Explain the difference between DataSet and DataReader with

Short answer: examples. DataSet: Works in a disconnected mode and holds multiple tables and relationships. You can navigate and manipulate the data offline. Example: Use a DataSet to hold customer and order data for offline processing. DataReader: A forward-only, read-only cursor that requires an open connection to the database. It is faster for reading large amounts of data in a streaming manner. Example: Use DataReader when…

Explain a bit more

fetching records to display in a report or grid in a single-pass, forward-only manner.

Real-world example (ShopNest)

For large order exports, ShopNest uses SqlDataReader (forward-only, fast). DataSet is heavier and mainly for disconnected editing scenarios.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.