Which of the following statements about wait(2) and waitpid(2) are true? The waitpid(2) function can block the caller until a child process terminates, whereas wait(2) has an option that prevents it from blocking. The wait(2) function doesn't wait for the child that terminates first; it has a number of options that control which process it waits for. If a child has already terminated and is a zombie, wait(2) returns immediately with that child's status. Otherwise, it blocks the caller until a child terminates. O All of the above. None of the above.
Which of the following statements about wait(2) and waitpid(2) are true? The waitpid(2) function can block the caller until a child process terminates, whereas wait(2) has an option that prevents it from blocking. The wait(2) function doesn't wait for the child that terminates first; it has a number of options that control which process it waits for. If a child has already terminated and is a zombie, wait(2) returns immediately with that child's status. Otherwise, it blocks the caller until a child terminates. O All of the above. None of the above.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:Which of the following statements about wait(2) and waitpid(2) are true?
The waitpid(2) function can block the caller until a child process terminates,
whereas wait(2) has an option that prevents it from blocking.
The wait(2) function doesn't wait for the child that terminates first; it has a
number of options that control which process it waits for.
If a child has already terminated and is a zombie, wait(2) returns immediately
with that child's status. Otherwise, it blocks the caller until a child terminates.
O All of the above.
None of the above.
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