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To find out how efficiently a program a used the system resources, which command is used?

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To find out how efficiently a program a used the system resources, which command is used?

(a) sys

(b) time

(c) crontab

(d) daemon

The question was asked in an international level competition.

My query is from Process Management in section The Process of Unix

1 Answer

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The correct answer is (b) time

For explanation: When there are multiple versions of a program and we want to find out how efficiently they’ve used the system resources we can use the time command. The time command accepts the entire command line to be timed as its argument. It executes the command and also displays the time usage on the terminal. For example,

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