NVIDIA Interview Question for Software Engineer / Developers






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synchronous: SIGFPE, SIGSEV
asynchronous: SIGINT

- Anonymous December 11, 2009 | Flag Reply
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in UNIX
all signals are asynchronous

- Anonymous December 25, 2009 | Flag
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The occurrence of a signal may be synchronous or asynchronous to the process or thread, depending on the source of the signal and the underlying reason or cause. Synchronous signals occur as a direct result of the executing instruction stream, where an unrecoverable error (such as an illegal instruction or illegal address reference) requires an immediate termination of the process. Such signals are directed to the thread which caused the error with its execution stream. As an error of this type causes a trap into a kernel trap handler, synchronous signals are sometimes referred to as traps.

Asynchronous signals are external to (and in some cases, unrelated to) the current execution context. One obvious example would be the sending of a signal to a process from another process or thread via a kill(2), _lwp_kill(2) or sigsend(2) system call, or a thr_kill(3T), pthread_kill(3T) or sigqueue(3R) library invocation. Asynchronous signals are also aptly referred to as interrupts.

- Reema July 25, 2014 | Flag Reply


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