Operating System(Computer Aptitude ) Questions and answers for exam Preparation

Computer Aptitude

OPERATING SYSTEM MCQs

Total Questions : 622 | Page 6 of 63 pages

Question 51. The Memory Address Register

is a hardware memory device which denotes the location of the current instruction being executed.
is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
contains the address of the memory location that is to be read from or stored into.
contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
None of the above

Discuss Question

Answer: Option C. -> contains the address of the memory location that is to be read from or stored into.

Question 52. In virtual memory systems, Dynamic address translation

is the hardware necessary to implement paging
stores pages at a specific location on disk
is useless when swapping is used
is part of the operating system paging algorithm
None of the above

Discuss Question

Answer: Option A. -> is the hardware necessary to implement paging

Question 53. Fragmentation of the file system

occurs only if the file system is used improperly
can always be prevented
can be temporarily removed by compaction
is a characteristic of all file systems
None of the above

Discuss Question

Answer: Option C. -> can be temporarily removed by compaction

Question 54. A non-relocatable program is one which

can not be made to execute in any area of storage other than the one designated for it at the time of its coding or translation.
consists of a program and relevant information for its relocation.
can itself performs the relocation of its address-sensitive portions.
all of the above
None of the above

Discuss Question

Answer: Option A. -> can not be made to execute in any area of storage other than the one designated for it at the time of its coding or translation.

Question 55. Which of the following are(is) Language Processor(s)

assembles
compilers
interpreters
All of the above
None of the above

Discuss Question

Answer: Option D. -> All of the above

Question 56. In which addressing mode the effective address of the operand is the contents of a register specified in the instruction and after accessing the operand, the contents of this register is incremented to point to the next item in the list?

index addressing
indirect addressing
auto increment
auto decrement
None of the above

Discuss Question

Answer: Option C. -> auto increment

Question 57. While working with MS-DOS, which command will you use to transfer a specific file from one disk to another?

DISKCOPY
COPY
RENAME
FORMAT
None of the above

Discuss Question

Answer: Option B. -> COPY

Question 58. The memory allocation scheme subject to "external" fragmentation is

segmentation
swapping
pure demand paging
multiple contiguous fixed partitions
None of the above

Discuss Question

Answer: Option A. -> segmentation

Question 59. What is the name of the operating system for the laptop computer called MacLite?

Windows
DOS
MS-DOS
OZ
None of the above

Discuss Question

Answer: Option D. -> OZ

Question 60. In which addressing mode the contents of a register specified in the instruction are first decremented, and then these contents are used as the effective address of the operands?