Q: Which device is used to input images into a computer?

Correct Answer: Scanner Explanation: A scanner is an input device that optically scans images, printed text, or handwriting and converts them into a digital image. This allows physical documents to be stored and edited on a computer.

Q: What is the full form of IP?

Correct Answer: Internet Protocol Explanation: IP stands for Internet Protocol. It is the set of rules governing the format of data sent via the Internet or local network. An IP address acts as a unique identifier for devices on a network.

Q: The keys QWERTY are associated with:

Correct Answer: Keyboard Explanation: QWERTY refers to the standard layout of keys on a keyboard. It is named after the first six letters on the top row of letters. It was designed in the 1870s for typewriters to prevent jamming and later adopted for computers.

Q: Which of the following is NOT an Operating System?

Correct Answer: Oracle Explanation: Oracle is a database management system, not an operating system. Linux, Windows, and DOS are examples of operating systems that manage computer hardware and software resources. Oracle is software for handling data.

Q: A 'Bug' in computer terminology means:

Correct Answer: Error in program Explanation: A 'Bug' refers to an error, flaw, or fault in a computer program or system that causes it to produce an incorrect result. The process of finding and fixing bugs is called 'debugging'. The term is attributed to Grace Hopper finding a moth in a relay.

Q: URL stands for:

Correct Answer: Uniform Resource Locator Explanation: URL stands for Uniform Resource Locator. It is the address of a given unique resource on the Web. For example, 'https://www.google.com' is a URL. It consists of the protocol (http), domain name, and path.

Q: Which device is used to connect a computer to the internet via telephone line?

Correct Answer: Modem Explanation: A Modem (Modulator-Demodulator) is used to connect a computer to the internet via telephone or cable lines. It converts digital signals from the computer into analog signals for transmission and vice versa. Routers distribute this connection.

Q: The key F1 is generally used for:

Correct Answer: Help Explanation: In almost all software programs, pressing the F1 key opens the Help menu. It provides information and instructions on how to use the application. It is a standard shortcut across Windows environments.

Question 1

The blinking symbol on the computer screen is called:

Accepted Answer

Correct Answer: Cursor

Explanation: The blinking symbol is called the Cursor. It indicates the position where the next character will be typed or where an action will take place. It often appears as a vertical line (|) in text editors.

Question 2

Which of the following is the largest unit of storage?

Accepted Answer

Correct Answer: TB

Explanation: TB (Terabyte) is the largest unit among the options. The hierarchy is: KB (Kilobyte) < MB (Megabyte) < GB (Gigabyte) < TB (Terabyte). 1 TB is equal to 1024 GB. Large servers use Petabytes (PB) and Exabytes (EB).

Question 3

Which device is used to input images into a computer?

Accepted Answer

Correct Answer: Scanner

Explanation: A scanner is an input device that optically scans images, printed text, or handwriting and converts them into a digital image. This allows physical documents to be stored and edited on a computer.

Question 4

What is the full form of IP?

Accepted Answer

Correct Answer: Internet Protocol

Explanation: IP stands for Internet Protocol. It is the set of rules governing the format of data sent via the Internet or local network. An IP address acts as a unique identifier for devices on a network.

Question 5

The keys QWERTY are associated with:

Accepted Answer

Correct Answer: Keyboard

Explanation: QWERTY refers to the standard layout of keys on a keyboard. It is named after the first six letters on the top row of letters. It was designed in the 1870s for typewriters to prevent jamming and later adopted for computers.

Question 6

Which of the following is NOT an Operating System?

Accepted Answer

Correct Answer: Oracle

Explanation: Oracle is a database management system, not an operating system. Linux, Windows, and DOS are examples of operating systems that manage computer hardware and software resources. Oracle is software for handling data.

Question 7

A 'Bug' in computer terminology means:

Accepted Answer

Correct Answer: Error in program

Explanation: A 'Bug' refers to an error, flaw, or fault in a computer program or system that causes it to produce an incorrect result. The process of finding and fixing bugs is called 'debugging'. The term is attributed to Grace Hopper finding a moth in a relay.

Question 8

URL stands for:

Accepted Answer

Correct Answer: Uniform Resource Locator

Explanation: URL stands for Uniform Resource Locator. It is the address of a given unique resource on the Web. For example, 'https://www.google.com' is a URL. It consists of the protocol (http), domain name, and path.

Question 9

Which device is used to connect a computer to the internet via telephone line?

Accepted Answer

Correct Answer: Modem

Explanation: A Modem (Modulator-Demodulator) is used to connect a computer to the internet via telephone or cable lines. It converts digital signals from the computer into analog signals for transmission and vice versa. Routers distribute this connection.

Question 10

The key F1 is generally used for:

Accepted Answer

Correct Answer: Help

Explanation: In almost all software programs, pressing the F1 key opens the Help menu. It provides information and instructions on how to use the application. It is a standard shortcut across Windows environments.

Question 11

1 Gigabyte (GB) is equal to:

Accepted Answer

Correct Answer: 1024 MB

Explanation: 1 Gigabyte (GB) is equal to 1024 Megabytes (MB). This is based on binary powers (2^30 bytes). It is a common unit for measuring hard drive capacity and RAM size. The next unit up is the Terabyte (TB).

Question 12

GUI stands for:

Accepted Answer

Correct Answer: Graphical User Interface

Explanation: GUI stands for Graphical User Interface. It allows users to interact with electronic devices through graphical icons and visual indicators instead of text-based command lines. Examples include Windows, macOS, and Android interfaces.

Question 13

LAN stands for:

Accepted Answer

Correct Answer: Local Area Network

Explanation: LAN stands for Local Area Network. It connects computers within a limited area such as a residence, school, or office building. Ethernet and Wi-Fi are the two most common technologies in use for LANs.

Question 14

Which technology was used in Second Generation computers?

Accepted Answer

Correct Answer: Transistors

Explanation: Second-generation computers (1956-1963) used Transistors. Transistors replaced vacuum tubes and were smaller, faster, cheaper, and more reliable. This allowed computers to become smaller and more efficient.

Question 15

A computer virus is a:

Accepted Answer

Correct Answer: Software Program

Explanation: A computer virus is a malicious software program (Malware). It is designed to replicate itself and spread to other computers. It can damage data, steal information, or disrupt system operations. Antivirus software is used to detect and remove them.

Question 16

Which is the fastest memory in a computer?

Accepted Answer

Correct Answer: Registers

Explanation: Registers are the fastest type of memory in a computer. They are located inside the CPU itself. They hold the data that the CPU is currently processing. The hierarchy of speed is: Registers > Cache > RAM > Hard Disk.

Question 17

ALU stands for:

Accepted Answer

Correct Answer: Arithmetic Logic Unit

Explanation: ALU stands for Arithmetic Logic Unit. It is a critical component of the CPU. It performs all arithmetic (addition, subtraction) and logical operations (AND, OR, NOT). It processes the actual data.

Question 18

The process of starting a computer is called:

Accepted Answer

Correct Answer: Booting

Explanation: Booting is the process of starting a computer. It involves loading the operating system from the hard disk into the main memory (RAM). A 'Cold Boot' is starting from the off state, while a 'Warm Boot' is restarting the computer.

Question 19

Which key is used to refresh the active window?

Accepted Answer

Correct Answer: F5

Explanation: The F5 key is commonly used to refresh or reload the active window or web page. F1 is typically used for Help. F2 is often used to rename a selected file. Function keys (F1-F12) have different functions depending on the software.

Question 20

USB stands for:

Accepted Answer

Correct Answer: Universal Serial Bus

Explanation: USB stands for Universal Serial Bus. It is an industry standard for connecting peripherals like keyboards, mice, and flash drives to a computer. It supports plug-and-play functionality. It can also transfer power to charge devices.

Computer Basics MCQs