Top 550+ Solved Operating System (OS) MCQ Questions Answer
Q. The backing store is generally a
a. fast disk
b. disk large enough to accommodate copies of all memory images for all users
c. disk to provide direct access to the memory images
d. all of the mentioned
Q. The consists of all processes whose memory images are in the backing store or in memory and are ready to run.
a. wait queue
b. ready queue
c. cpu
d. secondary storage
Q. The time in a swap out of a running process and swap in of a new process into the memory is very high.
a. context – switch
b. waiting
c. execution
d. all of the mentioned
Q. Swapping be done when a process has pending I/O, or has to execute I/O operations only into operating system buffers.
a. must
b. can
c. must never
d. maybe
Q. Swap space is allocated
a. as a chunk of disk
b. separate from a file system
c. into a file system
d. all of the mentioned
Q. CPU fetches the instruction from memory according to the value of
a. program counter
b. status register
c. instruction register
d. program status word
Q. A memory buffer used to accommodate a speed differential is called
a. stack pointer
b. cache
c. accumulator
d. disk buffer
Q. Which one of the following is the address generated by CPU?
a. physical address
b. absolute address
c. logical address
d. none of the mentioned
Q. Run time mapping from virtual to physical address is done by
a. memory management unit
b. cpu
c. pci
d. none of the mentioned
Q. Memory management technique in which system stores and retrieves data from secondary storage for use in main memory is called?
a. fragmentation
b. paging
c. mapping
d. none of the mentioned
Q. The address of a page table in memory is pointed by
a. stack pointer
b. page table base register
c. page register
d. program counter
Q. Program always deals with
a. logical address
b. absolute address
c. physical address
d. relative address
Q. The page table contains
a. base address of each page in physical memory
b. page offset
c. page size
d. none of the mentioned
Q. What is compaction?
a. a technique for overcoming internal fragmentation
b. a paging technique
c. a technique for overcoming external fragmentation
d. a technique for overcoming fatal error
Q. Operating System maintains the page table for
a. each process
b. each thread
c. each instruction
d. each address