Operating Systems Lab #06: Inter Process Communication
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Questions and Answers

What is Inter-process communication (IPC) in operating systems?

IPC is a mechanism that allows multiple processes to communicate and share resources with each other.

When is shared memory used in IPC?

Shared memory is used when two or more processes need to share a large amount of data.

What is the purpose of using Semaphores and Mutexes in IPC?

Semaphores and mutexes prevent race conditions when multiple processes access shared resources simultaneously.

How are pipes and FIFOs different from shared memory in IPC?

<p>Pipes and FIFOs are used to communicate related processes with a common ancestry, while shared memory is used for sharing a large amount of data among processes.</p> Signup and view all the answers

What is the role of signals in IPC?

<p>Signals are used to notify processes of events or errors.</p> Signup and view all the answers

What are the three standard file descriptors expected by Linux processes when they start?

<ol> <li>standard input (0), 2. standard output (1), 3. standard error (2)</li> </ol> Signup and view all the answers

What does the read() system call in Linux do?

<p>read() attempts to read up to count bytes of data from the file associated with the file descriptor fd and places them into the buffer starting at buf.</p> Signup and view all the answers

What does the write() system call in Linux do?

<p>write() writes up to count bytes from the buffer pointed to by buf to the file referred to by the file descriptor fd.</p> Signup and view all the answers

What does it mean if a read call returns 0?

<p>If a read call returns 0, it means it had nothing to read; it reached the end of the file.</p> Signup and view all the answers

What does it mean if a write call returns -1?

<p>If a write call returns -1, it means there has been an error in the write call.</p> Signup and view all the answers

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