Which of the following commands lists all defines variables and functions within Bash?

Question

Options

• Aenv
• Bexport
• Cenv -a
• Dset
• Eecho $ENV

• A
  4% (1)
• B
  11% (3)
• C
  7% (2)
• D
  74% (20)
• E
  4% (1)

Explanation

set (D) lists all shell variables, environment variables, and functions defined in the current Bash session - making it the most comprehensive command for inspecting the shell's full state.

Why the distractors are wrong:

• A. env - shows only exported environment variables, not shell-local variables or functions.
• B. export - with no arguments, lists only exported variables (similar to env), not functions or unexported locals.
• C. env -a - not a standard flag; -a is not widely supported and even where it exists, env still only covers environment variables.
• E. echo $ENV - prints the path to a startup file (if set), not a list of variables or functions.

Memory tip: Think of set as "see everything" - it's the broadest of the bunch. If you need just exported variables, use env or export; if you need everything (locals + globals + functions), use set.

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