This quiz covers core computer concepts, hardware architecture, and microprocessors. Attempt each question, then click “Show answer” to reveal the correct option and a brief explanation.
1. Which of the following best describes a microprocessor?
Correct answer: B. A programmable integrated circuit that performs arithmetic and logic operations — Essentially, it is the CPU implemented on a single chip.
2. The basic components of a von Neumann architecture computer include:
Correct answer: A. CPU, memory, I/O, and a single shared bus — Program instructions and data share the same memory and bus.
3. Which of the following is NOT a function of the CPU?
Correct answer: D. Long-term storage of data — That is the function of non-volatile storage like hard disks or SSDs, not the CPU.
4. In microprocessors, the “clock speed” is usually measured in:
Correct answer: B. Hertz — It represents the number of cycles per second, indicating how fast the processor can execute basic operations.
5. Which of the following statements about RAM is correct?
Correct answer: B. RAM is volatile — It temporarily stores data and instructions needed by the CPU during operation.
6. The ALU (Arithmetic Logic Unit) in a microprocessor is responsible for:
Correct answer: C. Performing arithmetic and logic operations — The ALU is the computational core of the CPU.
7. The control unit (CU) of a microprocessor primarily:
Correct answer: B. Decodes instructions and coordinates activities — The CU directs the flow of data between CPU, memory, and I/O devices.
8. In the context of microprocessors, the term “word size” refers to:
Correct answer: B. Number of bits processed at once — Larger word size typically allows for more powerful processing and larger addressable memory.
9. Which of the following is an example of an 8-bit microprocessor widely used in early computers?
Correct answer: C. Intel 8080 — It is a classic 8-bit microprocessor; 8086 and 80386 are 16-bit and 32-bit respectively.
10. The term “bus” in computer architecture refers to:
Correct answer: B. A set of physical lines for data transfer — Common bus types include data bus, address bus, and control bus.
11. The “address bus” in a microprocessor is primarily used to:
Correct answer: B. Carry addresses of memory locations — Its width determines the maximum directly addressable memory.
12. Which of the following is true about RISC (Reduced Instruction Set Computer) architecture?
Correct answer: B. Small, optimized instruction set — RISC designs focus on simplicity and efficiency in instruction execution.
13. In contrast to RISC, CISC (Complex Instruction Set Computer) processors:
Correct answer: B. Large, complex instruction set — CISC processors (like traditional x86) can perform complex tasks in single instructions.
14. “Cache memory” in a computer system is primarily used to:
Correct answer: B. Bridge the speed gap — Cache is small, fast memory that speeds up access to frequently used instructions and data.
15. Which of the following best describes a “multi-core” processor?
Correct answer: B. Single chip with multiple cores — Each core can execute instructions, enabling parallel processing.
16. Which of the following is NOT an input device?
Correct answer: D. Monitor — Monitors are output devices that display information.
17. Which of the following is an example of system software?
Correct answer: C. Operating system — It manages hardware and provides services for application software.
18. In the context of microprocessors, “instruction set” refers to:
Correct answer: B. Collection of operations — The instruction set defines the commands a processor understands at machine level.
19. Which of the following is the correct sequence of steps in the “fetch–decode–execute” cycle of a microprocessor?
Correct answer: C. Fetch → Decode → Execute — The CPU fetches an instruction, decodes it, and then executes it.
20. In modern personal computers, which of the following typically stores the BIOS/firmware?
Correct answer: B. ROM/Flash memory — Firmware such as BIOS/UEFI is stored in non-volatile memory on the motherboard.
