Lead Data Engineering Interview Questions (With Answers)

15 Questions asked

Mar 2026 First seen

Apr 2026 Last seen

15 Unique questions

🥧 Difficulty mix

How hard are these questions?

Easy 1 (7%)Medium 10 (67%)Hard 4 (27%)

📊 Question type

Breakdown by interview phase

🔥 12-week activity

When candidates are asked these

Last 12 weeks →

🏷️ Top topics

Where these questions cluster

Sql 3

Data Analysis 3

Requests 3

Percentage 2

Devops 2

Joins 1

Http 1

Troubleshooting 1

👤 Experience level mix

What seniority these are asked at

Fresher (0-1yr) 1Junior (1-3yr) 8Mid (3-6yr) 2Senior (6+yr) 4

📝 Recent questions

Latest 10 asked by candidates

🟡 Medium ✅

Given the table of user interactions with actions 'sent' and 'accepted', how would you find pairs of users who have not performed both actions on the same day?

Sql Data Analysis Joins

Coding · Asked 1× · Apr 2026

🟡 Medium ✅

Out of those four requests, only one has been received. What could be the reasons for this, and how would you troubleshoot it?

Http Requests Troubleshooting

Conceptual · Asked 1× · Apr 2026

🟡 Medium ✅

How would you determine the acceptance time for each request, given that each request is accepted two days, five days, or ten days after being sent?

Time Data Analysis Requests

Conceptual · Asked 1× · Apr 2026

🟡 Medium ✅

Initially, we will aggregate the data. If we look at the data, we see that four requests were sent on January 4, 2020. How would you aggregate this data to analyze request patterns?

Data Aggregation Sql Requests

Conceptual · Asked 1× · Apr 2026

🟡 Medium ✅

Give PySpark code to calculate the friend acceptance rate for each date when friend requests were sent. A request is sent if action = 'sent' and accepted if action = 'accepted'. If a request is not accepted, there is no record of it being accepted in the table. The output should only include dates where requests were sent and at least one of them was accepted (acceptance can occur on any date after the request is sent).

Pyspark Dataframes Aggregation

Coding · Asked 1× · Apr 2026

🟢 Easy ✅

If you have four total records and only three sets are returned, how do you calculate the percentage of records retrieved?

Percentage Data Retrieval Basic Math

Conceptual · Asked 1× · Apr 2026

🟡 Medium ✅

If you have 4 items and a 3‑month success rate of 100%, how would you calculate the percentage of exceptions that are below 0.75?

Percentage Exception Handling Data Analysis

Conceptual · Asked 1× · Apr 2026

🟡 Medium ✅

In the fourth scenario, how would you request 10 repositories? Refer to the second example.

Repository Api Pagination

Conceptual · Asked 1× · Apr 2026

🟡 Medium ✅

What steps would you take to ensure 100% success when recording a particular technical process?

Process Success Rate Technical Recording

Conceptual · Asked 1× · Apr 2026

🔴 Hard ✅

How do you develop pipelines in application in data engine projects, develop pipelines, deploy them at the end, and make them move into production?

Pipelines Devops Devops

System Design · Asked 1× · Mar 2026

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