Wednesday, March 25, 2020

Operating systems questions set 3

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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