What is the effect of executing the following system call on the file "test.txt"?
open("test.txt", O_TRUNC)

The file is truncated to the nearest block size before returning.

The file is created before returning.

The file is opened.

If test.txt exists, the file is truncated to 0 bytes before returning.

Answer:

If test.txt exists, the file is truncated to 0 bytes before returning.

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What is the effect of executing the following system call on the file "test.txt"?open("test.txt", O_TRUNC)