly flows due to electrons in the N-type base.

81

What is a primary application of VSB (Vestigial Sideband) modulation?

  1. ((a))

    Telephonic communication

  2. ((b))

    Television signal transmission

  3. ((c))

    FM radio broadcasting

  4. ((d))

    Satellite communication

Show Answer
Answer: ((a))

Telephonic communication

82

How many select lines are required for a 1-to-8 Demultiplexer?

  1. ((a))

    4

  2. ((b))

    1

  3. ((c))

    2

  4. ((d))

    3

Show Answer
Answer: ((a))

4

83

The following block diagram represents which type of signal generation in

communication?

  1. ((a))

    PWM

  2. ((b))

    PAM

  3. ((c))

    PCM

  4. ((d))

    PPM

Show Answer
Answer: ((a))

PWM

84

In a multiple trace oscilloscope, the display of two signals is achieved by:

  1. ((a))

    using multiple phosphor screens

  2. ((b))

    using a digital display panel

  3. ((c))

    using two electron guns

  4. ((d))

    using a single electron gun with alternating sweeps

Show Answer
Answer: ((a))

using multiple phosphor screens

85

Which of the following statements is FALSE for a negative feedback amplifier?

  1. ((a))

    It reduces nonlinear distortion in the output of the circuit.

  2. ((b))

    It reduces the effect of temperature on the output.

  3. ((c))

    It reduces unwanted electrical signals at the output generated in the circuit.

  4. ((d))

    It reduces the bandwidth of the amplifier.

Show Answer
Answer: ((a))

It reduces nonlinear distortion in the output of the circuit.

86

Which of the following is a characteristic of a primary cell?

  1. ((a))

    Once discharged, it cannot be reused.

  2. ((b))

    It can be recharged multiple times.

  3. ((c))

    It is used in rechargeable applications.

  4. ((d))

    It has a longer shelf life compared to secondary cells.

Show Answer
Answer: ((a))

Once discharged, it cannot be reused.

87

What is the primary function of a voltage differential relay in an electrical protection system?

  1. ((a))

    It detects phase angle differences between the currents and trips the system if the angle exceeds a set limit.

  2. ((b))

    It measures the impedance across the circuit and operates when a fault is detected.

  3. ((c))

    It compares the current entering and leaving the protected zone to detect faults.

  4. ((d))

    It detects the difference in voltage between two or more points and trips the system if the voltage difference exceeds a set threshold.

Show Answer
Answer: ((a))

It detects phase angle differences between the currents and trips the system if the angle exceeds a set limit.

88

How many clock pulses are required to load n bits into an n-bit SIPO shift register?

  1. ((a))

    n2

  2. ((b))

    2n

  3. ((c))

    n

  4. ((d))

    2n

Show Answer
Answer: ((a))

n2

89

What is the hexadecimal equivalent of the binary number 110101?

  1. ((a))

    2B

  2. ((b))

    38

  3. ((c))

    6A

  4. ((d))

    35

Show Answer
Answer: ((a))

2B

90

Thermistors are favoured over other temperature transducers because they _____.

  1. ((a))

    have a fast response time and high sensitivity

  2. ((b))

    are highly linear over a wide range

  3. ((c))

    have a wide temperature range

  4. ((d))

    are not affected by environmental conditions

Show Answer
Answer: ((a))

have a fast response time and high sensitivity

91

What is the difference between edge-triggering and level-triggering?

  1. ((a))

    Edge-triggering responds to the transition of the clock, while level-triggering responds to the level of the clock.

  2. ((b))

    Edge-triggering requires more power than level-triggering.

  3. ((c))

    Edge-triggering is faster than level-triggering.

  4. ((d))

    Edge-triggering responds to the level of the input, while level-triggering responds to the transition.

Show Answer
Answer: ((a))

Edge-triggering responds to the transition of the clock, while level-triggering responds to the level of the clock.

92

What is a 'memory bank' in RAM organisation?

  1. ((a))

    A cache memory location

  2. ((b))

    A group of memory cells arranged in a single row

  3. ((c))

    A section of memory reserved for the operating system

  4. ((d))

    An independent memory module that can be accessed concurrently

Show Answer
Answer: ((a))

A cache memory location

93

Which topology is most suitable for small networks or temporary setups?

  1. ((a))

    Star topology

  2. ((b))

    Ring topology

  3. ((c))

    Mesh topology

  4. ((d))

    Bus topology

Show Answer
Answer: ((a))

Star topology

94

A practical silicon diode with a cut-in voltage of 0.7 V is connected as

follows:

P-terminal (anode) → Ground (0V)

N-terminal (cathode) → +10V

Given that the current flowing through the diode is 1 μA, what is the DC

resistance in reverse biased diode?

  1. ((a))

    10.7 MΩ

  2. ((b))

    −9.30 MΩ

  3. ((c))

    9.30 MΩ

  4. ((d))

    10 MΩ

Show Answer
Answer: ((a))

10.7 MΩ

95

In PLL as frequency synthesizer, if the crystal oscillator having frequency 500 MHz is passed through divide by 2 network, then the input frequency to PLL is _______ MHz.

  1. ((a))

    1000

  2. ((b))

    250

  3. ((c))

    1500

  4. ((d))

    0.004

Show Answer
Answer: ((a))

1000

96

Which of the following is true about microwaves in unguided media?

  1. ((a))

    They are slower than radio waves.

  2. ((b))

    They require line-of-sight transmission.

  3. ((c))

    They are not affected by obstacles like buildings or hills.

  4. ((d))

    They use fiber optics for data transmission.

Show Answer
Answer: ((a))

They are slower than radio waves.

97

What is the purpose of the sizeof operator in C?

  1. ((a))

    To allocate memory at compile time

  2. ((b))

    To allocate memory dynamically

  3. ((c))

    To determine the size of a data type or variable in bytes

  4. ((d))

    To determine the size of a data type or variable in bits

Show Answer
Answer: ((a))

To allocate memory at compile time

98

In a CRT oscilloscope, the horizontal deflection plates are used to:

  1. ((a))

    focus the beam on the phosphor screen

  2. ((b))

    create a sweeping movement of the beam from left to right

  3. ((c))

    control the electron gun

  4. ((d))

    display the vertical signal

Show Answer
Answer: ((a))

focus the beam on the phosphor screen

99

Which of the following instruments typically has the highest resolution?

  1. ((a))

    Digital multimeter

  2. ((b))

    Oscilloscope

  3. ((c))

    Digital thermometer

  4. ((d))

    Analog voltmeter

Show Answer
Answer: ((a))

Digital multimeter

100

The time delay in an oscilloscope can be measured by:

  1. ((a))

    measuring the time between two successive peaks of the signal

  2. ((b))

    measuring the amplitude of the signal

  3. ((c))

    counting the number of weak signals

  4. ((d))

    measuring the decibel of the signal

Show Answer
Answer: ((a))

measuring the time between two successive peaks of the signal

101

Why is shielding used in oscilloscope probes?

  1. ((a))

    To control the electron beam in the oscilloscope

  2. ((b))

    To reduce external electromagnetic interference

  3. ((c))

    To increase the probe’s sensitivity

  4. ((d))

    To amplify weak signals

Show Answer
Answer: ((a))

To control the electron beam in the oscilloscope

102

Selectivity in a protection relay system refers to:

  1. ((a))

    the ability of the relay to operate only for specific fault types

  2. ((b))

    the ability of the relay to discriminate between fault and normal conditions

  3. ((c))

    the ability of the relay to clear faults without affecting the rest of the system

  4. ((d))

    the ability of the relay to operate with a minimal time delay for all fault conditions

Show Answer
Answer: ((a))

the ability of the relay to operate only for specific fault types

103

Which of the following statements about FM detection using PLL circuit are correct?

S1: At the error amplifier output, we get demodulated FM output.

S2: FM signal is applied to the input of the PLL.

  1. ((a))

    Only S1

  2. ((b))

    Neither S1 nor S2

  3. ((c))

    Only S2

  4. ((d))

    Both S1 and S2

Show Answer
Answer: ((a))

Only S1

104

What is a key difference between a modem and a network interface card (NIC)?

  1. ((a))

    A modem provides internet access, while a NIC manages local area network (LAN) traffic.

  2. ((b))

    A NIC connects to wireless networks, while a modem only supports wired connections.

  3. ((c))

    A NIC is used to modulate signals, while a modem is used to demodulate signals.

  4. ((d))

    A modem connects to the network, while a NIC connects individual devices.

Show Answer
Answer: ((a))

A modem provides internet access, while a NIC manages local area network (LAN) traffic.

105

What is another name for PWM in communication engineering?

  1. ((a))

    Pulse Amplitude Modulation (PAM)

  2. ((b))

    Pulse Code Modulation (PCM)

  3. ((c))

    Pulse Duration Modulation (PDM)

  4. ((d))

    Pulse Position Modulation (PPM)

Show Answer
Answer: ((a))

Pulse Amplitude Modulation (PAM)

106

In a priority encoder, what happens when two or more input lines are active at the same time?

  1. ((a))

    The encoder will output the binary code for the lowest priority active input.

  2. ((b))

    The encoder will output an error.

  3. ((c))

    The encoder will output the binary code for the highest priority active input.

  4. ((d))

    The encoder will output the binary code for both the priority active inputs.

Show Answer
Answer: ((a))

The encoder will output the binary code for the lowest priority active input.

107

Dielectric strength is an important property of insulating materials. Which of the following best describes the dielectric strength of a material?

  1. ((a))

    The electrical conductivity of a material under stress

  2. ((b))

    The maximum voltage a dielectric material can withstand without breaking down

  3. ((c))

    The amount of heat a material can tolerate before melting

  4. ((d))

    The resistance of a material to thermal expansion

Show Answer
Answer: ((a))

The electrical conductivity of a material under stress

108

Which operator is used for bitwise OR in C?

  1. ((a))

    ~

  2. ((b))

    &&

  3. ((c))

    I

  4. ((d))

    II

Show Answer
Answer: ((a))

~

109

Which combination of symbols represents an XOR (Exclusive-OR) gate?

  1. ((a))

    An OR gate with a bubble at the output.

  2. ((b))

    An AND gate with an additional curved at the input end.

  3. ((c))

    An AND gate with a bubble at the output

  4. ((d))

    An OR gate with an additional curve at the input end.

Show Answer
Answer: ((a))

An OR gate with a bubble at the output.

110

Which of the following materials is typically preferred for electrical conductors due to its high conductivity and resistance to corrosion?

  1. ((a))

    Manganin

  2. ((b))

    Gold

  3. ((c))

    Steel

  4. ((d))

    Copper

Show Answer
Answer: ((a))

Manganin

111

Analyse the given program for 8085 and answer the question that follows.

MVI B, 06h

MVI A, F2H

ADD B

What is the content of Accumulator Register after the execution of the given program?

  1. ((a))

    F8h

  2. ((b))

    6Bh

  3. ((c))

    6Ah

  4. ((d))

    F0h

Show Answer
Answer: ((a))

F8h

112

There are ______ register banks in the 8051 microcontroller.

  1. ((a))

    three

  2. ((b))

    four

  3. ((c))

    six

  4. ((d))

    two

Show Answer
Answer: ((a))

three

113

In the internal circuit diagram of an IC 741 Op-amp, the second stage is also known as _________.

  1. ((a))

    intermediate stage

  2. ((b))

    input stage

  3. ((c))

    level shifting stage

  4. ((d))

    output stage

Show Answer
Answer: ((a))

intermediate stage

114

Which application commonly uses mineral insulating materials due to their mechanical strength and electrical insulating properties?

  1. ((a))

    Batteries and electrodes

  2. ((b))

    Electrical insulators for high-voltage transmission lines

  3. ((c))

    Electrical wires for household use

  4. ((d))

    Low-voltage electronic devices

Show Answer
Answer: ((a))

Batteries and electrodes

115

What determines the length of the delay in an electrical delay line used in

oscilloscopes?

  1. ((a))

    The propagation speed of the signal in the line

  2. ((b))

    The resistance of the delay line

  3. ((c))

    The frequency of the input signal

  4. ((d))

    The speed of the electron beam

Show Answer
Answer: ((a))

The propagation speed of the signal in the line

116

Which of the following statements about rectifiers is INCORRECT?

  1. ((a))

    The transformer utilization factor (TUF) is equal for both the bridge and center-tapped rectifier.

  2. ((b))

    Each half of the secondary winding of a center-tapped transformer is utilised for only half the time.

  3. ((c))

    The transformer utilization factor (TUF) is higher for a full-wave rectifier compared to a half-wave rectifier.

  4. ((d))

    The transformer utilization factor (TUF) is better for a bridge rectifier compared to a center-tapped rectifier.

Show Answer
Answer: ((a))

The transformer utilization factor (TUF) is equal for both the bridge and center-tapped rectifier.

117

What is the Boolean expression for the Carry-out (C) output of a Half Adder?

  1. ((a))

    C = A ⊕ B

  2. ((b))

    C = A OR B

  3. ((c))

    C = A AND B ⊕ Cin

  4. ((d))

    C = A AND B

Show Answer
Answer: ((a))

C = A ⊕ B

118

Which of the following statements about a bipolar junction transistor (BJT) is correct?

  1. ((a))

    IE = [ IC/β ] + βIB

  2. ((b))

    Collector current is the sum of emitter current and base current.

  3. ((c))

    If β is the common emitter amplifier current gain, then IC = βIE

  4. ((d))

    The current gain in common base amplifier is the ratio of collector current to base current.

Show Answer
Answer: ((a))

IE = [ IC/β ] + βIB

119

A half-wave rectifier is designed using a transformer and a diode. The primary winding of the transformer, with N1 turns, is connected to a 240 sin(ωt) V supply. The secondary winding has N2 turns. What is the rectified DC output voltage (Vdc) if N1/N2 = 1 : 1?

  1. ((a))

    240π

  2. ((b))

    240/π

  3. ((c))

    240

  4. ((d))

    480/π

Show Answer
Answer: ((a))

240π

120

A positive edge-triggered T Flip-Flop has T = 1. If the current output Q is 0, what will be the output Q after 3 clock pulses?

  1. ((a))

    0

  2. ((b))

    Unchanged

  3. ((c))

    1

  4. ((d))

    Toggles

Show Answer
Answer: ((a))

0

121

In which modulation technique is the carrier modulated using phase shifts of 0°, 90°, 180°, and 270°?

  1. ((a))

    QPSK (Quadrature Phase Shift Keying)

  2. ((b))

    ASK (Amplitude Shift Keying)

  3. ((c))

    BPSK (Binary Phase Shift Keying)

  4. ((d))

    FSK (Frequency Shift Keying)

Show Answer
Answer: ((a))

QPSK (Quadrature Phase Shift Keying)

122

What is the 2's complement of the binary number 101110?

  1. ((a))

    010011

  2. ((b))

    010010

  3. ((c))

    110001

  4. ((d))

    010001

Show Answer
Answer: ((a))

010011

123

Which of the following is NOT true about Unshielded Twisted Pair (UTP) cables?

  1. ((a))

    They have a higher resistance to EMI than STP cables.

  2. ((b))

    They are commonly used in local area networks (LANs).

  3. ((c))

    They are lighter and more flexible than STP cables.

  4. ((d))

    They are cost-effective for short-distance communication.

Show Answer
Answer: ((a))

They have a higher resistance to EMI than STP cables.

124

What is the output of a EX-OR gate when both inputs are '1'?

  1. ((a))

    Undefined

  2. ((b))

    Z

  3. ((c))

    1

  4. ((d))

    0

Show Answer
Answer: ((a))

Undefined

125

What is the region around a magnet where the magnetic force is experienced known as?

  1. ((a))

    Magnetic field

  2. ((b))

    Magnetic flux

  3. ((c))

    Magnetic domain

  4. ((d))

    Magnetic pole

Show Answer
Answer: ((a))

Magnetic field

126

In which topology does a failure in one node NOT affect the entire network?

  1. ((a))

    Ring topology

  2. ((b))

    Fully connected mesh topology

  3. ((c))

    Star topology

  4. ((d))

    Bus topology

Show Answer
Answer: ((a))

Ring topology

127

_______ interrupt is a positive edge sensitive interrupt and can be triggered with a short pulse.

  1. ((a))

    RST 6.5

  2. ((b))

    RST 7.5

  3. ((c))

    RST 5.5

  4. ((d))

    RST 4.5

Show Answer
Answer: ((a))

RST 6.5

128

Which of the following statements is correct when comparing a bridge rectifier to a centre-tapped full-wave rectifier?

  1. ((a))

    The PIV of both rectifiers is the same.

  2. ((b))

    The transformer utilisation factor is the same for both circuits.

  3. ((c))

    A bridge rectifier has double the peak inverse voltage (PIV) compared to a centre-tapped rectifier.

  4. ((d))

    The transformer utilisation factor (TUF) is better for a bridge rectifier than for a centre-tapped rectifier.

Show Answer
Answer: ((a))

The PIV of both rectifiers is the same.

129

In an asynchronous counter, the clock input of each flip-flop except first flip-flop is connected to:

  1. ((a))

    the same clock source

  2. ((b))

    the output of the previous flip-flop

  3. ((c))

    a separate clock source

  4. ((d))

    a common reset line

Show Answer
Answer: ((a))

the same clock source

130

If a C program contains only one function, it must be __________.

  1. ((a))

    primary()

  2. ((b))

    void()

  3. ((c))

    major()

  4. ((d))

    main( )

Show Answer
Answer: ((a))

primary()

131

In a 3-to-8 decoder, how many outputs are active for any given input?

  1. ((a))

    2

  2. ((b))

    8

  3. ((c))

    3

  4. ((d))

    1

Show Answer
Answer: ((a))

2

132

Which of the following is NOT a commonly used pulse-shaping filter in communication systems?

  1. ((a))

    Raised cosine filter

  2. ((b))

    Sinc filter

  3. ((c))

    Gaussian filter

  4. ((d))

    High-pass filter

Show Answer
Answer: ((a))

Raised cosine filter

133

In a 100% modulated AM signal with a carrier power of 100 W, what is the power in the lower sideband?

  1. ((a))

    50 W

  2. ((b))

    25 W

  3. ((c))

    15 W

  4. ((d))

    150 W

Show Answer
Answer: ((a))

50 W

134

A Colpitts oscillator is designed as a radio frequency oscillator. Which of the following statements is INCORRECT?

  1. ((a))

    It operates on the principle of parallel resonance.

  2. ((b))

    In a Colpitts oscillator, two capacitors and an inductor form the feedback network.

  3. ((c))

    The frequency of oscillation is ω=1L(C1+C2C1C2)\omega = \frac{1}{\sqrt{L\left(\frac{C_1 + C_2}{C_1 C_2}\right)}}

  4. ((d))

    An LC network is used in the design of Colpitts oscillators.

Show Answer
Answer: ((a))

It operates on the principle of parallel resonance.

135

The Fourier Transform of an real and even function results in:

  1. ((a))

    a purely real and odd function

  2. ((b))

    a purely imaginary and even function

  3. ((c))

    an imaginary and odd function

  4. ((d))

    a purely real and even function

Show Answer
Answer: ((a))

a purely real and odd function

136

In an n-type semiconductor, which of the following is true regarding the majority charge carriers?

  1. ((a))

    The majority charge carriers are electrons.

  2. ((b))

    The semiconductor contains an equal number of electrons and holes.

  3. ((c))

    The majority charge carriers are holes.

  4. ((d))

    The majority charge carriers are protons.

Show Answer
Answer: ((a))

The majority charge carriers are electrons.

137

Which of the following statements about the AM detection using PLL circuit is/are correct?

S1: It has higher noise immunity than the conventional peak detector type AM detector.

S2: The PLL is locked to the carrier frequency of the AM signal.

  1. ((a))

    Only S1

  2. ((b))

    Only S2

  3. ((c))

    Neither S1 nor S2

  4. ((d))

    Both S1 and S2

Show Answer
Answer: ((a))

Only S1

138

An ideal diode is connected in series with a 1 kΩ load resistor and the input voltage is given as V(t) = sin2(t) + cos2(t) V. What is the average output voltage across the load resistor?

  1. ((a))

    Average voltage cannot be determined

  2. ((b))

    +1/2 V

  3. ((c))

    0 V

  4. ((d))

    +1 V

Show Answer
Answer: ((a))

Average voltage cannot be determined

139

Which of the following is a unary operator in C?

  1. ((a))

    --

  2. ((b))
  3. ((c))
  4. ((d))

    %

Show Answer
Answer: ((a))

--

140

Which of the following statements about oscillator circuits is FALSE?

  1. ((a))

    A circuit that generates a sine wave without any input is called a linear oscillator.

  2. ((b))

    A circuit that generates a non-sinusoidal wave without any input is called a linear oscillator.

  3. ((c))

    The frequency of an oscillator depends on the RC or LC network.

  4. ((d))

    Multivibrators are used for generating non-sinusoidal waveforms.

Show Answer
Answer: ((a))

A circuit that generates a sine wave without any input is called a linear oscillator.

141

How does the SNMP Agent communicate with the SNMP Manager?

  1. ((a))

    By generating encrypted data streams

  2. ((b))

    By responding to GET and SET requests from the SNMP Manager

  3. ((c))

    By initiating a TCP connection

  4. ((d))

    By sending files via FTP

Show Answer
Answer: ((a))

By generating encrypted data streams

142

Which of the following is the syntax of the conditional operator in C?

  1. ((a))

    expression1 ? expression2 : expression3

  2. ((b))

    expression || expression1 && expression2

  3. ((c))

    condition1 : expression1 ? expression2

  4. ((d))

    condition1 && expression1 || expression2

Show Answer
Answer: ((a))

expression1 ? expression2 : expression3

143

Which of the following components is required to detect (demodulate) Pulse Position Modulation (PPM)?

a) Pulse Generator

b) RS Flip-Flop

c) PWM Demodulator

  1. ((a))

    Only a

  2. ((b))

    All a, b, and c

  3. ((c))

    Only c

  4. ((d))

    Only a and b

Show Answer
Answer: ((a))

Only a

144

In a magnetic circuit, if the reluctance of a path increases, which of the following occurs?

  1. ((a))

    The magnetomotive force (MMF) will increase.

  2. ((b))

    The magnetic flux will increase.

  3. ((c))

    The magnetic flux will decrease.

  4. ((d))

    The resistance to magnetic flux will decrease.

Show Answer
Answer: ((a))

The magnetomotive force (MMF) will increase.

145

Which of the following characteristics is associated with a distance relay used for fault protection?

  1. ((a))

    It operates based on the impedance between the relay and the fault.

  2. ((b))

    It is used only for short-circuit protection.

  3. ((c))

    It operates based on the current only.

  4. ((d))

    It operates based on the voltage at the fault location.

Show Answer
Answer: ((a))

It operates based on the impedance between the relay and the fault.

146

In a Nickel-Iron cell, which of the following best describes the working principle during the discharging process?

  1. ((a))

    Nickel at the positive electrode is reduced to metallic nickel, and iron hydroxide at the negative electrode is oxidised.

  2. ((b))

    Iron at the negative electrode is oxidised to iron oxide, and nickel at the positive electrode is reduced to nickel hydroxide.

  3. ((c))

    Nickel hydroxide at the positive electrode is reduced to metallic nickel, and iron is oxidised at the negative electrode.

  4. ((d))

    Iron at the negative electrode is reduced to metallic iron, and nickel hydroxide at the positive electrode is oxidised.

Show Answer
Answer: ((a))

Nickel at the positive electrode is reduced to metallic nickel, and iron hydroxide at the negative electrode is oxidised.

147

In an op-amp integrator circuit, the output voltage is proportional to the _______.

  1. ((a))

    cube of the input signal

  2. ((b))

    sum of the input signal

  3. ((c))

    integral of the input signal

  4. ((d))

    derivative of the input signal

Show Answer
Answer: ((a))

cube of the input signal

148

The DMA sends DACK - acknowledgement signal to the peripheral when _______.

  1. ((a))

    higher address bus A8- A15 is available on the address bus

  2. ((b))

    MPU sends the HLDA signal

  3. ((c))

    entire address bus A0- A15 is available on the address bus

  4. ((d))

    lower address bus A0- A7 is available on the address bus

Show Answer
Answer: ((a))

higher address bus A8- A15 is available on the address bus

149

Which of the following factors is primarily used to determine the rating of a resistor?

  1. ((a))

    Material used for construction

  2. ((b))

    Power dissipation capacity

  3. ((c))

    Temperature coefficient

  4. ((d))

    Colour code

Show Answer
Answer: ((a))

Material used for construction

150

What is the output of the following code?

int i = 1 ;

while ( i <= 10 )

printf ( "%d\n", i );

  1. ((a))

    10 9 8 7 6 5 4 3 2 1

  2. ((b))

    1 2 3 4 5 6 7 8 9 10

  3. ((c))

    0 1 2 3 4 5 6 7 8 9

  4. ((d))

    Infinite loop

Show Answer
Answer: ((a))

10 9 8 7 6 5 4 3 2 1

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