Computer Organization and Architecture MCQs Set-2
This section contains more frequently asked Computer Architecture and Organization MCQs in the various University Level and Competitive Examinations.
1. (2FAOC) 16 is equivalent to
- (195 084)10
- (001011111010 0000 1100)2
- Both (A) and (B)
- None of these
✅ Correct Answer: B. (001011111010 0000 1100)2
2. The average time required to reach a storage location in memory and obtain its contents is called the
- seek time
- turnaround time
- access time
- transfer time
✅ Correct Answer: C. access time
3. Which of the following is not a weighted code?
- Decimal Number system
- Excess 3-cod
- Binary number System
- None of these
✅ Correct Answer: B. Excess 3-cod
4. The idea of cache memory is based
- on the property of locality of reference
- on the heuristic 90-10 rule
- on the fact that references generally tend to cluster
- all of the above
✅ Correct Answer: A. on the property of locality of reference
5. Which of the following is lowest in memory hierarchy?
- Cache memory
- Secondary memory
- Registers
- RAM
- None of these
✅ Correct Answer: B. Secondary memory
6. The addressing mode used in an instruction of the form ADD X Y, is
- Absolute
- indirect
- index
- none of these
✅ Correct Answer: C. index
7. If memory access takes 20 ns with cache and 110 ns with out it, then the ratio (cache uses a 10 ns memory) is
- 0.93
- 0.9
- 0.88
- 0.87
✅ Correct Answer: B. 0.9
8. In a memory-mapped I/O system, which of the following will not be there?
- LDA
- IN
- ADD
- OUT
✅ Correct Answer: A. LDA
9. In a vectored interrupt.
- the branch address is assigned to a fixed location in memory.
- the interrupting source supplies the branch information to the processor through an interrupt vector.
- the branch address is obtained from a register in the processor
- none of the above
✅ Correct Answer: B. the interrupting source supplies the branch information to the processor through
an interrupt vector.
10. Von Neumann architecture is
- SISD
- SIMD
- MIMD
- MISD
✅ Correct Answer: A. SISD