Operating systems TRUE / FALSE questions for competitive exams
Operating Systems Quiz with Answers - 3
1.
The complexity of handling software TLB faults increases when exceptions are imprecise.
(a) TRUE (b)
FALSE
Answer:
TRUE. With imprecise exceptions, it is much harder to restart the user program
after handling the TLB fault since there is not a single instruction at which
the program can continue. [source: UCB]
2.
DMA is a mechanism for allowing an I/O device to transfer data to and from memory
without involving the CPU in the transfer.
(a) TRUE (b)
FALSE
Answer:
TRUE. Direct memory access (DMA)
is a feature of computer
systems that allows certain
hardware subsystems to access main system memory (random-access memory),
independent of the central
processing unit (CPU). [source: NYU]
3.
Memory mapped I/O determines how the pages of an I/O-bound process are mapped
to page frames.
(a)
TRUE (b) FALSE
Answer:
FALSE. [source: NYU]
4.
There is only one MBR (master boot record) on a disk drive, but there could be several
boot sectors.
(a)
TRUE (b) FALSE
Answer: FALSE.
In a single disk drive, you can have only
one boot sector [source: NYU]
5.
A context switch from one process to another can be accomplished without executing
OS code in kernel mode.
(a)
TRUE (b) FALSE
Answer:
FALSE. Context switches can occur only in kernel mode [source: NYU]
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