What are the questions asked in technical interviews in 2025?

A technical interview is not just about "showing the code." It is a test of thinking, engineering culture, and the ability to solve real problems. What are they asking in 2025? What skills are really important?

Let's break it down — from algorithms to communicating with the team. Even if you are a junior, it will be useful for you to know what interviewers prepare 😎

🧠 1. Algorithms and data structures

• arrays, strings, hashes

• stacks and queues

• graphs and trees (especially binary)

• dynamic, greedy, backtracking

💡 Important: not just to solve, but to explain, why is it so and what complexity the algorithm gives.

🛠 2. Systems thinking and architecture

Interviewers may ask:

• how to build a REST API

• how to implement caching

• how to design a chat, blog, or news feed

• how to break a monolith into microservices

📌 Even junas can be asked a simple question about design: "How would you store notes with tags?"

🔍 3. Working with databases

SQL is almost always asked. Be able to write:

• JOIN, GROUP BY, HAVING

• nested queries

• working with indexes and normalization

Plus - knowledge of the difference between SQL and NoSQL, basic PostgreSQL or MongoDB architecture.

🧪 4. Testing

• what are unit, integration and e2e tests

• why write tests at all

• what is the difference between TDD and the usual approach

🔥 You may be asked to write a simple test in any language, even if it is not your main one.

🧩 5. Git and version control

• how to do rebase, stash, cherry-pick

• how to cancel a commit

• work with pull requests

🧠 These skills show how well you can work in a team.

💬 6. Ability to explain and communicate

• how would you explain to a junior what Promise is

• how I resolved a conflict in the team

• how do you estimate the task deadline

💡 Soft skills asked almost everywhere — even in technical positions.

📊 Summary: what is important

In projects and courses, we provide not only code, but also thinking: how to explain, choose an approach, ask a good question. This is the skill that gives you +100 to the chance to pass the interview.

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