Operational Operating System (OS) Interview Questions & Answers:

1. What are the reasons for process termination?

☛ Normal completion
☛ Time limit exceeded
☛ Memory unavailable
☛ Bounds violation
☛ Protection error
☛ Arithmetic error
☛ Time overrun
☛ I/O failure
☛ Invalid instruction
☛ Privileged instruction
☛ Data misuse
☛ Operator or OS intervention
☛ Parent termination.

2. List the sub-components of I/O manager in Windows NT?

☛ Network re-director/ Server
☛ Cache manager.
☛ File systems
☛ Network driver
☛ Device driver

3. Tell me What is executive in Windows NT?

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

4. Explain DDks?

DDks are device driver kits, which are equivalent to SDKs for writing device drivers. Windows NT includes DDks.

5. On what level of security does Windows NT meets?

C2 level security.

6. Tell me What are the rings in Windows NT?

Windows NT uses protection mechanism called rings provides by the process to implement separation between the user mode and kernel mode.

7. What is drawback of MVT?

It does not have the features like:
☛ Ability to support multiple processors
☛ Virtual storage
☛ Source level debugging

8. List the possible threads a thread can have?

☛ Ready
☛ Standby
☛ Running
☛ Waiting
☛ Transition
☛ Terminated

9. Explain FtDisk in Operating System (OS)?

It is a fault tolerance disk driver for Windows NT.

10. Explain an idle thread?

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