What will be the output of the following commands?

medium📝 Command Output Q13 of 15

Linux CLI - Environment and Configuration

MYVAR="hello"
echo $MYVAR
export MYVAR
bash -c 'echo $MYVAR'

A\n\n

Bhello\n

C\nhello

Dhello\nhello

Step-by-Step Solution

Solution:

Step 1: Understand variable assignment and export
First, MYVAR is set to "hello" and printed, so first echo outputs "hello". Then MYVAR is exported.
Step 2: Child shell access
The bash -c 'echo $MYVAR' runs a new shell which inherits exported variables, so it prints "hello" again.
Final Answer:
hello hello -> Option D
Quick Check:
Exported variable visible in child shell [OK]

Quick Trick: Exported vars visible in child shells [OK]

Common Mistakes:

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