Question 1

The '.zip' file format represents:

Accepted Answer

Correct Answer: Compressed file

Explanation: A .zip file is a compressed archive file format. It supports lossless data compression. A .zip file may contain one or more files or directories that have been compressed. This reduces file size, making it easier to email or store data.

Question 2

Which unit is used to measure the speed of a mouse pointer?

Accepted Answer

Correct Answer: DPI

Explanation: Mouse sensitivity is measured in DPI (Dots Per Inch). It measures how many pixels the cursor moves on the screen for every inch the mouse moves physically. Higher DPI means the cursor moves faster and requires less physical movement.

Question 3

What is 'Encryption'?

Accepted Answer

Correct Answer: Encoding data for security

Explanation: Encryption is the process of encoding information. This process converts the original representation of the information, known as plaintext, into an alternative form known as ciphertext. Only authorized parties can decipher a ciphertext back to plaintext.

Question 4

Which key is used to capture a screenshot?

Accepted Answer

Correct Answer: Print Screen

Explanation: The Print Screen (PrtScn) key is used to capture an image of the entire screen. The image is copied to the clipboard and can be pasted into an image editor or document. On some laptops, it requires pressing the Fn key + PrtScn.

Question 5

HTTP stands for:

Accepted Answer

Correct Answer: Hyper Text Transfer Protocol

Explanation: HTTP stands for Hypertext Transfer Protocol. It is the foundation of data communication for the World Wide Web. It defines how messages are formatted and transmitted. HTTPS is the secure version of this protocol, which encrypts data.

Question 6

What does 'SSD' stand for?

Accepted Answer

Correct Answer: Solid State Drive

Explanation: SSD stands for Solid State Drive. It is a new generation of storage device used in computers. SSDs use flash-based memory, which is much faster than a traditional mechanical hard disk. They have no moving parts, making them more durable and silent.

Question 7

The speed of a printer is measured in:

Accepted Answer

Correct Answer: PPM

Explanation: Printer speed is typically measured in PPM (Pages Per Minute). It indicates how many pages a printer can print in one minute. Laser printers usually have a higher PPM than inkjet printers. Text printing is faster than image printing.

Question 8

Which of the following is an example of an 'Open Source' Operating System?

Accepted Answer

Correct Answer: Linux

Explanation: Linux is an Open Source Operating System. This means its source code is freely available for anyone to use, modify, and distribute. Unlike Windows or macOS, which are proprietary and closed, Linux is developed by a community. It is very secure and stable.

Question 9

Ctrl + A is used for:

Accepted Answer

Correct Answer: Select All

Explanation: Ctrl + A is the keyboard shortcut to 'Select All'. It selects all text, files, or other objects in the current window or document. This is useful when you want to copy, move, or delete everything at once without selecting manually.

Question 10

What is 'Phishing'?

Accepted Answer

Correct Answer: An internet fraud to steal data

Explanation: Phishing is a cybercrime in which a target is contacted by email or message by someone posing as a legitimate institution. The goal is to lure individuals into providing sensitive data such as banking and credit card details and passwords.

Question 11

Which computer is used for weather forecasting?

Accepted Answer

Correct Answer: Super Computer

Explanation: Supercomputers are used for weather forecasting. These are the fastest and most powerful computers available. Weather prediction requires processing massive amounts of data from satellites and sensors in real-time, which only a supercomputer can handle.

Question 12

Which port is used to connect a monitor to a computer?

Accepted Answer

Correct Answer: VGA

Explanation: VGA (Video Graphics Array) is a standard connector used for computer video output. It connects the computer to a monitor or projector. Although HDMI is more common now, VGA is still widely used in older systems. It carries analog video signals.

Question 13

The extension '.jpg' refers to which kind of file?

Accepted Answer

Correct Answer: Image

Explanation: .jpg (or .jpeg) stands for Joint Photographic Experts Group. It is a commonly used method of lossy compression for digital images. It is the most common image format used by digital cameras and other photographic image capture devices.

Question 14

Which key allows you to switch between open applications?

Accepted Answer

Correct Answer: Alt + Tab

Explanation: Alt + Tab is a keyboard shortcut used to switch between open windows or applications. Holding down Alt and tapping Tab displays a list of running apps. Releasing the keys switches focus to the selected application. It is a multitasking tool.

Question 15

What does 'Wi-Fi' stand for?

Accepted Answer

Correct Answer: Wireless Fidelity

Explanation: Wi-Fi stands for Wireless Fidelity. It is a technology for wireless local area networking with devices. It allows electronic devices to connect to a network resource such as the Internet via a wireless network access point (hotspot).

Question 16

1 Terabyte (TB) is equal to:

Accepted Answer

Correct Answer: 1024 GB

Explanation: 1 Terabyte (TB) is equal to 1024 Gigabytes (GB). This is a massive amount of storage, common in modern hard drives and SSDs. To put it in perspective, 1 TB can hold about 500 hours of HD video or 17,000 hours of music.

Question 17

Which device is used for reading cheques in a bank?

Accepted Answer

Correct Answer: MICR

Explanation: MICR (Magnetic Ink Character Recognition) is used by banks. It allows computers to read information (like account numbers) printed on cheques using special magnetic ink. It is highly secure and fast, reducing errors in processing large volumes of cheques.

Question 18

Ctrl + S is used to:

Accepted Answer

Correct Answer: Save

Explanation: Ctrl + S is the standard shortcut key to Save a document or file. It writes the current state of the document to the storage device (hard drive). Frequent saving is recommended to prevent data loss in case of a crash. In browsers, it saves the webpage.

Question 19

Which of the following is a Search Engine?

Accepted Answer

Correct Answer: Google

Explanation: Google is a Search Engine. A search engine is a software system designed to carry out web searches. It searches the World Wide Web in a systematic way for particular information specified in a textual web search query. Other examples include Bing and Yahoo.

Question 20

What is the function of the 'Recycle Bin'?

Accepted Answer

Correct Answer: To store deleted files

Explanation: The Recycle Bin is a temporary storage area for deleted files in Windows. When you delete a file, it is moved to the Recycle Bin instead of being permanently erased. This allows users to restore files if they were deleted by mistake. Emptying the bin deletes them permanently.

Computer Basics MCQs