Free Hardware and Software MCQs with Answers

121. Touch Screen is___________?

• A. Input device
• B. Output device
• C. Both A & B above
• D. None of these

Explanation: A touch screen displays information like a monitor and also accepts touch commands like an input device, so it performs both functions. This dual role distinguishes it from an ordinary monitor.

122. Cathode Ray Tube is a form of__________?

• A. Keyboard
• B. Mouse
• C. Monitor
• D. Mother board

Explanation: A cathode-ray tube is the display technology used in traditional CRT monitors. It is not a keyboard, mouse, or motherboard.

123. To prevent the loss of data during power failures, use a(n)_____________?

• A. Encryption program
• B. Surge protector
• C. Firewall
• D. UPS

Explanation: A UPS supplies temporary backup power when the main supply fails, allowing work to be saved and systems to shut down safely. A surge protector guards against voltage spikes but does not provide power during an outage.

124. Which of the following is not a storage medium?

• A. Hard disk
• B. Flash drive
• C. DVD
• D. scanner

Explanation: A hard disk, flash drive and DVD store data, whereas a scanner captures documents or images and sends them to a computer. Therefore, the scanner is not a storage medium.

125. Which of the following does not store data permanently?

• A. ROM
• B. RAM
• C. Floppy Disk
• D. Hard Disk

Explanation: RAM is volatile memory, so its contents disappear when power is removed. ROM, floppy disks and hard disks retain data without continuous power.

126. When a computer is switched on, the booting process performs___________?

• A. Integrity Test
• B. Power-On Self-Test
• C. Correct Functioning Test
• D. Reliability Test

Explanation: When power is switched on, the firmware performs the Power-On Self-Test, or POST, to check essential hardware such as memory and the keyboard. It then begins loading the operating system.

127. Which part of the computer is directly involved in executing the instructions of the computer program?

• A. The scanner
• B. The main storage
• C. The secondary storage
• D. The processor

Explanation: The processor, or CPU, fetches, decodes and executes program instructions. Storage devices hold instructions, but they do not execute them.

128. A DVD is an example of a (n)___________?

• A. hard disk
• B. optical disc
• C. output device
• D. solid-state storage device

Explanation: A DVD stores data using laser-read pits on a disc, so it is an optical disc. It is not a hard disk, printer-like output device, or solid-state storage.

129. Reusable optical storage will typically have the acronym________?

• A. CD
• B. DVD
• C. ROM
• D. RW

Explanation: RW stands for ReWritable, indicating that an optical disc can be erased and recorded again. CD and DVD identify disc formats, while ROM means read-only memory.

130. Codes consisting of lines of varying widths or lengths that are computer-readable are known as__________?

• A. an ASCII code
• B. a magnetic tape
• C. an OCR scanner
• D. a bar code

Explanation: A barcode represents data through machine-readable lines or patterns of varying widths. ASCII is a character code, and an OCR scanner is a device rather than the code itself.