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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()).