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Data Engineer Interview Questions

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Data Engineer Interview Questions

Data engineers are IT professionals who are needed in almost every industry. Data engineers monitor data trends to determine best next steps for companies. A critical part of a data engineer job is to process raw data into usable data by creating data pipelines and building data systems.

Top Data Engineer Interview Questions & How To Answer

Question 1

Question #1: Can you describe in detail your level of expertise with programming languages?

How to answer
How to answer: Before the interview, review your resume and/or portfolio and make a list of the programs you are most proficient with. If you find that you are lacking the expertise in a program that the company predominately uses, describe yourself as a highly motivated self-starter who will work tirelessly to learn the program(s).
Question 2

Question #2: Explain data engineering in your own words.

How to answer
How to answer: Highlight your role in relation to the larger organization and other roles like data scientists to clearly define your contribution to the overall system of business. Clarify the difference between a database-centric engineer and a pipeline-centric engineer.
Question 3

Question #3: Can you describe your experience working with Apache Hadoop and cloud data management environments?

How to answer
How to answer: Research the company's software, data cloud products, and use of Apache Hadoop to be prepared for this inquiry. Data Engineers must be fluent in programming languages and data management systems used throughout the industry such as Apache Hadoop.

20,192 data engineer interview questions shared by candidates

General questions for screening Fairly difficult python coding test Extremely difficult & intense interview with the 2 company founders, one of them was constantly on his phone within 2 sec of the interview and through out and the other one kept firing very difficult questions.
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Lead Data Engineer

Interviewed at Energy Aspects

3.5★
Apr 24, 2019

General questions for screening Fairly difficult python coding test Extremely difficult & intense interview with the 2 company founders, one of them was constantly on his phone within 2 sec of the interview and through out and the other one kept firing very difficult questions.

The first round you will asked the following question. 1. Explain about the tera sort that happens between the map and reduce phase in hadoop job. 2. Explain about class loader, can you have more than one class loader in jvm. 3. Explain how indexing in implemented in sql databases, be prepared to take about b-tree and tree balancing algorithm. 4. How does java guarantee the hashmap look up in O(1). Round 2 1. You will asked to write java streaming code to parse infinite input while keeping memory low the output should predefined length of random sample.
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Big Data Engineer

Interviewed at ResearchGate

3★
Oct 1, 2017

The first round you will asked the following question. 1. Explain about the tera sort that happens between the map and reduce phase in hadoop job. 2. Explain about class loader, can you have more than one class loader in jvm. 3. Explain how indexing in implemented in sql databases, be prepared to take about b-tree and tree balancing algorithm. 4. How does java guarantee the hashmap look up in O(1). Round 2 1. You will asked to write java streaming code to parse infinite input while keeping memory low the output should predefined length of random sample.

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Glassdoor has 20,192 interview questions and reports from Data engineer interviews. Prepare for your interview. Get hired. Love your job.