[Solved] You have a script that sets multiple variables:var1="one" var2="two" var3="three"You want to unset only variables that start with var and end with... Which command correctly unsets these variables? | Bash Scripting

Bash Scripting - Variables

You have a script that sets multiple variables:

var1="one"
var2="two"
var3="three"

You want to unset only variables that start with var and end with an odd number (1 or 3). Which command correctly unsets these variables?

Aunset var1 var2 var3

Bunset var2 var3

Cunset var1 var3

Dunset var2

Step-by-Step Solution

Solution:

Step 1: Identify variables starting with 'var' and ending with odd numbers
Variables are var1, var2, var3. var1 ends with 1 (odd), var3 ends with 3 (odd), var2 ends with 2 (even).
Step 2: Select variables to unset
Only var1 and var3 match the pattern, so the command should unset these two.
Final Answer:
unset var1 var3 -> Option C
Quick Check:
Unset only odd-ending vars = A [OK]

Quick Trick: Unset only variables matching pattern explicitly [OK]

Common Mistakes:

MISTAKES

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