Process Scheduling

Question

Which one is not a valid reason for process termination ?

1) Time limit exceeded

2) memory unavailable

3) Parent termination

4) Child termination

Explain with giving an example of each

Answer 1

Ans: 4) Child Termination

A process can terminate in one of the following basic ways:

• by exiting (i.e., the process terminates itself)
• by being signalled
• by having no running threads (i.e., the thread count goes to 0 )

In some operating systems, if a parent process dies, then all of its child processes die too.

When a process terminates—no matter why—all of its resources are cleaned up:

• Any remaining threads are terminated.
• All file descriptors are closed.
• All channels and side-channel connections are destroyed.
• All memory mappings for the process are unmapped. This includes code, data, heap, hardware mappings, and shared memory.

Answer 2

child termination.

Answer 3

1.a time limit can be set if we want to terminate a process automatically after some time.

2.a memory unavailable will also lead to process termination.

3.parent termination may lead to cascading termination in some operating systems.

4.child termination will not lead to process termination (the parent).and will continue to execute.[correct answer]

https://en.m.wikipedia.org/wiki/Process_management_(computing)#Process_termination