Linux CLI - Environment and Configuration
Given the commands below, what will be the output of
echo $MY_VAR?
MY_VAR="hello" export MY_VAR MY_VAR="world"
Given the commands below, what will be the output of echo $MY_VAR?
medium📝 Command Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Trace variable assignment and export
Initially, MY_VAR is set to "hello" and exported, making it available to child processes.Step 2: Update variable value
MY_VAR is then changed to "world" in the current shell, so echo prints the latest value.Final Answer:
world -> Option AQuick Check:
Variable value updates immediately = world [OK]
Quick Trick: Last assigned value is shown by echo [OK]
Common Mistakes:
- Assuming export freezes value
- Printing variable name instead of value
- Expecting no output
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