noun, noun-modifying (irregular)
Refers to a test or question format where the answer is chosen from given options. Often used attributively (e.g., 多肢選択式の問題).
This exam is multiple-choice.
Please teach me tips for solving multiple-choice questions.
選択式 is a broader term for any selection-based format, while 多肢選択式 specifically means multiple-choice with several options.
Compound of 多肢 (many branches/options) + 選択 (selection) + 式 (style/format).