Libcall with Syscall

Question Text

Which of the following library calls will for sure invoke a system call?

Question Answers

• fopen()

• fwrite()

• printf()

• strcpy()

Feedback

fopen() requires opening a file and access to the operating system (for filesystem access). The others may not require a system call (strcpy()) or may use buffering to delay the invocation of a system call (fwrite(), printf()).