QABattle

Database Testing / Quiz

Pipeline Cross-Examination

Row counts, checksums, watermarks, and reject files: the reconciliation toolkit that catches an ETL pipeline quietly mangling data.

Difficulty
Medium
Format
Quiz
Points
150
Estimate
10 min

// MISSION BRIEF

Your Mission

An ETL pipeline that "ran successfully" has proven nothing yet. This quiz covers the validation strategy layer by layer: what counts prove and don't, what checksums add, how to reconcile against a moving source, and the silent transformations that corrupt data without failing a job.

Scoring: timed quiz; accuracy first, speed bonus for fast clean runs.

// FIRST CONTACT

Battle teaser

Source row count equals target row count. This proves:

  1. AThe migration is fully correct
  2. BThe pipeline needs no further checks this quarter
  3. CVolume moved, nothing about content: values can be truncated, mis-mapped, or corrupted with counts intact. Necessary, not sufficient
  4. DNothing at all; counts are worthless
Answers, scoring, hints, and the full battle stay sealed.

// SKILL TAGS

etldatabase-testingreconciliationdata-validation