Interview Question Software Engineer / Developers




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1
of 1 vote

there is a context switch associated with a system call

- Anonymous on January 03, 2010 | Flag Reply
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0
of 0 vote

This is not related to C++ or any language.
Libraries are utility functions - written once and used by many applications.
System calls are calls into operating system to perform functions that only an OS can do.
Certain library functions, like printf(), end up calling a system functions to send the buffer to the output device.

- Anonymous on January 03, 2010 | Flag Reply
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0
of 0 vote

I think what he was looking for is that system calls send a request to the kernel and takes you to the kernel mode. But library calls do not take control to the kernel execute in user mode itself.

- malaysanghi on August 11, 2013 | Flag Reply


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