| id |
challengeType |
videoId |
| 5e7b9f180b6c005b0e76f08c |
11 |
AqdfbrpkbHk |
--question--
--text--
What is the best practice for how many times a piece of string data should be stored in a database?
--answers--
0
1
2
3
--video-solution--
2
--hints--
--solutions--