Computer Science Quiz

RAID level works worst with operating systems that habitually ask for data one sector at a time

• 0

• 1

• 2

• 3

What is the output of the following command: echo $((5/2* 2)) ?

• 1

• 5

• 4

• 2

A system uses 3 page frames for storing process pages in main memory. It uses the Least Recently Used(LRU) page replacement policy. Assume that all the page frames are initially empty. What is the total number of page faults that will occur while processing the page reference string given below 4, 7, 6, 1, 7, 6, 1, 2, 7, 2

• 2

• 4

• 6

• 7

How many layers are there in the I/O software system?

• 3

• 4

• 6

• 5

If FIFO page replacement is used with three page frames, how many page faults will occur with the reference string 1, 3, 0, 3, 5, 6, (if the three frames are initially empty)?

• 6

• 4

• 7

• 3

If FIFO page replacement is used with three page frames, how many page faults will occur with the reference string 1, 2, 3, 4, 1, 2 (if the three frames are initially empty)?

• 6

• 4

• 5

• 3

If LRU page replacement is used with three page frames, how many page faults will occur with the reference string 7, 0, 1, 2, 0, 3 (if the three frames are initially empty)?

• 5

• 4

• 6

• 3

If optimal page replacement is used with four page frames, how many page faults will occur with the reference string 7, 0, 1, 2, 0, 3, 0 if the four frames are initially empty?

• 5

• 6

• 4

• 7

Assume we have a 16-bit virtual address and a 4-KB page size. How many indexes are in a one-level page table?

• 16

• 4

• 8

• 64

While the search for cylinder 11 is in progress, new requests appear for cylinders 1, 36, 16, 34, 9, and 12. Considering SSF (Shortest Seek First) scheduling, what is the total number of head movements?

• 61

• 111

• 60

• 108