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Online Tests
PPSC Computer Science Chapter 19 Operating System Online Test MCQs With Answers
Question # 1
Which command is used to copy files.
Choose an answer
cp
copy
mv
move
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Question # 2
Which process is known for initializing a microcomputer with its OS.
Choose an answer
Cold booting
Boot recording
Booting
Warm booting
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Question # 3
Which is not a valid file type in LINUX.
Choose an answer
Socket
FIFO
Soft link
Inode
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Question # 4
Solaris is product of.
Choose an answer
IBP
IBM
Microsoft
Sun microsystmes
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Question # 5
Fragmentation of a file system.
Choose an answer
Occurs only is file is not used properly
Can always the prevented
Happens in all file systems.
Can be removed by conmpaction
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Question # 6
Multiprogramming system
Choose an answer
Are easier to develop than signal programming system.
Execute each job faster
Execute more jobs in the same time
Are used only on large main frame computers.
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Question # 7
Four necessary conditions for dead lock are none pre emption circular wait and
Choose an answer
Mutual exclusion
Race condition
Buffer overflow
None of above
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Question # 8
Reference bit is used for
Choose an answer
Implementing LRU page replacement algorithm
Implementing NRU algorithm
To check the page table entry in the cache memory
None of above
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Question # 9
Which operating system reacts in the acutal time.
Choose an answer
Batch system
Quick response system
Real time system
Time sharing system
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Question # 10
Which one is true.
Choose an answer
The linkage editor is used to edit program which have to later link together.
The linkage editor links object module during compling
The linkage editor links objects modules and resolves external reference between them before loading.
None of above
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Question # 11
Which type of software can be used to merge data of two files in one files.
Choose an answer
System software
Networking software
Documenting software
utility software
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Question # 12
How applications communicates with kernel.
Choose an answer
Not disclosed by linux team
SSL
System calls
Shell
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Question # 13
if the CPU scheduling policy is FCFS then what would be average waiting time.
Choose an answer
10 ms
10.8 ms
12 ms
12.8 ms
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Question # 14
The part of machine level instruction which tells the central processor what has to be done is.
Choose an answer
Operation code
Address
Locator
Flip flop
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Question # 15
In real time OS, which is most suitable scheduling scheme.
Choose an answer
Round robin
FCFS
Pre-emptive scheduling
Random scheduling
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Question # 16
Distributed system should.
Choose an answer
High security
Have better resource sharing
Better system utilization
Low system overhead
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Question # 17
Which among the following is used to write small program to control Linux Functionalities.
Choose an answer
Shell commands
Shell script
C
Java
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Question # 18
By which of following the problem of thrashing is significantly affected.
Choose an answer
Program size
Program structure
Primary storage
Secondary strorage
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Question # 19
What the name given to the values that are automatically provided by software to reduce keystrokes and improve a computer users productivity.
Choose an answer
Defined values
Fixed values
Default values
None of the above
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Question # 20
Dijkstra's algorithm deals with
Choose an answer
Mutual exclusion
Dead lock avoidance
Dead lock recovery
Real time processing
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Question # 21
Spooling most beneficial where
Choose an answer
Jobs are I/O bound
Jobs are CPU bound
Jobs are evenly divided as I/O bound are CPU bond
All of above
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