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Operating System
1081
Computer Science Fundamentals
998
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OS Deadlocks
For sharable resources, mutual exclusion ____________
is required
is not required
may be or may not be required
none of the mentioned
They do not require mutually exclusive access, and hence cannot be involved in a deadlock.
Author:
rikazzz
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OS I/O Systems
The __________ is used by device controllers to request service.
nonmaskable interrupt
blocked interrupt
maskable interrupt
none of the mentioned
Author:
rikazzz
Comment
OS File Systems and Their Implementation
With _______ a requested page and several subsequent pages are read and cached.
write ahead
read ahead
free-behind
add-front
Author:
rikazzz
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OS Memory Management
Every address generated by the CPU is divided into two parts. They are ____________
frame bit & page number
page number & page offset
page offset & frame bit
frame offset & page offset
Author:
rikazzz
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OS Memory Management
For every process there is a __________
page table
copy of page table
pointer to page table
all of the mentioned
Author:
rikazzz
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OS Process Synchronization
Semaphore is a/an _______ to solve the critical section problem.
hardware for a system
special program for a system
integer variable
none of the mentioned
Author:
rikazzz
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OS Process Synchronization
In the write ahead logging a _____________ is maintained.
a memory
a system
a disk
a log record
Author:
rikazzz
Comment
Computer Science Fundamentals
Which of the following is a loop statement?
IF
ELSE
WHILE
DO
WHILE is a loop statement.
Author:
rikazzz
Comment
OS Processes
What is a long-term scheduler?
It selects processes which have to be brought into the ready queue
It selects processes which have to be executed next and allocates CPU
It selects processes which heave to remove from memory by swapping
None of the mentioned
A long-term scheduler selects processes which have to be brought into the ready queue. When processes enter the system, they are put in the job queue. Long-term scheduler selects processes from the job queue and puts them in the ready queue. It is also known as Job Scheduler.
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rikazzz
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Computer Science Fundamentals
A single sequential flow of control within a program is ________
Process
Task
Thread
Structure
A thread is a sequential flow of control within a program. Single-threaded program can handle one task at any time.
Author:
rikazzz
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