UGC NET · PAPER 2
UGC NET Paper 2 Computer Science – Unit 2: Computer System Architecture PYQ (June 2023)
Q32. What is the 4+4-bit binary fixed-point (two's complement) equivalent of −(3.72)₁₀?
- 0011.1100
- 0011.1010
- 1100.0100
- 0011.1011
Q35. Let ⊕ denote XOR, and 1 and 0 the binary constants. F(P, Q) = ((1 ⊕ P) ⊕ (P ⊕ Q)) ⊕ ((P ⊕ Q) ⊕ (Q ⊕ 0)). Which of the following is equivalent to F?
- P ⊕ Q
- P + Q
- complement of (P + Q)
- complement of (P ⊕ Q)
Q62. A processor chip is used for an application in which 30% of execution time is spent on floating-point addition. For the new model, the design team redesigns the floating-point adder to make it twice as fast. What is the maximum possible speed-up from this redesign?
- 2.0
- 1.06
- 1.18
- 2.5
Q87. A 256 Mb DRAM is organised as a 32M × 8 memory externally and as a 16K × 16K square array internally. Each row must be refreshed at least once every 50 ms, and refreshing one row takes 100 ns. What fraction of the total memory bandwidth is lost to refresh cycles?
- 6.6%
- 3.3%
- 9.9%
- 4.3%