All Free Computer Science and IT MCQs with Answers

341. Which is a non-volatile memory ?

• A. ROM
• B. RAM
• C. BIOS
• D. None of Above

Explanation: ROM retains its contents even when power is removed, so it is non-volatile memory. RAM is volatile because its contents normally disappear when power is lost.

342. A single point on a computer screen is called__________?

• A. Cell
• B. Bit
• C. Pixel
• D. Element

Explanation: A pixel is the smallest addressable picture element on a digital display, and an image is formed from many such pixels. A bit is a data unit, not a screen point.

343. A normal CD-ROM usualy can store up to data?

• A. 680 KB
• B. 680 Bytes
• C. 680 MB
• D. 60 GB

Explanation: A standard CD-ROM commonly stores about 650 to 700 MB, so 680 MB is the matching option. The other choices are either far too small or far too large for a normal CD-ROM.

344. Digitizer also referred as_________?

• A. Digital audio player
• B. Digital video editor
• C. Input Device
• D. None of these

Explanation: A digitizer converts physical drawings, handwriting, or other analogue information into digital data, so it is classified as an input device. The other options describe media software or hardware categories unrelated to digitizers.

345. Virtual Memory is typically located in ?

• A. RAM
• B. CPU
• C. Hard Drive
• D. Flash Memory

Explanation: Virtual memory uses space on a hard drive or SSD to extend the apparent capacity of RAM. It is not physically stored in the CPU or ordinary RAM, although RAM works with it during execution.

346. QuickTime is a _______ ?

• A. Website
• B. Search Engine
• C. Media Player
• D. Language

Explanation: QuickTime is multimedia software from Apple that can play and handle audio and video content. It is therefore classified here as a media player, not a website or search engine.

347. CRT is the technology used in a:___________?

• A. Mouse
• B. Monitor
• C. Trojan Horse
• D. None of these

Explanation: CRT, or Cathode Ray Tube, is the display technology used in older monitors and television screens. A mouse is an input device, while a Trojan horse is malware.

348. Which is not the layer of Operating System?

• A. Kernal
• B. Shell
• C. Application Program
• D. Critical Section

Explanation: The kernel, shell, and application programs are commonly described as parts or layers of an operating-system environment. A critical section is a concurrent-programming region that accesses shared data, not an operating-system layer.

349. which type of software controls your application software and manages how your hardware devices work together?

• A. System Software
• B. Operating System
• C. Utility Software
• D. Application Software

Explanation: The operating system manages hardware resources and provides the platform on which application software runs. Utility software performs supporting maintenance tasks, but it does not coordinate the whole computer in this way.

350. Which company is the biggest player in the microprocessor industry?

• A. Motorola
• B. IBM
• C. Intel
• D. AMD

Explanation: Intel has historically held the largest share of the general-purpose microprocessor market, especially for desktop and server CPUs. AMD is a major competitor, while Motorola and IBM are not the leading current players in this market.