Operating System Interrupts and Traps Quiz

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What is the main reason for a process to be moved to the 'Exit' state?

Memory fault in virtual memory

Illegal file access attempt (correct)

I/O completion

Supervisor call

In the context of process termination, what does a 'Trap' refer to?

OS issue with I/O request

Error/exception generated within the running process (correct)

Switch to OS routine due to supervisor call

Memory fault in virtual memory

When a supervisor call is made, what does the running process typically request from the operating system?

File open operation (correct)

Memory fault resolution

PCB update

I/O completion

What occurs when a child process is terminated in a cascading manner?

All parent processes are terminated too Signup and view all the answers

When does an operating system intervene in process termination?

Upon receiving an illegal file access attempt Signup and view all the answers

What minimizes overhead during a Mode switch from user mode to kernel mode?

Full context switch including PC and registers Signup and view all the answers

What is the function of the Kernel mode in an operating system?

Accessing restricted memory regions Signup and view all the answers

How does the processor determine the mode in which it should be executing?

By reading a flag in the Program Status Word (PSW) Signup and view all the answers

What triggers a change in the processor's execution mode?

Service call to the operating system Signup and view all the answers

In process switching, what event can cause a process to execute beyond its time slice?

Clock interrupt Signup and view all the answers

How does the operating system handle cascading process termination?

By terminating child processes first Signup and view all the answers

When would an I/O interrupt typically occur during process execution?

Execution of primitive I/O instructions Signup and view all the answers

Which of the following is a key advantage of a process-based operating system design?

It encourages modular design with clean interfaces between modules. Signup and view all the answers

In the Unix SVR4 (System V Release 4) operating system, which of the following statements is true?

Most of the OS executes within the environment of a user process. Signup and view all the answers

In a process-based operating system, what is the purpose of system processes?

To execute OS code, such as memory allocation and process swapping. Signup and view all the answers

What is the advantage of implementing non-critical OS functions as separate processes in a process-based operating system?

It improves performance in a multiprocessor or multicomputer environment. Signup and view all the answers

In the Unix SVR4 operating system, how does a user process enter kernel mode?

By executing a system call. Signup and view all the answers

What is the key advantage of having a user program interrupted to employ an OS routine and then resumed, without incurring the penalty of two process switches?

It improves overall system performance. Signup and view all the answers