Overriding every locale category | LinuC Level 1 102 Exam original practice question

1.08.3Basic

LANG and LC_TIME are set to Japanese UTF-8.

Temporarily override every locale category to C.

Which setting is appropriate?

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_CTYPE: The locale category for character classification and handling.
LC_ALL: A high-precedence setting that overrides LANG and individual LC_* categories.

Detailed explanation

IncorrectLANG=C

Incorrect. LANG is overridden by an existing LC_TIME and by LC_ALL.

IncorrectLC_TIME=C

Incorrect. This changes only the time category.

IncorrectLC_CTYPE=C

Incorrect. This changes only character classification.

CorrectLC_ALL=C

Correct. LC_ALL=C overrides all categories.

An example you can run in a temporary verification environment.

LANG=ja_JP.UTF-8 LC_TIME=ja_JP.UTF-8 LC_ALL=C locale | sed -n '1,6p'

各LC_*の有効値がCとなる表示

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-102-1058

EnvironmentPOSIX locale / 子プロセス環境だけ変更

Last technical review2026-08-13

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