UGC-NET/GATE Multiple Choice Questions for Operating System.
is a natural consequences of virtual memory system
can always be avoided by swapping
always occurs on large computers
can be caused by poor paging algorithms
For I/O bound jobs, in a uniprogramming process CPU can be in idle state for
10-20% of time
30-40% of time
60-70% of time
80-90% of time
A scheduling algorithm assigns priority proportional to the waiting time of a process. Every process starts with priority zero (the lowest priority). The scheduler re-evaluates the process priorities every T time units and decides the next process to schedule. Which one of the following is TRUE if the processes have no I/O operations and all arrive at time zero?
This algorithm is equivalent to the first-come-first-serve algorithm
This algorithm is equivalent to the round-robin algorithm
This algorithm is equivalent to the shortest-job-first algorithm
This algorithm is equivalent to the shortest-remaining-time-first algorithm
Process in which a program is written to respond to the button clicks, menu selections, and other actions of user in whatever order is termed as
The kernel of the operating system remains in the primary memory because.....
It is mostly called (used)
It manages all interrupt calls
It controls all operations in process
It is low level
In distributed file system, file name does not reveal the file's
physical storage location
both local name and physical storage location
none of the mentioned
Which one of the following is not a valid state of a thread?
Segment pointers divided memory into
The address loaded into the memory address register of the memory is referred to as:
Neither physical nor logical
None of the mentioned
Beowulf clusters of the computer system uses
close source softwares
open source softwares
both A and B
Which class network is used for a collection of a small number of networks with a large number of nodes?
All of the above
In the non blocking send:
the sending process keeps sending until the message is received
the sending process sends the message and resumes operation
the sending process keeps sending until it receives a message
None of these
What are the different ways file accesses take place?
indexed sequential access
all of the mentioned
Entering point of the windows is
log in screen
In a real time system the computer results:
must be produced withing a specific deadline period
may be produced at any time
may be correct
all of the mentioned
The.......... policy segments the disks request queue into sub queues of the length N.
There are 16 questions to complete.