Free Computer Fundamentals MCQs with Answers

241. ___________is the key we use to run the selected command?

• A. SHIFT
• B. TAB
• C. ENTER
• D. CTRL

Explanation: Enter confirms or runs a selected command, submits a choice, and often activates the focused button. Tab only moves the focus, while Shift and Ctrl modify other keys or actions.

242. ___________ is the key to close a selected drop -down list; cancel a command and close a dialog box.

• A. TAB
• B. SHIFT
• C. ESC
• D. F10

Explanation: Esc cancels the current operation, closes an open drop-down list, or dismisses a dialog box. Tab changes focus and F10 generally activates menu-bar focus.

243. An area of a computer that temporarily holds data waiting to be processed is___________?

• A. CPU
• B. Memory
• C. Storage
• D. File

Explanation: Memory, especially RAM, temporarily holds data and instructions waiting for processing by the CPU. Storage keeps data for longer periods, while the CPU performs the processing.

244. The instructions that tell a computer how to carry out the processing tasks are referred to as computer___________?

• A. programs
• B. processors
• C. input devices
• D. memory modules

Explanation: Computer programs are sets of instructions that direct the computer's processing tasks. A processor executes these instructions, but it is not itself the instructions.

245. 1 Byte =___________?

• A. 8 bits
• B. 4 bits
• C. 2 bits
• D. 9 bits

Explanation: A byte is the standard grouping of 8 binary bits. Four bits form a nibble, not a byte.

246. RAM stands for___________?

• A. Random origin money
• B. Random only memory
• C. Read only memory
• D. Random access memory

Explanation: RAM expands to Random Access Memory, because any memory location can be accessed directly in roughly equal time. Read Only Memory is abbreviated ROM, not RAM.

247. Which of the following is also known as brain of computer?

• A. Control unit
• B. Central Processing unit
• C. Arithmetic and language unit
• D. Monitor

Explanation: The CPU is called the computer's brain because it executes instructions and coordinates processing. The control unit is only one component of the CPU, while the monitor is an output device.

248. Who is the Current CEO of Microsoft?

• A. Babbage
• B. Bill Gates
• C. Bill Clinton
• D. Satya Nadella

Explanation: Satya Nadella is Microsoft's current CEO, having succeeded Steve Ballmer in 2014. Bill Gates co-founded Microsoft but is not its current chief executive.

249. DOS stands for____________?

• A. Disk Operating System
• B. Disk operating session
• C. Digital Operating System
• D. Digital Open system

Explanation: DOS stands for Disk Operating System, an operating system family that manages disk-based files and programs. The alternatives expand the abbreviation incorrectly.

250. A self replicating program, similar to a virus which was taken from a 1970s science fiction novel by John Bruner entitled the Shockwave Rider is__________?

• A. Bug
• B. Vice
• C. Lice
• D. Worm

Explanation: A worm is a self-replicating program that can spread between systems without needing to attach to another program. The term was popularised by John Brunner's 1975 science-fiction novel The Shockwave Rider.