1.
With
the round robin CPU scheduling in a time-shared system ________.
1 Using
very large time slice degenerates in to first come first served algorithm
2 Using
extremely small time slices improve performance
3 Using
extremely small time slices degenerate in to last in first out algorithm
4 Using
medium sized time slices leads to shortest request time first algorithm
Ans ) 1
2.
Which
of the following is a criterion to evaluate a scheduling algorithm?
1 CPU
Utilization: Keep CPU utilization as high as possible.
2
Throughput: number of processes completed per unit time.
3
Waiting Time: Amount of time spent ready to run but not running.
4 All
of the above
Ans ) 4
3.
Which
of the following is contained in Process Control Block (PCB)?
1
Process Number
2 List
of Open files
3
Memory Limits
4 All
of the Above
Ans ) 4
4.
Super
computers typically employ _______.
1 Real
time Operating system
2
Multiprocessors OS
3
desktop OS
4 None
of the above
Ans ) 2
5.
Using
Priority Scheduling algorithm, find the average waiting time for the following
set of processes given with their priorities in the order: Process : Burst Time
: Priority respectively .
P1 : 10
: 3 ,
P2 : 1
: 1 ,
P3 : 2
: 4 ,
P4 : 1
: 5 ,
P5 : 5
: 2.
1 8
milliseconds
2 8.2
milliseconds
3 7.75
milliseconds
4 3
milliseconds
Ans ) 2
6.
A
binary semaphore
1 has
the values one or zero
2 is
essential to binary computers
3 is
used only for synchronisation
4 is
used only for mutual exclusion
Ans ) 1
7.
A
process said to be in ___________ state if it was waiting for an event that
will never occur.
1 Safe
2
Unsafe
3
Starvation
4 Dead
lock
Ans ) 4
8.
the
removal of process from active contention of CPU and reintroduce them into
memory later is known as ____________.
1
Interrupt
2
Swapping
3
Signal
4
Thread
Ans ) 2
9.
The
problem of thrashing is effected scientifically by ________.
1
Program structure
2
Program size
3
Primary storage size
4 None
of the above
Ans ) 1
10.
Number
of CPU registers in a system depends on ____________.
1
Operating system
2
Computer Architecture
3
Computer Organization
4 None
of the above
Ans ) 2
11.
A
major problem with priority scheduling is _________.
1
Definite blocking
2
Starvation
3 Low
priority
4 None
of the above
Ans ) 2
12.
A ___________ contains information about the
file, including ownership, permissions, and location of the file contents.
1 File
Control Block (FCB)
2 File
3
Device drivers
4 File
system
Ans ) 1
13.
Which
directory implementation is used in most Operating System?
1
Single level directory structure
2 Two
level directory structure
3 Tree
directory structure
4
Acyclic directory structure
Ans ) 3
14.
The term " Operating System " means
________.
1 A set
of programs which controls computer working
2 The
way a computer operator works
3
Conversion of high-level language in to machine level language
4 The
way a floppy disk drive operates
Ans ) 1
15.
The
operating system of a computer serves as a software interface between the user
and the ________.
1
Hardware
2
Peripheral
3
Memory
4
Screen
Ans ) 1
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