Table: apple_search
****** ** ** *** ********* ** ******* ******: --0: *******, 1, *******
***_**** | ***_**** -------------------------+-------------------------- ******_** | **** **_*******_******_** | ******** --0: *******, 1, *******
Question 204
AB testing sanity check
Premium Access
Unlock this Apple interview question.
Sign in or upgrade to practice this question with full datasets, official solutions, and guided walkthroughs.
- 230+ interview questions
- Official solutions
- SQL, Python, and R tracks
************
- **********:
- ** *** ****** **** (****** ******_**) ******* *** *** ****** ** ******* **** 5%, ** ****** *** *** ****** **** ***** ****
- ***** * ***** ** ******* *** ********** ** ****** **** ******* *** *** ****** ***** *** ********* *******:
- (****** **** ** ******* - ****** **** ** *******) * 100.0 / ****** **** ** *******.
Sample results
Last Submission
postgresNo submission yet for this engine. Run and submit your query to save it here.
Copied
Expected results
Submit a query to compare against expected output.
Interview timer
Recommended interview pacing
Easy: 5 min for direct warm-up style questions.
Medium: 10 min for multi-step interview queries.
Hard: 15 min for layered questions with tighter time pressure.
A common bar is solving about 2 medium-or-harder questions in a 30 minute interview.
5:00
Your results
Run your query to preview results here.