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Operating systems are the heart of computer systems, which manage hardware and software resources while providing essential services for computer programs. Whether you are a student, IT professional, or preparing for technical interviews, mastering operating systems plays vital role in your success.
We have covered of wide range of operating system topics, including process management, memory management, file systems, and more. Check these operating system question and answers to deepen your understanding, sharpen your skills, and ace your exams or interviews.
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Q 61.
How to solve starvation problem ?
Ans.
By using Multi-level feedback queue
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Q 62.
What is starvation in Operating system ?
Ans.
It occurs when a high priority process keep executing and low priority processes get blocked for indefinite time.
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Q 63.
In scheduling algorithms, how to calculate Turn around time ?
Ans.
Completion time - Arrival time
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Q 64.
What is Arrival time ?
Ans.
The time at which process enter in the ready queue or state.
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Q 65.
What is completion time ?
Ans.
Point of time at which the process complete its execution.
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Q 66.
What is burst time ?
Ans.
It is time duration required by a process to get execute on CPU
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Q 67.
Round robin scheduling is preemptive or non-preemptive ?
Ans.
Preemptive
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Q 68.
In threads content switching is faster or slower ?
Ans.
Faster
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Q 69.
All system calls are executed in which mode ?
Ans.
Kernal mode
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Q 70.
What is user mode in operating system ?
Ans.
When we use application on PC they are all in user mode.
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Q 71.
Fork() process control system call is used for ?
Ans.
To create a new child process
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Q 72.
What are file related system calls ?
Ans.
open(), read() and write()
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Q 73.
get Pid system calls used for ?
Ans.
Get Pid of process
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Q 74.
chmod ugu + rw 'note' command can be represented in octal notation as ?
Ans.
chmod 666 note
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Q 75.
Which command is used to assign only read permission to all categories of file 'note' ?
Ans.
chmod ugo = r note
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Q 76.
New state process is remain in which memory ?
Ans.
Secondary memory
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Q 77.
When any process is intrupted by I/O request then it will move Running state to ?
Ans.
Ready state
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Q 78.
What is process states cycle ?
Ans.
New -> Ready -> Running -> Terminated
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Q 79.
Which operating system is based on CPU time constraint and no more time delay allowed ?
Ans.
Real time operating system
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Q 80.
In which operating system CPU will never remain Idle ?
Ans.
Multitasking Operating Sytem
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Q 81.
Multi-programmed operating system is premptive or non-premptive ?
Ans.
Non-premptive
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Q 82.
What is Batch operating system ?
Ans.
This is non-premptive based operating system, in which CPU can do one job at one time.
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Q 83.
Semaphores are mostly used to implement ?
Ans.
IPC mechanisms
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Q 84.
What are two basic types of operating systems ?
Ans.
Batch and interactive
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