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Which command is used to display all the running and active real-time processes?

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Which command is used to display all the running and active real-time processes?

(a) tp

(b) top

(c) vmstat

(d) lsof

I have been asked this question in an interview for internship.

This key question is from Performance Components and Tools in section System Programming II – Process Control & Unix System Performance of Unix

1 Answer

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Best answer
Right choice is (b) top

Easy explanation: top command is system monitoring program which is used to display all the running and active real-time process. It displays CPU usage, memory usage, swap memory, cache size, buffer size, process PID and much more.

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