UGC NET Computer Science Computer Architecture Previous Year Question Paper and Solution with PDF

UGC NET Computer Science Previous Year Questions (PYQs)

UGC NET Computer Science Computer Architecture PYQ

Qus : 1 UGC NET Computer Science PYQ

Which of the following statements are true?

A. In the write-through policy, only the cache is updated

B. In the write-back policy, both cache and main memory are updated

C. Cache coherence problems exist in multiprocessors with private caches because of the need to share writable data

D. Cache coherence problem can be solved by means of hardware-only scheme

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UGC NET Computer Science UGC NET PYQ UGC NET Computer Science UGC NET Computer Science 26 June 2025 (Paper II) PYQ

Solution

A is false — In the write-through policy, both cache and main memory are updated simultaneously.

B is true — In write-back policy, data is first written to cache and later updated in main memory when replaced.

C is true — Cache coherence arises in multiprocessors with private caches that share writable data.

D is false — Cache coherence solutions usually need both hardware and software support, not hardware-only.

Qus : 2 UGC NET Computer Science PYQ

The right sequence of suboperations that are performed in arithmetic pipeline is –

A. Align the mantissas

B. Add or subtract the mantissas

C. Normalize the result

D. Compare the exponents

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UGC NET Computer Science UGC NET PYQ UGC NET Computer Science UGC NET Computer Science 26 June 2025 (Paper II) PYQ

Solution

The correct order of floating-point arithmetic steps is —

First, compare the exponents (D) to determine alignment.
Then, align the mantissas (A) by shifting.
Next, add or subtract the mantissas (B).
Finally, normalize the result (C) to adjust exponent and mantissa.

Hence, the sequence is D → A → B → C.

Qus : 3 UGC NET Computer Science PYQ

Right sequence of CPU program to input data:

A. Read status register

B. Check flag bit

C. Read data register

D. Transfer data to memory

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UGC NET Computer Science UGC NET PYQ UGC NET Computer Science UGC NET Computer Science 26 June 2025 (Paper II) PYQ

Solution

Poll status → verify ready → read data → store to memory.

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UGC NET Computer Science Previous Year Questions (PYQs)

UGC NET Computer Science Computer Architecture PYQ

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