Applying locale precedence | LinuC Level 1 102 Exam original practice question

1.08.3Basic

Determine the effective date/time locale from the provided environment values.

LANG=en_US.UTF-8
LC_TIME=ja_JP.UTF-8
LC_ALL=C

Which value becomes effective?

Hint 1: Focus on locale scope

Identify which locale category controls the displayed language, numeric format, or date and time format.

Hint 2: Key terms

Review the short definitions of locale categories, character encoding, and timezone settings involved.

LANG: The default locale value used when a more specific category is not set.
LC_TIME: The locale category for date and time formatting.
LC_ALL: A high-precedence setting that overrides LANG and individual LC_* categories.
Locale precedence: The order used to resolve LC_ALL, a specific LC_* value, and LANG.

Detailed explanation

Incorrecten_US.UTF-8

Incorrect. LANG is the lowest-priority fallback.

Incorrectja_JP.UTF-8

Incorrect. LC_TIME is overridden by LC_ALL.

CorrectC

Correct. LC_ALL=C has the highest priority.

Incorrect未定義になる

Incorrect. The precedence resolves the value to C.

An example you can run in a temporary verification environment.

LANG=en_US.UTF-8 LC_TIME=ja_JP.UTF-8 LC_ALL=C locale LC_TIME

Foundation review

A setting that controls language, numeric formatting, collation, or date display.

A mapping between characters and the bytes used to represent them.

A rule set that converts timestamps for a region or display context.

Question IDKL-102-1061

EnvironmentPOSIX locale / 子プロセス環境だけ変更

Last technical review2026-08-13

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