89. Thrashing
is a natural consequence of virtual memory systems
can always be avoided by swapping
always occurs on large computers
can be caused by poor paging algorithms
✅ The correct answer is D.
91. A public key encryption system
allows anyone to decode the transmission
allows only the correct sender to decode the data
allows only the correct receiver to decode the data
does not encode the data before transmitting it
✅ The correct answer is C.
93. In which type of the following OS, the response time is very crucial.
Network Operating System
Real Time Operating System
Batch Operating System
Unix Operating System
✅ The correct answer is B.
95. Block or buffer caches are used
to improve disk performance
to handle interrupts
to increase the capacity of main memory
to speed up main memory read operation
✅ The correct answer is A.
97. The Memory Buffer Register (MBR)
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”.
✅ The correct answer is D.
99. Seeks analysis
is used for analyzing paging problems
is used for analyzing device busy problems
is used for analyzing control-unit busy problems
is only shown on real-time displays
✅ The correct answer is B.
102. Which is not the function of the operating system?
Memory management
Disk management
Application management
Virus protection
✅ The correct answer is D.
65. With MS-DOS which command will divide the surface of the blank floppy disk into sectors and assign a unique address to each one?
FORMAT command
FAT command
VER command
CHKDSK command
✅ The correct answer is A.
67. The principle of locality of reference justifies the use of
reenterable
non reusable
virtual memory
cache memory
✅ The correct answer is D.
70. Which of the following, is necessary to work on a computer
Compiler
Operating system
Assembly
Interpreter of the above
✅ The correct answer is B.