Data Quality
17 practice items · needed by 8 roles
Easy 2Medium 6Hard 9
Practice questions
- Unexpected group sizeshard
- Daily batch missing late eventshard
- Revenue doubled after a joinmedium
- Report total does not match financemedium
- Daily numbers do not matchhard
- Latest order changes between runshard
- Uneven groups in a 50/50 testhard
- Built-in dbt testseasy
- Detecting stale source datamedium
- What a data contract doesmedium
- Upstream renamed a columnhard
- An uneven 50/50 splitmedium
- A suspicious jump in active usershard
- A suspicious drop in the datahard
- Duplicate customer recordshard
- Duplicate CRM recordseasy
- Bad data in the CS platformmedium