18 Questions
What is the main reason for a process to be moved to the 'Exit' state?
Illegal file access attempt
In the context of process termination, what does a 'Trap' refer to?
Error/exception generated within the running process
When a supervisor call is made, what does the running process typically request from the operating system?
File open operation
What occurs when a child process is terminated in a cascading manner?
All parent processes are terminated too
When does an operating system intervene in process termination?
Upon receiving an illegal file access attempt
What minimizes overhead during a Mode switch from user mode to kernel mode?
Full context switch including PC and registers
What is the function of the Kernel mode in an operating system?
Accessing restricted memory regions
How does the processor determine the mode in which it should be executing?
By reading a flag in the Program Status Word (PSW)
What triggers a change in the processor's execution mode?
Service call to the operating system
In process switching, what event can cause a process to execute beyond its time slice?
Clock interrupt
How does the operating system handle cascading process termination?
By terminating child processes first
When would an I/O interrupt typically occur during process execution?
Execution of primitive I/O instructions
Which of the following is a key advantage of a process-based operating system design?
It encourages modular design with clean interfaces between modules.
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.
In a process-based operating system, what is the purpose of system processes?
To execute OS code, such as memory allocation and process swapping.
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.
In the Unix SVR4 operating system, how does a user process enter kernel mode?
By executing a system call.
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.
Test your knowledge on operating system interrupts, traps, and I/O completion processes. Learn about how the OS handles memory faults, I/O requests, and errors within running processes.
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