Operating systems concept MCQ Test 9

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

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Question 1
Consider a machine in which all memory reference instructions have only one memory address, for them we need atleast ..... frame(s).
A
one
B
two
C
three
D
none of the above
Question 2
If too little space is allocated to a file,
A
the file will not work
B
there will not be any space for the data, as the FCB takes it all
C
the file cannot be extended
D
the file cannot be opened
Question 3
Memory
A
is the device where information is stored
B
is a sequence of instructions
C
is typically characterized by interactive processing and time-slicing of the CPU's time to allow quick response to each user.
D
None of the above
Question 4
Two basic types of operating systems are:
A
batch and timesharing
B
sequential and realtime
C
batch and interactive.
D
None of the above
Question 5
Contiguous allocation has two problems ......... and ......... that linked allocation solves.
  1. external fragmentation
  2. internal fragmentation
  3. size declaration
  4. memory allocation
A
I and II
B
II and III
C
II, III and IV
D
I and III
Question 6
What are characteristics of rights amplification in Hydra ?
  1. This scheme allows a procedure to be certified as trustworthy.
  2. Amplification of rights cannot be stated explicitly in declaration.
  3. It may include auxiliary rights.
  4. It includes kernel rights such as read.
A
I and II
B
II and III
C
II, III and IV
D
I and III
Question 7
Cancellation point is the point where :
A
the thread can be cancelled safely or otherwise doesnt matter
B
the thread can be cancelled safely
C
the whole process can be cancelled safely
D
none of the above
Question 8
The two kinds of semaphores are :
  1. mutex
  2. binary
  3. counting
  4. decimal
A
I and III
B
I, II and III
C
II, III and IV
D
II and III
Question 9
The term 'polling' in a computer means a process by which a computer system
A
multiplexes the inputs and updates the memory accordingly
B
decides correct alternative by analysing several ones
C
inquires to see if a terminal has any transaction to send
D
None of the above
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