All Free Computer Science and IT MCQs with Answers

331. Which mechanism is used by the computer virus 'worm' to duplicate itself?

• A. Swap
• B. Spawn
• C. Increment
• D. Swarm

Explanation: A worm can replicate by spawning new copies of itself, often without attaching to another file. Swap concerns memory or storage exchange, not virus replication.

332. in RAM memory, DDR stands for ?

• A. Double sided RIMM
• B. Double data rate
• C. Digital data rate
• D. Dynamic data rate

Explanation: DDR means Double Data Rate because the memory transfers data on both clock edges, increasing the transfer rate without doubling the clock frequency. The other expansions are not standard memory terminology.

333. How many pins in DDR3 Memory?

• A. 240
• B. 128
• C. 195
• D. 228Fun & Trivia

Explanation: A standard desktop DDR3 DIMM has 240 pins. Laptop DDR3 SO-DIMMs use a different package and pin count, but that distinction is not specified here.

334. USB is _____ type of storage device.

• A. Auxillary
• B. Primary
• C. Secondary
• D. Tertiary

Explanation: A USB flash drive is non-volatile secondary storage because it retains data when power is removed and is used for long-term data storage. Primary storage refers mainly to working memory such as RAM.

335. After 'PROM' is programmed, we can only ____ the information?

• A. Read
• B. Write
• C. Read and Write
• D. Remove

Explanation: PROM is programmable read-only memory, so after it is programmed its stored contents can normally only be read. Unlike RAM, it cannot be rewritten through ordinary operation.

336. Computer Monitor is also known as __________?

• A. DVU
• B. VUD
• C. VDU
• D. None of these

Explanation: A computer monitor is called a VDU, meaning Visual Display Unit. DVU and VUD reverse the standard abbreviation's letters.

337. Printers and Monitors are common forms of ______?

• A. Input units
• B. Output Units
• C. Storage Unit
• D. Processing Unit

Explanation: Printers and monitors present processed information to the user, so both are output units. Input units send data into the computer, while storage and processing units perform different functions.

338. SIMM Stands For ______?

• A. Single Inline Memory Module
• B. Single Identify Memory Module
• C. Secret Internet Memory module
• D. None of them

Explanation: SIMM expands to Single Inline Memory Module, a type of memory module whose contacts provide a single set of electrical connections.

339. "The one program running at all times on the computer" is the:

• A. Kernel
• B. Software
• C. Windows
• D. Task Manager

Explanation: The kernel is the core part of an operating system and remains active while the computer operates, managing hardware and system resources. Task Manager is only a utility used to view or control running tasks.

340. A program that acts as an intermediary between a user of a computer and the computer hardware:

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

Explanation: An operating system mediates between users, application programs and computer hardware, managing resources such as memory, files and input/output devices.