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Top 23 PostgreSQL Interview Questions and Answers

11/May/2021 | 10 minutes to read

Here is a List of essential PostgreSQL Interview Questions and Answers for Freshers and mid level of Experienced Professionals. All answers for these PostgreSQL questions are explained in a simple and easiest way. These questions will help you to clear your next Job interview.

PostgreSQL Interview Questions

PostgreSQL Interview Questions and Answers

These questions are targeted for PostgreSQL Database developer or Database Administrator. You must know the answers of these PostgreSQL questions to clear the interview.

1. What is PostgreSQL database?

PostgreSQL sometimes called as POSTGRES is an open-source relational database management system. It's free and most advanced relational database emphasizing SQL compliance. It provides huge number of functionalities to it's users.
PostgreSQL is very stable database management system. It provides transactions with ACID properties. You can perform all common operations like query, filter, join, grouping, subquery on PostgreSQL similar to other databases like SQL Server, MySQL and Oracle.

2. Explain the PostgreSQL Architecture.

3. Explain PostgreSQL Performance tuning.

4. Explain some features of PostgreSQL?

5. What are different data types in PostgreSQL?

6. How to change column's data type in PostgreSQL?

7. What is dual table in PostgreSQL? What is the use of it?

8. How PostgreSQL is different from SQL Server?

9. How to select top 10 records in PostgreSQL?

10. Explain PostgreSQL Inheritance. How PostgreSQL implements table inheritance? What is the use of it?

11. Explain Table Partitioning in PostgreSQL.

12. What is the benefit of Table Partitioning in PostgreSQL?

13. What do you understand by constrain exclusion in PostgreSQL?

14. How to scale PostgreSQL database?

15. What is the max size of a table in PostgreSQL?

16. What is Planner/Optimizer in PostgreSQL? How to create an optimal execution plan for a query?

17. Explain Genetic Query Optimizer in PostgreSQL.

18. Explain Indices in PostgreSQL.

19. What different types of index does PostgreSQL provide?

Some General Interview Questions for PostgreSQL

1. How much will you rate your self in PostgreSQL?

When you attend an interview, Interviewer may ask you to rate your self in specific Technology like PostgreSQL, So It's depend on your knowledge and work experience in PostgreSQL.

2. What challenges did you face while working on PostgreSQL?

This question may be specific to your technology and completely depends on your past work experience. So you need to just explain the challenges you faced related to PostgreSQL in your Project.

3. What was your role in last Project related to PostgreSQL?

It's based on your role and responsibilities assigned to you and what functionality you implemented using PostgreSQL in your project. This question is generally asked in every interview.

4. How much experience do you have in PostgreSQL?

Here you can tell about your overall work experience on PostgreSQL.

5. Have you done any PostgreSQL Certification or Training?

It's depend on candidate like you have done any PostgreSQL training or certification. Certifications or trainings are not essential but good to have.


We have covered some frequently asked PostgreSQL Interview Questions and Answers to help you for your Interview. All these Essential PostgreSQL Interview Questions are targeted for mid level of experienced Professionals and freshers.
While attending any PostgreSQL Interview if you face any difficulty to answer any question please write to us at Our IT Expert team will find the best answer and will update on portal. In case if we find any new PostgreSQL questions, we will update the same here.

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