Using stratified sampling | AWS Certified AI Practitioner (AIF-C01) original practice question

1.2Standard

Rare classes and regions must appear in evaluation.

Preserve representation.

Choose two practices.

Hint 1: Focus on the requirement

Identify what must change and what must remain unchanged. Then choose the command whose scope matches that requirement.

Hint 2: Check each command's role

Separate commands that display information, change state, remove data, or affect a child process.

Detailed explanation

CorrectDefine class, region, or time strata and check distributions and counts in each split

Rare strata are retained.

CorrectCheck duplicates, groups, and time boundaries before splitting

Independence is preserved.

IncorrectStratification permits one user across every split

Group leakage is separate.

IncorrectA different production distribution is acceptable if counts match

Representativeness is lost.

An example you can run in a temporary verification environment.

AWS公式AIF-C01 Domain 1.2のサンプリング、データ分割、代表性を確認する。

少数層を保ちながら、重複・時系列・本番分布を考慮して分割できる。

Foundation review

Check whether the command acts on the current shell, a new process, an existing process, or a file.

Use the supplied command and compare the output with the expected result.

Question IDAWS-AIF-473

EnvironmentAWS公式AIF-C01試験ガイドとAWS公式ドキュメントの確認

Last technical review2026-08-20