Operating systems concept MCQ Test 45

UGC-NET/GATE Multiple Choice Questions for Operating System.

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Question 1
Which of the following filename extension suggests that the file is a backup copy of another file?
A
COM
B
BAS
C
BAK
D
None of the above
Question 2
A program is generally composed of several different localities, which ..... overlap.
A
may
B
must
C
do not
D
must not
Question 3
With round robin scheduling algorithm in a time shared system,
A
using very large time slices converts it into First come First served scheduling algorithm
B
using very small time slices converts it into First come First served scheduling algorithm
C
using extremely small time slices increases performance
D
using very small time slices converts it into Shortest Job First algorithm
Question 4
Transient operating system code is code that :
A
is not easily accessible
B
comes and goes as needed
C
stays in the memory always
D
never enters the memory space
Question 5
Which of following is not a stream cipher?
A
two fish
B
RC5
C
RC4
D
TBONE
Question 6
...... is a unique tag, usually a number, identifies the file within the file system.
A
File identifier
B
File name
C
File type
D
none of the above
Question 7
In UNI,X exactly which operations can be executed by group members and other users is definable by :
A
the group s head
B
the file s owner
C
the file s permissions
D
all of the above
Question 8
Protection against computer viruses is
A
preventation
B
practice of safe computing
C
purchasing unopened software from vendors
D
avoiding free or pirated copies from public sources
Question 9
The three general methods for delivering content from a server to a client across a network are :
  1. unicasting
  2. duplex-casting
  3. broadcasting
  4. multicasting
c, d
A
I and III
B
II and III
C
II, III and IV
D
I,III and IV
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