Senior Data Engineer Interview Questions

2,565 senior data engineer interview questions shared by candidates

First interview had general screening questions about experience and motivation. Tech interview was a time-limited challenge that you need to practice in order to feel comfortable and make quick decisions. Second tech interview is about SQL and things that every experienced SQL engineer should know, so refresh fundamentals.
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Senior Data Engineer

Interviewed at Peter Park System

4.4
Feb 20, 2026

First interview had general screening questions about experience and motivation. Tech interview was a time-limited challenge that you need to practice in order to feel comfortable and make quick decisions. Second tech interview is about SQL and things that every experienced SQL engineer should know, so refresh fundamentals.

SQL Query Writing: **TABLE A** Columns: Col1 col2 Col3 Data: 1 ABCD 987 1 CDER 234 1 MBCV 444 1 VCXDF 345 **TABLE B** Columns: Col1 col4 Col5 Data: 1 cd 123 1 VG 876 1 XX 456 1 CC 765 Task: Implement Inner join, Left Outer join and Full outer join and provide the number of output records for each type of join?
Apr 8, 2024

SQL Query Writing: **TABLE A** Columns: Col1 col2 Col3 Data: 1 ABCD 987 1 CDER 234 1 MBCV 444 1 VCXDF 345 **TABLE B** Columns: Col1 col4 Col5 Data: 1 cd 123 1 VG 876 1 XX 456 1 CC 765 Task: Implement Inner join, Left Outer join and Full outer join and provide the number of output records for each type of join?

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