Infosys Specialist Programmer Interview Experience 2025

Infosys Specialist Programmer Interview Experience 2025: In this post we have cover recent Infosys Specialist Programmer Interview Experience one of the candidates.

Role: Specialist Programmer
Mode: Virtual (Microsoft Teams)
Duration: 1 Hour 30 Minutes
Interview Type: Technical + Project-Based + DSA

After clearing the Online Assessment, I was shortlisted for the technical interview round, which was conducted virtually via Microsoft Teams. The panelist started with the standard “Tell me about yourself” prompt, where I briefly introduced my educational background, technical interests, and hands-on experience.

💼 Internship Experience – .NET/Backend Developer

The interviewer asked in-depth questions related to my internship as a backend developer. Key questions included:

• What is an API and how does it work?
• Explain middleware in backend development.
• How do you handle exceptions in .NET?
• What is dependency injection and why is it important?
• What is Swagger and how is it used in API documentation?

💡 Personal Projects Discussion

Next, we talked about my React.js-based project. I explained the project flow and features. The interviewer then focused on core React concepts:

• What are React Hooks?
• Explain the use of Fragments.
• Describe the React component lifecycle.
• What is the Virtual DOM and how does it optimize performance?

📊 SQL Concepts

The discussion then moved to SQL fundamentals, where I was asked:

• What are transactions in SQL?
• Explain ACID properties.
• Different types of JOINs in SQL.
• What is a self-join and where is it used?

🧠 SQL Problem Asked:

Using the given Employee and Department tables, I was asked to write a query to list the top three salaries per department. This tested my knowledge of window functions, ranking, and joins.

🔍 DSA Questions (Based on LeetCode Tags: HashMap, Greedy, Kadane’s Algorithm)

1. [Pair Matching Problem]
   Check if an array can be divided into n pairs such that each pair contains equal elements.
   Example:
   Input: [3,2,3,2,2,2] → Output: true
2. [Candy Discount Problem – Greedy]
   Minimize the cost of candies where every 3rd candy is free under specific conditions.
   Example:
   Input: [6,5,7,9,2,2] → Output: 23
3. [Maximum Subarray – Kadane’s Algorithm]
   Classic DP problem to find the subarray with the maximum sum.
   Problem Link

✅ Final Thoughts

The interview was balanced across backend fundamentals, frontend project experience, SQL, and DSA. Make sure to brush up on your project details, core CS concepts, and practice LeetCode-style problems to succeed. The panel was friendly and focused more on understanding how I approach problems and structure my thoughts.

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