Which of the following is a valid use of the 'declare' command when locating PATH?

• A. declare | grep PATH
• B. declare -x PATH
• C. declare PATH=VALUE
• D. declare | show PATH

Answer: (A)

Locating PATH can be done by listing shell variables and then filtering for the one you want. The declare builtin, when used with no arguments, prints all declared variables along with their attributes. Piping that output to grep for PATH searches through that list and returns the entry for the PATH variable, including its current value. This makes it a direct and effective way to find PATH in your session.

The other constructions aren’t suitable for this purpose. Using a form that exports PATH doesn’t show its value, assigning PATH=VALUE would modify it, not locate it, and a pipe to a non-existent command isn’t valid in Bash.