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We can schedule a job to run at a specified time of day using _______ command.

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We can schedule a job to run at a specified time of day using _______ command.

(a) batch

(b) at

(c) cron

(d) jobs

The question was asked in an interview for internship.

My question is from Process Management topic in portion The Process of Unix

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Best answer
Right option is (b) at

Easiest explanation: UNIX provides sophisticated facilities to schedule a job to run at a specified time of day using at command. at command takes as its arguments the time the job is to be executed and displays the > prompt. The input then has to be supplied from standard input. For example,

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