Table 1: ad_info
**** ********* ***** ******** ** *** **
***_**** | ***_**** -----------------+--------------------- **_** | ****** ****_** | ****** ***** | *****
Question 100
Advertiser ROI
Premium Access
Unlock this Facebook 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
- ***** * ***** ** ******* *** *** **** **********.
- ****: ***: ***** ******* (******** *****) / ***** ** *****
- ** ** ***** ****** *** *** **** ** **********, *** *** ** 0.
Table 2: advertiser
***_**** | ***_**** -----------------+--------- **********_** | ****** **_** | ****** **** | *****
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.
10:00
Your results
Run your query to preview results here.