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Unix Shell Script MCQs

What is the error in the following program?
1. while who | grep aa12 | wc -l
2. do
3. echo false
4. done

There is no error

Condition on line 1 is invalid

Line 3 should be echo

Line 3 should be enclosed with {}

Line 3 should be echo {false}

Answer

Correct Answer:

There is no error

Explanation:

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