Interview Questions

PostgreSQL Interview Questions (2026): Most Commonly Asked, With Answers

A candidate in a fintech backend loop this April got the SQL right and the reasoning wrong. Asked why SELECT COUNT(*) FROM orders was…

By Shekhar · July 30, 2026

OOPs Interview Questions (2026): 25 Most Asked, With Examples

Java still shows up in the day-to-day work of 29.6 percent of professional developers, according to the 2025 Stack Overflow survey (Stack Overflow, 2025),…

By Dhanush · July 30, 2026

MySQL Interview Questions (2026): 30 Most Asked, With Answers

MySQL usage among developers dropped to 40.5 percent in the 2025 Stack Overflow Developer Survey, second place behind PostgreSQL’s 55.6 percent, a 15-point gap…

By Venkat · July 30, 2026

Maven Interview Questions (2026): Build & Dependency Q&A, With Answers

Maven turned 21 in 2025, and it’s still the build tool most Java shops actually run. JetBrains’ State of Developer Ecosystem 2025 report puts…

By Dhanush · July 30, 2026

Linux Interview Questions (2026): 33 Commands & Scenarios, With Answers

The U.S. Bureau of Labor Statistics expects network and computer systems administrator jobs to shrink 4 percent between 2024 and 2034, even while the…

By Hari · July 30, 2026

Hibernate Interview Questions (2026): Most Asked, With Answers

Hibernate ORM 7.0.0.Final shipped on May 19, 2025, finishing a namespace switch that started with version 6.0: every javax.persistence import became jakarta.persistence, with no…

By Prasanth · July 29, 2026

GraphQL Interview Questions (2026): Most Asked, With Answers

On November 6, 2018, ten companies, Facebook, GitHub, Shopify, Airbnb, Twitter, Coursera, Apollo, Elementl, Hasura, and Prisma, agreed to hand GraphQL over to a…

By Shekhar · July 29, 2026

Elasticsearch Interview Questions (2026): Most Asked, With Answers

Elastic’s own engineering guidance puts a healthy production shard somewhere between 20GB and 40GB, with 50GB quoted as the rough ceiling where things still…

By Prasanth · July 29, 2026

Apache Spark Interview Questions (2026): Must-Know Q&A

Apache Spark’s official docs are versioned 4.1.2 as of this writing, sixteen years after Matei Zaharia and four coauthors described the project in a…

By Dhanush · July 29, 2026

Terraform Interview Questions (2026): IaC Q&A With Examples

Terraform showed up in 18.7 percent of professional developers’ toolchains in the 2025 Stack Overflow Developer Survey, just ahead of Ansible’s 11.2 percent and…

By Venkat · July 29, 2026