Databases
13 practice items · needed by 4 roles
Easy 1Medium 4Hard 8
Practice questions
- Connection pools and autoscalinghard
- Profile shows old data after savinghard
- Sharding orders by creation datehard
- Inserts slow down with UUID keyshard
- Pool exhausted during paymentshard
- The N+1 query problemmedium
- Offset vs cursor paginationmedium
- Renaming a column safelymedium
- Two buyers, one item lefthard
- Too many database connectionshard
- Timeouts with a healthy databasemedium
- Rollback blocked by a schema changehard
- Row store or column storeeasy