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Which of the following system call is used for duplicating file descriptor?

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Which of the following system call is used for duplicating file descriptor?

(a) dup

(b) decr

(c) exec

(d) execv

I got this question during an interview for a job.

I would like to ask this question from Process Control System Calls in division System Programming II – Process Control & Unix System Performance of Unix

1 Answer

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Best answer
Right choice is (a) dup

Best explanation: The dup system call supplicates the file descriptor fields and returns the lowest number available for allocation.

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