Which of the following commands would return process_id of sleep command? (A) Sleep 1 and echo $? (B) Sleep 1 and echo $# (C) Sleep 1 and echo $x (D) Sleep 1 and echo $!

Which of the following commands would return process_id of sleep command? (A) Sleep 1 and echo $? (B) Sleep 1 and echo $# (C) Sleep 1 and echo $x (D) Sleep 1 and echo $!
by

1 Answer

Answer :

(D) Sleep 1 and echo $!
by

Related questions

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Description : Which of the following statement is not correct with reference to cron daemon in UNIX O.S? (A) The cron daemon is the standard tool for running commands on a predetermined schedule. (B) It starts ... command lines and the times at which they invoked. (D) Crontab for individual users are not stored.

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Last Answer : b) len(d)

Suppose d = {“john”:40, “peter”:45}, to delete the entry for “john” what command do we use a) d.delete(“john”:40) b) d.delete(“john”) c) del d[“john”]. d) del d(“john”:40)

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Last Answer : c) del d[“john”].

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Last Answer : d) list1.removeOne(“hello”)

To insert 5 to the third position in list1, we use which command ? a) list1.insert(3, 5) b) list1.insert(2, 5) c) list1.add(3, 5) d) list1.append(3, 5)

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Last Answer : a) list1.insert(3, 5)

To add a new element to a list we use which command ? a) list1.add(5) b) list1.append(5) c) list1.addLast(5) d) list1.addEnd(5)

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Last Answer : a) list1.add(5)

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