GATE CSE Operating Systems – Mixed Questions Practice Test | Set 1

Questions 56-60 of 200

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Question 56

NAT · Numerical Answer 1 mark

A counting semaphore S is initialized to 5. If 8 wait operations and 6 signal operations are performed on S, what is the value of S?

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Question 57

NAT · Numerical Answer 2 mark

A disk pack has 16 recording surfaces. Each surface has 512 tracks, and each track has 256 sectors. Each sector stores 512 bytes of data. What is the TOTAL storage capacity of the disk pack in Megabytes (MB)? (Set 4)

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Question 58

MSQ · Multiple Correct 2 mark

Which of the following statements about Semaphores are CORRECT?

A The wait() operation decrements the semaphore value. B The signal() operation decrements the semaphore value. C A Counting Semaphore can take any non-negative integer value. D A Binary Semaphore value is restricted to 0 and 1.

Question 59

MCQ · Single Correct 1 mark

In operating system storage architecture, what is defined as 'Bad Block'? (Set 28)

A A hardware buffer inside CPU cache B An interrupt vector allocation in Kernel RAM C A virtual memory paging table entry D A defective sector on disk managed by sector sparing or sector slipping.

Question 60

NAT · Numerical Answer 1 mark

Consider 2 processes arriving at t=0: P1 (burst 8) and P2 (burst 4). Using Preemptive SRTF scheduling, P2 arrives at $t=0$ and P1 at $t=0$. What is the waiting time (in ms) of P1?

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