All Free Computer Science and IT MCQs with Answers

211. _________computer are of large size?

• A. Micro
• B. Mainframe
• C. Super
• D. Mini

Explanation: Mainframe computers are large, powerful systems designed to serve many users and process substantial workloads. Supercomputers are generally identified by extreme speed and scientific performance rather than this basic size classification.

212. ____________computer is a medium sized computer?

• A. Micro
• B. Mainframe
• C. Super
• D. Mini

Explanation: Mini computers are traditionally described as medium-sized systems, positioned between microcomputers and mainframes. A microcomputer is smaller, while a mainframe is larger.

213. ____________computer is small general purpose micro computer, but larger than portable computer?

• A. Hybrid
• B. Digital
• C. Desktop
• D. Laptop

Explanation: A desktop is a general-purpose microcomputer intended to remain on a desk and is typically larger and less portable than a laptop or other portable computer. Hybrid and digital describe types of processing rather than this form factor.

214. _____________computers operates essentially by counting?

• A. Portable computer
• B. Hybrid computer
• C. Analog computer
• D. Digital computer

Explanation: Digital computers process information using discrete values, especially binary digits, and therefore operate by counting. Analog computers work with continuously varying physical quantities.

215. The first electronic computer was developed by____________?

• A. J.V. Attansoff
• B. Bill Gates
• C. Simur Cray
• D. Winton Serf

Explanation: John Vincent Atanasoff, with Clifford Berry, developed the Atanasoff-Berry Computer, one of the first electronic digital computers. The option spells Atanasoff incorrectly, but it clearly refers to him.

216. The thing that eventually terminates a worm virus is a lack of:

• A. Memory or disk space.
• B. Time.
• C. CD drives space.
• D. CD-RW.

Explanation: A worm continuously copies itself and consumes available memory or disk space. It eventually stops spreading when these resources are exhausted.

217. What type of virus uses computer hosts to reproduce itself?

• A. Time bomb
• B. Worm
• C. Melissa virus
• D. Macro virus

Explanation: A worm reproduces by using computers connected to a network as hosts and then spreading to other systems. A time bomb waits for a condition, while a macro virus infects documents.

218. An intentionally disruptive program that spreads from program to program or from disk to disk is known as a_____________?

• A. Trojan horse.
• B. Virus.
• C. Time bomb.
• D. Time-related bomb sequence.

Explanation: A virus is intentionally disruptive code that attaches to or spreads through programs and storage media. A Trojan horse disguises its harmful behavior as a useful program rather than primarily spreading this way.

219. Malicious software is known as____________?

• A. Badware.
• B. Malware.
• C. Maliciousware.
• D. Illegalware

Explanation: Malware is the standard term formed from “malicious software,” covering viruses, worms, Trojan horses, spyware and similar threats. The other terms are not standard computing terminology.

220. Collecting personal information and effectively posing as another individual is known as the crime of_____________?

• A. Spooling.
• B. Identity theft.
• C. Spoofing.
• D. Hacking.

Explanation: Identity theft involves obtaining personal information and using it to impersonate the victim. Spoofing is the broader act of pretending to be a trusted person or system, often online.