PGT Computer Science (Level-3), (HTET Practice MCQs) (Part-IV)

Total Questions: 100

1. The channel capacity of a band-limited Gaussian channel is given by:

Correct Answer: B.

2. The graph K₃,₄ has:

Correct Answer: D. 12 edges

3. The total number of spanning trees that can be drawn using five labelled vertices is:

Correct Answer: A. 125

4. Extremely low power dissipation and low cost per gate can be achieved in:

Correct Answer: В. С МOS ICs

5. An example of a universal building block is:

Correct Answer: D. NOR gate

6. An example of a layer that is absent in broadcast networks is:

Correct Answer: C. network layer

7. The ATM cell is:

Correct Answer: B. 53 bytes long

8. Four jobs J₁, J₂, J₃ and J₄ are waiting to be run. Their expected run times are 9, 6, 3 and 5 respectively. In order to minimise average response time, the jobs should be run in the order:

Correct Answer: D. J₃ J₄ J₂ J₁

9. Suppose it takes 100 ns to access page table and 20 ns to access associative memory. If the average access time is 28 ns, the corresponding hit rate is:

Correct Answer: B. 90 per cent

10. Transmission of N signals, each band limited to fₘ Hz by TDM, requires a minimum bandwidth of:

Correct Answer: C. N fₘ