Computer Knowledge PYQs

The correct answer is touchpad

Additional Information

• A touchpad in the computer system uses pressure as a user presses it with a stylus to send signals.
• A touchpad (also called a trackpad) is a type of input device for computers that does the same things as a computer mouse. It is made up of a flat, touch-sensitive surface which the user slides one or more fingers on to move the cursor on the screen.

The correct answer is 32-bit.

Important Points

• IPv4 was the primary version of IP.
• It was sent for creation in the ARPANET in 1983.
• It is generally utilized IP adaptation.
• The IPv4 uses a 32-bit address scheme.
• IPv4 binary bits are separated by a dot(.)
• IPv4 support broadcast.
• IPv4 binary bits are a dot(.).
• IPv4 security permits encryption to keep up privacy and security.
• IPV4 addresses are redefined and permit flawless encoding.
• Routing is a lot scalable and economical as a result of addressing is collective more effectively.
• Data communication across the network becomes a lot of specific in multicast organizations.

Additional Information

• IP Address is either a four-byte (IPv4) or an sixteen byte (IPv6) address.
• A device attached with IP Address can retrieve by RARP protocol.
• IP Address operates in the network layer.
• IP Address identifies the connection of the device on the network.
• IP Address modifies with the time and environment.
• IP Addresses can be found by a third party.

The correct answer is 128 bit.

Key Points

• Internet Protocol version 6  is the most recent version of the Internet Protocol.
• IPv6 uses a 128-bit address, theoretically allowing 2¹²⁸, or approximately 3.4×1038 addresses.
• IPv6 addresses are represented as eight groups, separated by colons, of four hexadecimal digits.
• IPv6 was developed by the Internet Engineering Task Force.

Additional Information

• Each network that runs TCP/IP must have a unique network number.
• Every machine on the network must have a unique IP address.
• The IPv4 address is a 32-bit number that uniquely identifies a network interface on a machine.
• An IPv4 address is typically written in decimal digits, formatted as four octets that are separated by periods.
• Each 8-bit field represents a byte of the IPv4 address.
• This form of representing the bytes of an IPv4 address is often referred to as the dotted-decimal format.
• The bytes of the IPv4 address are further classified into two parts: the network part and the host part.
• The following figure shows the component parts of a typical IPv4 address.
• 129.144.50.56.

 

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Important Points

Components of IP address

• Network Part
• The network part specifies the unique number that is assigned to the network.
• The networks part also identifies the class of network that is assigned.
• Host Part
• This is the part of the IPv4 address that is assigned to each host.
• The host part uniquely identifies the machine on our network.
• For each host on our network, the network part of the address is the same, but the host part must be different.

The correct answer is Mother board.

• The motherboard is a printed circuit board and foundation of a computer that is the biggest board in a computer chassis.
• It allocates power and allows communication to and between the CPU, RAM, and all other computer hardware components.
• A motherboard provides connectivity between the hardware components of a computer, like a processor (CPU), memory (RAM), hard drive, and video card.
• A computer motherboard is located inside the computer case and is where most of the parts and computer peripherals connect.

Additional Information

Octal to decimal conversion →

(12)₈ = 1 × 8¹ + 2 × 8⁰ = 8 + 2 = (10)₂

Option 1 is correct, i.e. MODEM.

Key Points

• A modem is a hardware device that allows a computer to send and receive data over a telephone line or a cable or satellite connection.
• MODEM stands for modulator-demodulator.

Additional Information 

• A modem is used for transmitting and receiving data over a communication channel, such as twisted-pair telephone lines, coaxial cables, and optical fibers.
• At the source, the modulation technique is used to convert the analog signal to digital.
• At the receiver, demodulation is used to convert the digital signal back to analog.

The correct answer is Both 2 and 3

Key Points

• A firewall is a software program that prevents unauthorized access to or from a private network. Firewalls are tools that can be used to enhance the security of computers connected to a network, such as LAN or the Internet. They are an integral part of a comprehensive security framework for your network.

Additional Information 

• Firewalls are designed as a barricade to keep out untrustworthy entities and traffic. A firewall can be a software or hardware-based system that serves as around the clock traffic cop, prohibiting any traffic that you don’t want inside your network. You define the traffic to be permitted into your network. Anything else simply has no access.
• Some of the benefits of using a firewall for your LAN are-

1. Stricter access control to critical resources
2. Greater security to your LAN

The correct answer is Preventing unauthorized access.

Key Points

• A firewall is a kind of security-conscious type of hardware or software that stays between the computer and our network with a primary task: preventing malicious software from reaching us.
• In other words, we can say that the firewall works like a security guard between the Internet and our local area network (LAN). All network traffic passing through the LAN must face the firewall, which restricts unauthorized access to the network.

Additional Information 

• Following are the types of Firewalls -

1. Packet-filtering firewall: It checks every packet that passes the firewall and examines the packet as per the set of rules that the user sets up. If the packet gets to pass the test, it’s allowed to go through. If the packet fails to pass the test then it is rejected. Packet filters are the most inexpensive variety of firewalls. That is why packet-filtering firewalls are used very commonly.
2. Stateful packet inspection (SPI): It is installed in accordance with simple packet filtering. A firewall having Stateful packet checking looks at packets in clusters instead of doing individually. It maintains the record of all those packets have crossed through the firewall and can create patterns that indicate unauthorized entry.
3. Deep packet inspection (DPI): It is the actual data of the packets is checked so viruses, spam, and other harmful content can be restricted. DPI also enables practices, such as data mining, eavesdropping, and content censorship, which make its way through a controversial subject.

Epic is NOT correct.

Key Points 

• Among the options, only Epic is NOT a social networking site.
• Epic is a web browser.
• Epic is the first web browser developed in India.
• It was developed by the Bengaluru based Hidden Reflex company.
• It was launched on 29^th August 2013.
• Epic is available in 13 languages and the foregoing languages such as Arabic, Chinese, Russian, and Greek.
• It is the first web browser built on Chromium engineered to protect users privacy.
• Social networking is an online platform in which people use to build social networks with other people who share similar personal or career interest.

Additional Information 

• Important social networking sites are:
• Facebook.
• Linked In.
• Twitter.
• YouTube.
• Instagram.
• Skype.
• Tumblr.
• WeChat,
• Flickr.
• Facebook was started in the year 2004.
• Mark Zuckerberg is the founder of Facebook.
• Twitter is known as the 'SMS in the world of internet'.
• Messages posts in Twitter are known as tweets.

The correct answer is Hyperlink.

Key Points

• A hyperlink is a text or an image within a file on your computer that you can click on that gives access to another document or image.

Additional Information

• A hyperlink can be thought of as an interface that links a source to a target. Clicking the hyperlink at the source will navigate to the target. Hyperlinks can assume any of the following appearances:

➔    Text

➔    Images

➔    URLs

➔    Controls (for example, a button)

The correct answer is option 3, i.e. 9. Additional Information

• Windows XP, Windows 7, Windows 8 and Windows 10 are the windows operating system versions.
• Windows 9 never released.
• Microsoft company released Windows 10 OS directly after Windows 8 OS.
• Satya Nadella is the current CEO of the Microsoft company.

The correct answer is Trackball.

Key Points

• A trackball is an input device used to enter motion data into computers or other electronic devices.
• Trackballs designed for computers usually serve as mouse replacements and are essentially used to move the cursor on the screen.
• An input device forwards information to a computer system for processing. Input devices only allow for input of data to a computer.
• Output device reproduces or displays the results of the processing. Output devices only receive the output of data from another device.

The correct answer is Cache memory.

Important Points

• Cache memory is a very high-speed semiconductor memory which can speed up the CPU.
• Cache memory acts as a buffer between the main memory and the CPU.  It holds the most frequently used part of the program and data.
• Some advantages of cache memory are -
• For temporary use, it is helpful in storing data.
• It is faster than the main memory.

Additional Information

• Cache memory holds only those data and instructions that are hold by the primary memory or main memory on which the computer is currently working.
• For storing data/information permanently secondary memory also known as external memory or non-volatile is used.

The correct answer is It compares two-word documents.

Additional Information

• 'Compare' option in MS Word 2007 is used to compares two-word documents.
• This option is available in the Review tab of the ribbon.
• It will compare every aspect like font size, white spaces, font color, etc.
• It limits the comparison to only two documents at a given time.
• Along with the compare option, there is one more option named 'Combine'.
• 'Combine' option is used to combine two-word documents.

The correct answer is Network Cards.

Important Points

• Network Card is the hardware device used for networking.
• It is a circuit board located near the USB port at the back.
• Network cards work as both input as well and output devices.
• It is also known as a Local area Network card, Ethernet card, or Network card Only. It is also known as an interface controller.
• It can be in the form of an Onboard that is present in the system itself or can be offboarded like an Expansion slot.
• it usually is on the back of the computer near the bottom near the PCI slot.
• On laptops, the Network card is mostly integrated into the Motherboard.
• If a Network card is not present on the computer or laptop it must have a wireless network Connection.

Key Points

Functions of the Network Interface Card

• A network card functions as a middle person between the computer and the data network.
• Ex: when we log in to a website the PC passes information to the Network card which converts it into an electrical signal and then we get a web page.
• It works like a Translator, which converts data into a digital signal.
• It communicates over a long distance.

The Correct Answer is Ctrl+E.

 

Key Points

• Ctrl + E makes the text in a word document centred.

 

Important Points

• Ctrl + A Selects all text.
• Ctrl + G opens the Find and replace options.
• Ctrl+C Copy the selected text.

 

Additional Information

Word shortcut keys

The correct answer is All of these

Key Points

All the above-mentioned options like MS-word, MS-Excel, MS-PowerPoint extra, have different functions as per the requirement of the users.

Additional Information

• Microsoft Office is a set of computer applications mainly used for business or office purposes. First introduced in 1990, Office software is made by the Microsoft Corporation.

• MS Office helps simplify basic office tasks and improve work productivity. Each application is designed to address specific tasks, such as word processing, data management, making presentations, and organizing emails.

• Microsoft has developed multiple versions of Office that can be supported by different operating systems, including Windows, Linux, and macOS.Microsoft Office is also offered in 35 different languages.

• The most common Office applications are Word, Excel, PowerPoint, and Outlook. Other apps include Publisher, Access, and OneNote.

• Here’s a brief explanation of each of the different apps and what you can use them for:

• Microsoft Word: is a word processor that lets users make and edit text documents, such as reports, letters, and résumés and run spell-checks on writing

• Microsoft Excel: is an electronic spreadsheet program that helps you store, organize and manipulate data by creating simple to complex spreadsheets

• Microsoft PowerPoint: allows you to visually display information, using anything from basic slideshows to professional multimedia presentations

• Microsoft Outlook: is a personal information manager mainly used for emails but that can also be used to store calendars and contact information, manage tasks as well as organize meetings

• Microsoft Publisher: is a graphic design app that gives users creating material for marketing or publications more options in the layout and design of their documents

• Microsoft Access: is a database management system that allows you to link and use data from other sources, manipulate the data you’ve gathered in different ways, as well as create simple business applications

• Microsoft OneNote: is a digital alternative to a paper notebook that allows you to create, organize and share your notes easily

• Microsoft Office is either available as a package or you can buy stand-alone Microsoft Office applications, such as Word or Excel separately.

The correct answer is a-q, b-p, c-s, d-r.

• Computer hardware includes the physical parts of a computer, such as a case, central processing unit (CPU), monitor, mouse, keyboard, computer data storage, graphics card, sound card, speakers, and motherboard.
• By contrast, the software is the set of instructions that can be stored and run by hardware.

Additional Information

• An input device is any hardware device that sends data to a computer, allowing you to interact with and control it.
• A Logitech trackball mouse, which is an example of an input device.
• The most commonly used or primary input devices on a computer are the keyboard and mouse. However, there are other devices that input data into a computer.

Data remains even after power supply is not present is NOT correct.

Key Points 

• RAM is the acronym of Random Access Memory.
• RAM is the internal memory of the CPU for data storage.
• RAM is usually termed as the main memory of the system.
• Ram is a volatile memory.
• RAM losses its data when the computer is turned off.
• RAM as a solid-state memory, was first invented in by Robert Dennard.

Important Points 

• The key features of RAM are:
• It is a read/write memory.
• Allows users to store multiple gigabytes (GB) of data.
• It can be accessed by the Central Processing Unit
• Can be read, erased or modified.
• Data in the RAM can be accessed randomly.
• RAM is small in case its physical size and in the amount of data it can hold.

The correct answer is Operating system

Key Points

• Windows is the name of the operating system by Microsoft. 95,98 and NT are the different versions of the windows OS.

Additional Information

• An operating system is a powerful, and usually large, program that controls and manages the hardware and other software on a computer.
• All computers and computer-like devices require operating systems, including your laptop, tablet, desktop, smartphone, smartwatch, and router.
• Some examples include versions of Microsoft Windows (like Windows 10, Windows 8, Windows 7, Windows Vista, and Windows XP), Apple's macOS (formerly OS X), Chrome OS, BlackBerry Tablet OS, and flavors of Linux, an open-source operating system.