If an alias ls exists, which of the following commands updates the alias to point to the command ls -l instead of the alias's current target?

Question

Options

• Aset ls='ls -l'
• Balias ls='ls -l'
• Calias --force ls='ls -l'
• Dalias --update ls ls='ls -l'
• Erealias ls='ls -l'

• A
  5% (1)
• B
  70% (14)
• C
  20% (4)
• D
  5% (1)

Explanation

Running alias ls='ls -l' simply redefines the alias - the alias built-in creates or overwrites an existing alias with the same name, so re-running it with a new target is all that's needed to update it.

Why the distractors fail:

• A - set is used to set shell options or positional parameters, not define aliases.
• C - alias has no --force flag; it overwrites silently by design, so no flag is needed.
• D - alias has no --update flag; this syntax is entirely fabricated.
• E - realias is not a real command in any standard shell.

Memory tip: Think of alias like a variable assignment - just reassign it with the same name and new value to update it, no special flags required.

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