All Free Computer Science and IT MCQs with Answers

401. Which of the following is a secondary memory device?

• A. Keyboard
• B. Disk
• C. ALU
• D. All of the above

Explanation: A disk stores data for long-term use and is therefore secondary memory. A keyboard is an input device and the ALU is a CPU component, so neither is memory.

402. Microprocessors can be used to make________________?

• A. Computer
• B. Digital systems
• C. Calculators
• D. All of the above

Explanation: A microprocessor is a programmable processing unit used in computers, calculators, and many other digital systems. Thus, all three listed applications are valid.

403. Memory unit is one part of____________?

• A. Input device
• B. Control unit
• C. Output device
• D. Central Processing Unit

Explanation: In the traditional computer organization model, the CPU contains the arithmetic and logic unit, control unit, and memory unit or registers. Therefore, the memory unit is treated as part of the central processing unit here.

404. Which of the following software could assist someone who cannot use their hands for computer input?

• A. Video conferencing
• B. Speech recognition
• C. Audio digitizer
• D. Synthesizer

Explanation: Speech-recognition software converts spoken commands or dictated words into computer input, allowing a user to work without using their hands. The other choices do not provide a direct hands-free input method.

405. What is the name given to those applications that combine text, sound, graphics, motion video, and/or animation?

• A. Motionware
• B. Anigraphics
• C. Videoscapes
• D. Multimedia
• E. None of these Word Processing Software

Explanation: Multimedia combines several media types, such as text, sound, graphics, animation, and video, in one application or presentation. The other terms are not the standard general name for this combination.

406. A(n)_____________is a set of programs designed to manage the resources of a computer, including starting the computer, managing programs, managing memory and coordinating tasks between input and output devices?

• A. application suite
• B. compiler
• C. input/output system
• D. Operating system
• E. None of these

Explanation: An operating system manages hardware resources, memory, programs, input/output devices, and the startup process. A compiler translates programs, while an application suite contains user applications rather than managing the whole computer.

407. Which of these is a point and draw device?

• A. Mouse
• B. Scanner
• C. Printer
• D. CD-ROM

Explanation: A mouse is a point-and-draw or pointing device used to select, move, and manipulate objects on screen. A scanner captures images, a printer produces output, and a CD-ROM stores data.

408. _______________devices convert human understandable data and programs into a form that the computer can process?

• A. Printing
• B. Output
• C. Solid state
• D. Input

Explanation: Input devices such as keyboards and scanners translate human-entered data into machine-readable signals. Output devices perform the reverse process by presenting computer-processed information to users.

409. _____________is a windows utility program that locates and eliminates unncessary fragments and rearranges filed and unused disk space to optimize operations?

• A. Backup
• B. Disk cleanup
• C. Disk Defragmenter
• D. Restore

Explanation: Disk Defragmenter rearranges fragmented file parts and consolidates free space, improving access efficiency on traditional hard disks. Disk Cleanup removes temporary and unnecessary files but does not defragment the drive.

410. To display the contents of a folder in Windows Explorer you should:

• A. click on it
• B. collapse it
• C. name it
• D. give it a password
• E. None of these Company News

Explanation: Selecting or opening a folder in Windows Explorer displays the files and subfolders it contains. The other options do not provide access to the folder contents.