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Browse complete papersYou need to read a floating-point value from the user in the C programming language.
Which of the following statements correctly performs this task?
float x; scanf("%f",*x);
float x; scanf("%d" , &x);
float x; scanf("%f" , x);
float x; scanf("%f, &x);
Correct answer
float x; scanf("%f",*x);
In a centralized switching system,
what is the Control Unit responsible for?
Physically moving the copper wires
Generating the voice of the caller
Generating the ringing voltage only
Processing dialed digits and managing call setup
Correct answer
Physically moving the copper wires
A designer is selecting an LED driver for an outdoor display exposed to dust and rain.
Which specification should be examined first to determine whether the driver can withstand these environmental conditions?
Dimming compatibility
Output current tolerance
Power factor rating
Ingress Protection (IP) rating
Correct answer
Dimming compatibility
What are the statements that begin with # symbol called in C programming language?
Comments
Control statements
Function declarations
Preprocessor Directives
Correct answer
Comments
In an analog Stored Program Control (SPC) system,
the Program manages:
The electronic connection of the analog matrix
The digital conversion of the voice signal
The internet connection of the subscriber
The brightness of the telephone screen
Correct answer
The electronic connection of the analog matrix
The holding current of an SCR is defined as the:
Minimum anode current required to turn on the SCR
Gate current required to turn off the SCR
Minimum anode current required to keep the SCR in conduction state
Maximum anode current the SCR can withstand
Correct answer
Minimum anode current required to turn on the SCR
In the 8085 microprocessor,
what happens to the Stack Pointer after execution of PUSH instruction?
Unchanged
Incremented by 1
Decremented by 2
Incremented by 2
Correct answer
Unchanged
Which cable transmits data using light signals?
Coaxial cable
Fiber optic cable
USB cable
Twisted pair cable
Correct answer
Coaxial cable
A synchronous counter is a counter in which:
All flip-flops are triggered simultaneously
No clock is used
Only one flip-flop is used
Flip-flops are triggered one by one
Correct answer
All flip-flops are triggered simultaneously
For Astable Multivibrator using IC 555,
to increase the frequency of an astable 555 circuit without changing the duty cycle ratio, what should a designer do? Assume standard terminologies and resistor names.
Increase the value of Capacitor C
Decrease the supply voltage
Decrease the value of C while keeping resistors RA and RB constant
Increase the value of R_A
Correct answer
Increase the value of Capacitor C