Multiple choice technology programming languages

What is the difference between at & cron?

  1. Both are Unix scheduling utilities

  2. at is restricted one and crontab is not restricted

  3. No difference

  4. at takes input from user while cron takes from a confiuration file
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D Correct answer
Explanation

The at utility is designed to execute a job once at a specified time, taking input from the user/stdin, whereas cron is used for recurring scheduled tasks defined in configuration files (crontabs).

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