All Free Computer Science and IT MCQs with Answers

221. The typical computer criminal is a(n)____________?

• A. Young hacker.
• B. Trusted employee with no criminal record.
• C. Trusted employee with a long, but unknown criminal record.
• D. Overseas young cracker.Fun & Trivia

Explanation: Many computer crimes are committed by insiders because trusted employees already have legitimate access to systems and data. The question uses “typical” broadly, but option b reflects the commonly taught insider-threat pattern.

222. The computer abbreviation KB usually means____________?

• A. Key Block
• B. Kernel Boot
• C. Kilo Byte
• D. Kit Bit

Explanation: KB traditionally means kilobyte, a unit of digital storage equal to 1,024 bytes in binary-based usage. “Kilo Byte” is the only matching option.

223. Large transaction processing systems in automated organisations use___________?

• A. Online processing
• B. Batch Processing
• C. Once-a-day Processing
• D. End-of-day processing

Explanation: Batch processing collects many transactions and processes them together, making it suitable for large-volume transaction systems. Online processing handles transactions individually and immediately.

224. Which of the following is the smallest storage?

• A. Megabyte
• B. Gigabyte
• C. Terabyte
• D. None of these

Explanation: Among the listed units, a megabyte is smaller than a gigabyte and a terabyte. The usual order is megabyte, gigabyte, then terabyte.

225. Which of the following is not a binary number?

• A. 001
• B. 101
• C. 202
• D. 110

Explanation: Binary numbers may contain only the digits 0 and 1. The number 202 contains the digit 2, so it is not binary.

226. A computer system that is old and perhaps not satisfactory is referred to as a(n)____________?

• A. Ancient system
• B. Historical system
• C. Age old system
• D. Legacy system

Explanation: A legacy system is an older computer system that an organisation continues to use, even when it may be outdated or difficult to maintain. “Ancient system” is not the standard technical term.

227. ASCII is a coding system that provides_____________?

• A. 256 different characters
• B. 512 different characters
• C. 1024 different characters
• D. 128 different characters

Explanation: Standard ASCII uses 7 bits, allowing 2⁷ = 128 character codes. The 256-character version is extended ASCII, not basic ASCII.

228. To access properties of an object, the mouse technique to use is_____________?

• A. Dragging
• B. dropping
• C. right-clicking
• D. shift-clicking

Explanation: Right-clicking an object normally opens its shortcut or context menu, which includes the Properties command. Dragging and dropping move objects rather than display their settings.

229. A person who used his or her expertise to gain access to other people's computers to get information illegally or do damage is a____________?

• A. Hacker
• B. spammer
• C. instant messenger
• D. programmer

Explanation: A hacker uses computer expertise to gain unauthorised access, potentially stealing information or causing damage. A programmer writes software, whereas a spammer sends unsolicited messages.

230. Why is it unethical to share copyrighted files with your friends?

• A. It is not unethical, because it is legal.
• B. It is unethical because the files are being given for free.
• C. Sharing copyrighted files without permission breaks copyright laws.
• D. It is not unethical because the files are being given for free.Company News

Explanation: Copyright protects the creator’s control over copying and distribution, so sharing files without permission can violate copyright law. Giving the files away for free does not remove that restriction.