UGC NET · PAPER 2
UGC NET Paper 2 Computer Science – Unit 2: Computer System Architecture PYQ (September 2022)
Q3. Consider a memory system with addresses spaced at a distance of m (stride), T = bank cycle time and n = number of banks. Then the average data access time per word in a synchronous (interleaved) organisation is
- t = m·T/n for m ≪ n; t = T for m ≫ n
- t = T/n for m ≪ n; t = T for m ≫ n
- t = m·T for m ≪ n; t = T for m ≫ n
- t = m·T for m ≪ n; t = m/T for m ≫ n
Q4. In a multiprocessor system, the crossbar switch interconnection network is an example of a
- Non-blocking network
- Blocking network
- Network that varies from connection to connection
- Recurrent network
Q5. The representation of the 4-bit code 1101 as a 7-bit even-parity Hamming code is
- 1010101
- 1111001
- 1011101
- 1110000
Q6. The number of gate inputs required to realise the expression ABC + AB′CD + EF′ + AD is
- 12
- 13
- 14
- 15
Q7. Consider a logic circuit with 8 input lines (D0, D1, …, D7) and 3 output lines (A0, A1, A2) specified by:
A2 = D4 + D5 + D6 + D7
A1 = D2 + D3 + D6 + D7
A0 = D1 + D3 + D5 + D0
where + is logical OR. This circuit is a(n)
A2 = D4 + D5 + D6 + D7
A1 = D2 + D3 + D6 + D7
A0 = D1 + D3 + D5 + D0
where + is logical OR. This circuit is a(n)
- 3 × 8 multiplexer
- Decimal to BCD converter
- Octal to binary encoder
- Priority encoder
Q8. The total storage capacity of a floppy disk having 80 tracks and storing 128 bytes/sector is 163,840 bytes. How many sectors does this disk have (per track)?
- 27
- 2048
- 4K
- 16
Q9. In a cache memory, if the address has 9 bits in the tag field and 12 bits in the index field, the sizes of main memory and cache memory would be, respectively,
- 2K, 4K
- 1024K, 2K
- 4K, 2048K
- 2048K, 4K
Q50. A 4-stage pipeline has stage delays of 150, 120, 160 and 140 ns. Registers between the stages have a delay of 5 ns. Assuming a constant clocking rate, the total time required to process 1000 data items is
- 160.5 μs
- 165.5 μs
- 120.5 μs
- 590.5 μs
Q60. Match List I with List II.
Choose the correct answer from the options given below:
Choose the correct answer from the options given below:
| List I | List II |
|---|---|
| A. Stack overflow | I. Software interrupt |
| B. Timer | II. Internal interrupt |
| C. Invalid opcode | III. External interrupt |
| D. Supervisor call | IV. Machine check interrupt |
- A-I, B-II, C-III, D-IV
- A-II, B-III, C-I, D-IV
- A-I, B-II, C-IV, D-III
- A-II, B-III, C-IV, D-I
Q64. A magnetic tape drive has a transport speed of 200 inches per second and a recording density of 1600 bytes per inch. The time required to write 600000 characters of data grouped into 100-character records with a blocking factor of 10 is
- 1.875 sec
- 2.6251 sec
- 2.0062 sec
- 2.6150 sec
Q100. Statement I: Consider the 20-bit 'branch' microinstruction format: F1 (3 bits) | F2 (3) | F3 (3) | CD (2) | BR (2) | AD (7), where F1, F2, F3 are micro-operation fields, CD = condition for branching, BR = branch field and AD = address field.
Statement II: An instruction in the above format can branch on 4 conditions.
Choose the most appropriate answer.
Statement II: An instruction in the above format can branch on 4 conditions.
Choose the most appropriate answer.
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct