Software interrupts run in kernel mode .a. System calls arguments can be both checked in user and kernel mode. b. System call errors can be reported using variable ""errno"" and function ""perror"" c. System calls are defined in the file /usr/include/sys/syscall. h d. System calls utilize Software Interrupts

The correct answer is B)

System call errors can be reported using variable ""errno"" and function ""perror""

Explanation:

The perror() function creates a message on standard error describing the last error encountered during a call to a system or library function

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The <errno.h> header file defines symbolic names for each of the possible error numbers that may appear in errno.

In the standard library of the C programming language, errno.h is normally stored as a header file.  It defines macros for reporting and retrieving error conditions using the symbol errno. errno acts like an integer variable. A value is stored in errno by certain library functions when they detect errors.

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