Computers and Microprocessors Quiz – Set 6
Attempt each question, then click “Show answer” to reveal the correct option and a brief explanation.
1. In computer graphics, the term “resolution” primarily refers to:
Correct answer: B. Number of pixels — For example, 1920×1080 describes horizontal and vertical pixel counts.
2. “Refresh rate” of a monitor is measured in:
Correct answer: A. Hertz — It indicates how many times per second the display is updated.
3. In a typical microprocessor, which register holds the address of the current instruction being executed?
Correct answer: C. Program Counter — It points to the next instruction and is updated as execution proceeds.
4. Which of the following BEST describes “context switching” in operating systems?
Correct answer: B. Saving and restoring CPU state — The OS saves registers, stack pointer, etc., for preemptive multitasking.
5. Which storage medium is based on magnetic recording?
Correct answer: C. HDD — It uses spinning magnetic platters to store data.
6. Which of the following is TRUE about static RAM (SRAM) compared to dynamic RAM (DRAM)?
Correct answer: B. Faster and more expensive — SRAM is typically used in caches, DRAM in main memory.
7. In a computer system, the “chipset” on a motherboard primarily:
Correct answer: B. Connectivity and control — The chipset manages communication between core components.
8. Which of the following is an example of a high-level programming language?
Correct answer: C. C++ — High-level languages are more abstract and human-readable than assembly or machine code.
9. Which of the following is NOT a characteristic of a “real-time operating system” (RTOS)?
Correct answer: D. Always maximizes throughput — RTOS focuses on meeting deadlines and predictability, sometimes sacrificing throughput.
10. Which of the following communication media generally offers the highest data transmission speed?
Correct answer: C. Optical fiber — It supports very high bandwidth and long-distance communication.
11. Which of these is the correct binary representation of the hexadecimal number “3F”₁₆?
Correct answer: A. 0011 1111₂ — 3 → 0011, F → 1111.
12. In a paged virtual memory system, a “page fault” occurs when:
Correct answer: B. Page not in RAM — The OS must load it from secondary storage.
13. Which of the following security practices helps protect a computer from malware?
Correct answer: B. Strong passwords and up-to-date antivirus — Plus safe browsing and regular patching.
14. Which of the following is a characteristic feature of “CISC” processors?
Correct answer: B. Many complex instructions — CISC aims to do more work per instruction.
15. In digital logic, which gate can be used as a “universal gate” to implement any Boolean function?
Correct answer: C. NAND gate (and NOR) — Either can be combined to form any other gate.
16. Which of the following best describes the “fetch” step in the fetch–decode–execute cycle?
Correct answer: B. Retrieves the next instruction — Then it is decoded and executed.
17. Which of the following file extensions is typically associated with executable programs in Windows?
Correct answer: B. .exe — It denotes an executable binary file.
18. In networking, which topology connects all devices to a single central cable, with terminators at both ends?
Correct answer: C. Bus topology — All nodes share a common backbone cable.
19. Which of these is an example of an application of microprocessors in everyday life?
Correct answer: B. Everyday devices — Microprocessors and microcontrollers are embedded in many consumer products.
20. What is the main purpose of a “heat sink” attached to a CPU?
Correct answer: C. Dissipate heat — Heat sinks (often with fans) help maintain safe operating temperatures.
