Questions realted Operating System faces in interview of 2021:

What is Kernal? (V. Imp)
What is a process in OS and What are the different states of a process?
What is a Scheduling Algorithm? Name different types of scheduling algorithms.
What do you mean by FCFS Algorithm and best advantages of it?
What is virtual memory?
What is thread in OS?
What is Cache ? (Use a Example)
What is the difference between paging and segmentation?
What is thrashing in OS?

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