UGC NET · PAPER 2
UGC NET Paper 2 Computer Science – Unit 2: Computer System Architecture PYQ (December 2022 Shift 2)
Q5. Which one of the following types of memory is the fastest?
- Cache Memory
- Register Memory
- Main Memory
- Secondary Memory
Q6. The memory size for n address lines and m data lines is given by
- 2m × n
- m × n2
- 2n × m
- n × m2
Q7. Simplify the following using a K-map: F(A, B, C, D) = Σ(0, 2, 5, 7, 8, 10, 13, 15)
- BD + B′D′
- AC + A′C′
- BC + B′C′
- AD + A′D′
Q8. Consider an unpipelined machine with 10 ns clock cycles which uses four cycles for ALU operations and branches, and five cycles for memory operations. The relative frequencies of these operations are 40%, 20% and 40% respectively. Due to clock skew and setup, the pipelined machine adds 1 ns overhead to the clock. How much speedup is observed in the instruction execution rate when a pipelined machine is considered?
- 2 times
- 4 times
- 6 times
- 8 times
Q43. Which of the statements is not true in regard to virtual memory?
- The main objective of using virtual memory is to increase the effective capacity of the memory system
- Size of the program can be as large as the size of the secondary memory
- Program and data are stored in the secondary memory
- None of these
Q44. Which of the following is/are true for Dynamic RAM (DRAM)?
1. It is slower than static RAM (SRAM)
2. Packing density is higher than static RAM (SRAM)
3. It is faster than static RAM (SRAM)
4. It requires data refreshing
Choose the correct answer from the options given below:
1. It is slower than static RAM (SRAM)
2. Packing density is higher than static RAM (SRAM)
3. It is faster than static RAM (SRAM)
4. It requires data refreshing
Choose the correct answer from the options given below:
- 1, 2 and 4 only
- 1, 2 and 3 only
- 3 and 4 only
- 2 and 4 only
Q45. Which of the following statements is/are false?
1. The processor has direct access to both primary and secondary memory
2. Primary memory stores the active instructions and data for the program being executed on the processor
3. Secondary memory is used as a backup memory
4. A memory system is implemented on a single-level memory
Choose the correct answer from the options given below:
1. The processor has direct access to both primary and secondary memory
2. Primary memory stores the active instructions and data for the program being executed on the processor
3. Secondary memory is used as a backup memory
4. A memory system is implemented on a single-level memory
Choose the correct answer from the options given below:
- 1 and 2 only
- 2 and 3 only
- 1, 2 and 3 only
- 1 and 4 only
Q67. Match List I with List II (8085 addressing modes).
Choose the correct answer from the options given below:
Choose the correct answer from the options given below:
| List I | List II |
|---|---|
| a. Direct addressing | I. MVI A, FFH |
| b. Indirect addressing | II. MOV A, B |
| c. Register addressing | III. STA FFFFH |
| d. Immediate addressing | IV. MOV A, M |
- a-I, b-II, c-III, d-IV
- a-II, b-III, c-IV, d-I
- a-III, b-IV, c-II, d-I
- a-IV, b-III, c-I, d-II
Q77. The correct sequence in the fetch–execute cycle is ______.
I. Decode
II. Fetch
III. Execute
I. Decode
II. Fetch
III. Execute
- I-II-III
- II-III-I
- III-II-I
- II-I-III