UGC NET · PAPER 2
UGC NET Paper 2 Computer Science – Unit 2: Computer System Architecture PYQ (22 June 2026)
Q54. Consider the following binary codes:
What is the maximum Hamming Distance value for all pairs of above mentioned codes?
| C₁ | 00000 |
| C₂ | 01011 |
| C₃ | 10101 |
- 2
- 3
- 4
- 5
Q66. The average memory access time is 130 ns and average time of cache memory is 100 ns. With 75% hit ratio, the average time to access a word is?
- 130 ns
- 150 ns
- 132.5 ns
- 107.5 ns
Q71. Simplify the following Boolean expression using 4-variables K-map.
F(A, B, C, D) = Σ m(3, 6, 7, 11, 12, 13, 14, 15)
F(A, B, C, D) = Σ m(3, 6, 7, 11, 12, 13, 14, 15)
- A̅B + B̅C + C̅D̅
- A̅B + CD̅ + AB̅
- AB + BC + CD
- CD + AC̅ + BD
Q78. Which of the following is memory interleaving?
- Layering of memory stacks one above the other
- Hierarchy of different type of memories
- Division of memory into multiple modules, allowing the CPU to access multiple modules simultaneously
- Combining different type of memories
Q95. Arrange the following in terms of their capacity from smallest to largest:
A. L3 Cache
B. L1 Cache
C. CPU Register
D. L2 Cache
Choose the correct answer from the options given below:
A. L3 Cache
B. L1 Cache
C. CPU Register
D. L2 Cache
Choose the correct answer from the options given below:
- C, D, B, A
- C, A, B, D
- C, B, D, A
- A, C, D, B
Q104. The combination of selection lines for sending the input I14 to output in the following multiplexer is? (A 64×1 MUX with inputs I0...I63 and selection lines S5, S4, S3, S2, S1, S0 is shown, driving a single output.)
- 001111
- 110000
- 111100
- 001110
Q110. Match the LIST-I with LIST-II
Choose the correct answer from the options given below:
| LIST-I | LIST-II |
|---|---|
| A. FDM | I. has four possible Minterms |
| B. Digital Circuits | II. Frequency Division Multiplexing |
| C. A Two-Variable function | III. Universal flip-flop |
| D. J-K flip-flop | IV. Combinational or Sequential |
- A-II, B-I, C-IV, D-III
- A-II, B-IV, C-I, D-III
- A-II, B-III, C-I, D-IV
- A-II, B-I, C-III, D-IV
Q113. For sending input I6 on the output line of a 8×1 multiplexer, (an 8×1 MUX with inputs I0...I7, selection lines S2, S1, S0, driving output O/P, is shown) which of the following will represent the combination of selection lines?
- 001
- 100
- 110
- 111
Q127. The term "double buffered" is used in which of the following?
- Synchronous Communication Interface
- Asynchronous Communication Interface
- Addressing Mode
- Serial Communication
Q137. What does "Amdahl's Law" describe in the context of parallel processing?
- Maximum speedup achievable, considering serial and parallel portions of a program
- The efficiency of message passing in a distributed memory system
- Computational efficiency of a parallel algorithm
- The reliability of a fault tolerant system