Run a follow-up only after success | LinuC Level 1 102 Exam original practice question

1.06.1Basic

Run reload_service only when check_config exits successfully.

Which form is appropriate?

Hint 1: Focus on shell scope

Separate login and non-login shells, interactive behavior, current-shell changes, and command expansion before comparing the choices.

Hint 2: Key terms

Review the short definitions of the shell files, process boundaries, and expansion rules involved.

Exit status: A numeric result used by the shell to evaluate command success or failure.
&&: An operator that runs the right side only when the left side returns zero.
||: An operator that runs the right side only when the left side returns nonzero.
;: A command separator that does not use the previous result as a condition.
Short-circuit evaluation: Skipping a later command when an earlier condition already determines the result.

Detailed explanation

Correctcheck_config && reload_service

Correct. The right side runs only when check_config succeeds.

Incorrectcheck_config || reload_service

Incorrect. || runs the right side after failure.

Incorrectcheck_config ; reload_service

Incorrect. ; runs the right side regardless of status.

Incorrectcheck_config | reload_service

Incorrect. | creates a pipeline, not a success condition.

An example you can run in a temporary verification environment.

sh -c 'true && echo ran; false && echo skipped; :'

ranだけを表示

Foundation review

A later command is skipped when an earlier condition already determines the result.

An operator that runs the right side only when the left side returns zero.

The numeric command result used by the shell to evaluate success or failure.

Question IDKL-102-903

EnvironmentPOSIX sh / 状態変更なし

Last technical review2026-08-13

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