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LPIC-1 Shells, Scripting and Data Management Practice Question

Which THREE of the following are types of expansion performed by the bash shell during command parsing?

⚠ Common exam trap

Many candidates confuse alias expansion (which occurs during tokenization) with the formal expansion phases listed in the bash manual, or mistake variable assignment as an expansion type when it is actually a separate parsing step.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Parameter expansion

Parameter expansion (e.g., ${var}, $var) is a fundamental expansion step performed by the bash shell during command parsing, where variables are replaced with their values before execution. This occurs after brace expansion and tilde expansion but before word splitting and pathname expansion, as defined in the bash manual's expansion order.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
Parameter expansion
Why this is correct
e.g., ${var} expands variable value.
✓
Tilde expansion
Why this is correct
e.g., ~ expands to home directory.
✓
Brace expansion
Why this is correct
e.g., {a,b} expands to a b.
✗
Variable assignment
Why it's wrong here
Assignment is not an expansion.
✗
Alias expansion
Why it's wrong here
Aliases are replaced before parsing, not considered an expansion step.

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LPIC-1 Shells, Scripting and Data Management Practice Question

Why each option matters

Option-by-option breakdown

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