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Download in pdf on Operating System multiple choice questions(MCQs) and answers. These quiz objective questions are important for graduate, under-graduate & competitive examinations NIELIT, BCA, B.Sc. MCA, M.Sc(IT), BE, B.Tech, CCNA, MCSE etc.
(21)
In a multiprogramming environment
[A]
more than one process resides in the memory
[B]
the programs are developed by more than one person
[C]
the processor executes more than one process at a time
[D]
a single user can execute many programs at the same time
Comment
(22)
In which of the following directory systems, is it possible to have multiple complete paths for a file starting from the root directory?
[A]
Single level directory
[B]
Two level directory
[C]
Tree structured directory
[D]
Acyclic graph directory
Comment
(23)
Which of the following is true?
[A]
The linkage editor links object modules during compiling or assembling.
[B]
The linkage editor links object modules and resolves external references between them before loading.
[C]
The linkage editor resolves external references between the object modules during execution time.
[D]
The linkage editor is used to edit programs which have to be later linked together.
Comment
(24)
Fence register is used for
[A]
file protection
[B]
CPU protection
[C]
memory protection
[D]
all of the above
Comment
(25)
If the property of locality of reference is well pronounced in a program
[A]
the number of page faults will be more
[B]
the number of page faults will be less
[C]
execution will be faster
[D]
Both (B) and (C)
Comment
(26)
With a single resource, deadlock occurs
[A]
if there are only two processes competing for that resource
[B]
if there is a single process competing for that resource
[C]
if there are more than two processes competing for that resource
[D]
none of the above
Comment
(27)
Supervisor call
[A]
is a call with control functions
[B]
is a call made by the supervisor of the system
[C]
are privileged calls that are used to perform resource management functions, which are controlled by the operating system.
[D]
is a call made by someone working in root directory
Comment
(28)
Working set (t, k) at an instant of time, t, is the set of
[A]
k references with high frequency
[B]
pages that have been referenced in the last k time units
[C]
k future references that the operating system will make
[D]
future references that the operating system will make in the next 'k' time units
Comment
(29)
Concurrent processes are processes that
[A]
overlap in time
[B]
do not overlap in time
[C]
are executed by a processor at the same time
[D]
none of the above
Comment
(30)
In paged memory systems, if the page size is increased, then the internal fragmentation generally
[A]
becomes more
[B]
becomes less
[C]
remains constant
[D]
none of the above
Comment
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