Checking hosts before DNS | LinuC Level 1 102 Exam original practice question

1.07.2Basic

Resolve names by checking /etc/hosts first and DNS second.

Choose the hosts line in /etc/nsswitch.conf.

Which line is appropriate?

Hint 1: Focus on configuration scope

Separate interface state, saved connection profiles, local name resolution, and routing before comparing the commands.

Hint 2: Key terms

Review the short definitions of interfaces, profiles, name resolution, and routes involved.

/etc/nsswitch.conf: A configuration file that defines information sources and lookup order.
hosts: The nsswitch database entry for host-name resolution.
files: A source specification that uses local files such as /etc/hosts.
dns: A source specification that uses DNS resolution.
Source order: The left-to-right order in which name-resolution sources are tried.

Detailed explanation

Incorrecthosts: dns files

Incorrect. It checks DNS before local files.

Incorrecthosts = files,dns

Incorrect. nsswitch.conf does not use this equals-and-comma form.

Incorrectnameserver: files dns

Incorrect. The database name should be hosts, not nameserver.

Correcthosts: files dns

Correct. files is tried before dns.

An example you can run in a temporary verification environment.

printf '%s
' 'hosts: files dns' | awk -F: '{print $1 ":" $2}'

hosts: files dns

Foundation review

A host attachment whose link state and addresses can be managed.

Saved settings used to activate a persistent network connection.

Rules that select the next hop for each destination network.

Question IDKL-102-972

EnvironmentPOSIX awk / 一時標準入力のみ

Last technical review2026-08-13

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