Interview Questions

Operating System Back

What level of security does Windows NT meets?

Ans: 

C2 level security.

What are the sub-components of I/O manager in Windows NT?

Ans: 

1. Network redirector/ Server.
2. Cache manager.
3. File systems.
4. Network driver.
5. Device driver.

What is Executive in Windows NT?

Ans: 

In Windows NT, executive refers to the operating system code that runs in kernel mode.

What are the possible threads a thread can have?

Ans: 

1. Ready.
2. Standby.
3. Running.
4. Waiting.
5. Transition.
6. Terminated.

What is FtDisk?

Ans: 

It is a fault tolerance disk driver for Windows NT.

What is an idle thread?

Ans: 

The special thread a dispatcher will execute when no ready thread is found.

What is mutant?

Ans: 

In Windows NT a mutant provides kernel mode or user mode mutual exclusion with the notion of ownership.

What is process migration?

Ans: 

It is the transfer of sufficient amount of the state of process from one machine to the target machine.

What are the reasons for process suspension?

Ans: 

1. Swapping.
2. Interactive user request.
3. Timing.
4. Parent process request.

List out some reasons for process termination?

Ans: 

1. Normal completion.
2. Time limit exceeded.
3. Memory unavailable.
4. Bounds violation.
5. Protection error.
6. Arithmetic error.
7. Time overrun.
8. I/O failure.
9. Invalid instruction.
10. Privileged instruction.
11. Data misuse.
12. Operator or OS intervention.
13. Parent termination.

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