Preparing Practice Exam…
Please wait a moment while the system generates the exam questions, answers, and study session.
Please wait a moment while the system generates the exam questions, answers, and study session.
Question 50 of 118
Free Preview · 118 of 392 · questions 1–118 of 392 are free. Sign up free to sync your progress across devices.
Select one answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
- F.when(cond, value) and chainable .when or .otherwise implement CASE WHEN semantics. Example: F.when(col('age') < 18, 'minor').when(col('age') < 65, 'adult').otherwise('senior').