Operating System MCQs

1019 MCQs  (Page 30 of 102)

What is the host controller?
A. Controller built at the end of each disk
B. Controller at the computer end of the bus
C. All of the mentioned
D. None of the mentioned
What is the disk bandwidth?
A. The total number of bytes transferred
B. Total time between the first request for service and the completion on the last transfer
C. The total number of bytes transferred divided by the total time between the first request for service and the completion on the last transfer
D. None of the mentioned
RAID level 3 supports a lower number of I/Os per second, because _______________
A. Every disk has to participate in every i/o request
B. Only one disk participates per i/o request
C. I/o cycle consumes a lot of cpu time
D. All of the mentioned
A performance problem with _________ is the expense of computing and writing parity.
A. Non-parity based raid levels
B. Parity based raid levels
C. All raid levels
D. None of the mentioned
In RAID level 4, one block read, accesses __________
A. Only one disk
B. All disks simultaneously
C. All disks sequentially
D. None of the mentioned
A write of a block has to access ____________
A. The disk on which the block is stored
B. Parity disk
C. A parity block
D. All of the mentioned