Practice technical and stakeholder interviews — Smart Study Module 22

An interviewer is testing how you reason, not just whether you remember a function name.

Outcomes

• Explain joins, context and controls
• Answer progressively harder scenarios
• Recognize the limits of timed drills

Understand

For an Excel question, state the dataset grain, exact-match or aggregation choice and one edge case. For SQL joins, explain expected cardinality before writing the query. For DAX, identify the filter context and denominator.

Answer a stakeholder scenario by clarifying the decision and metric definition. If two reports disagree, compare period, population, source freshness and aggregation before blaming a colleague.

Timed practice is optional. A fast answer with no reconciliation is weaker than a correct, explainable answer. This app scores selected learning checks, not employability or interview success.

Follow along

1. Rehearse an Excel missing-ID case.
2. Explain why POS doubled after a join.
3. Explain why a DAX measure changes with a branch slicer.
4. Record one gap and schedule a review of the matching module.

Worked example

Question → assumptions → method → edge case → independent check

A safe January loan-grain report contains four loan records after aggregation and LEFT JOIN.

Practice

How many loan-grain rows should remain in the safe January report?

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