What is the default action for the SIGSEGV signal in C?

Question

BlackTom AI · Accepted Answer

The question asks about the default action for the SIGSEGV signal in C.

Option: 'Terminate the program.'
- By default, receiving SIGSEGV (segmentation fault) causes the operating system to terminate the offending process. This is the standard behavior defined for SIGSEGV across POSIX-like systems, as it indicates an invalid memory access that the program cannot safely recover from.

Additional nuance to consider: many systems also generate a core dump as part of the default action when a segmentation fault occurs, provided the system's core-dump settings allow it. This means that, in practice, the process may be terminated and a core file may be created for debugging, which is an important detail that complements the basic statement of termination.

Rationale for not choosing any other options: since there are no alternative options listed to evaluate, this single option correctly captures the core effect of the default action for SIGSEGV, namely termination, with the possible side effect of a core dump depending on the environment. Even though core dumping is a common additional behavior, the primary default action is still the termination of the process.

In summary, the essential outcome specified here—terminating the program—is the correct core effect of the default action for SIGSEGV, acknowledging that a core dump may also occur depending on system configuration.

What is the default action for the SIGSEGV signal in C?单项选择题

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