How to Prepare for Coding Interviews and Technical Assessments

Technical testing is one of the most challenging parts of the interview process for developers. It is not only about solving problems, but demonstrating your logical thinking, problem-solving ability and deep knowledge of algorithms and data structures. In this article, I will share practical tips to improve these tests, with a special focus on genuine learning and the development of real skills.

1. Focus on genuine learning, not on shortcuts#

One of the most common mistakes is to rely on tools such as artificial intelligence to solve problems. While AI can help you understand initial concepts, using it to program during your preparations deprives you of the opportunity to develop your own reasoning. Do not use AI to write code during your internship. Instead, try to solve problems by yourself, even if it takes more time. The goal is to build intuition and confidence in your skills.

2. Read and Analyze Other Developers' Code#

One of the best ways to improve is to study how others solve problems. It takes time to read open source in GitHub repositories, especially in projects related to algorithms and data structures. It looks for solutions in languages that dominate and compares different approaches. This not only teaches you efficient patterns, but also exposes you to varied code styles.

Practical advice: Select a problem that you have solved and look for how others did it. Ask yourself: Why is your solution more efficient? What concepts did they apply that I did not consider?

3. Practice Algorithms and Data Structures Daily#

Technical assessments usually focus on fundamentals such as arrays, linked lists, trees, graphs, search and ordering algorithms. It is not enough to know the theory; you need to apply it in real problems.

• Start with the basics: If you don't master the fundamentals, dedicate time to them before moving on to complex problems.
• Solves varied problems: Mix easy, medium and difficult problems to simulate real interviews.
• Take notes: After each session, write down what concepts cost you the most and review them.

4. Simulate real interviews#

Practice in an environment that simulates the pressure of an interview. Set a timer and solve problems without distractions. Then, explain your solution aloud, as if you were talking to an interviewer. This improves your communication and helps you identify gaps in your reasoning.

5. Recommended Platforms for Practice#

There are several platforms dedicated to the preparation of technical assessments. Here are some that I recommend:

• LeetCode: Excellent for algorithm problems with a large community and detailed explanations.
• HackerRank: It offers challenges in multiple languages and topics, including SQL and web development.
• CodeSignal: Focused on technical interviews with progressive problems and immediate feedback.
• GeeksforGeeks: Useful for combined theory and practice, with step-by-step explanations.

Choose one or two platforms and be consistent. Do not disperse trying to cover all; quality exceeds quantity.

6. Learn from your mistakes and improve your efficiency#

After solving a problem, check optimal solutions if yours was not. It analyzes time and space of complexity. Over time, you will learn to identify patterns and optimize your solutions from the beginning.

Additional Idea: Form a study group with other developers. Sharing solutions and discussing approaches accelerate learning and expose you to different perspectives.

Frequently asked questions#

What topics are included in a technical test? Most of them revolve around algorithms and data structures: arrays, strings, hash tables, recursion and complexity (Big O). I have a complete guide to logic and data structures that covers just that, with a curriculum.

How do I prepare for a technical interview from scratch? Practice one problem a day, read someone else's code and simulate interviews with time. If you still falter with the language, it first reinforces the bases with these tips to improve programming.

Is it wrong to use AI to solve practice challenges? To learn, yes: it robs you of the muscle of reasoning under pressure, which is just what they evaluate. Use it to review your solution after trying, not to skip the process.

Conclusion#

Preparing for technical assessments requires dedication and constant practice, but the effort is worth it. Remember, the goal is not only to pass the interview, but to become a better programmer. Avoid shortcuts such as AI and focus on reading code, practicing daily, and learning from the community. With patience and perseverance, you will see significant improvements in your skills.