Infosys Interview Experience | Specialist Programmer | Full Time | On Campus | 2025 Batch

Infosys visited VIT Vellore in the last week of July for the role of Specialist Programmer. The selection process began with an Online Assessment (OA) in the first week of August, followed by an On-Site Interview at the Infosys Campus. I opted for the Noida office location, and the interview process was a valuable mix of technical discussions, problem-solving, and conceptual clarity.

Interview Highlights

Resume Discussion

Provided an overview of the projects listed in my resume.

Focused on:

• Challenges faced during development.
• Technologies used to build the projects.
• Project outcomes and learnings.

Machine Learning & ReactJS Terminologies

• I was asked to define key terms related to Machine Learning and ReactJS.
• Questions included both theoretical definitions and their practical applications.

SQL Query

Problem: Write a query to find the 5th highest salary in a database table.

Coding Question 1: Bit Manipulation

Problem: You are given a series of bulbs where each bulb glows based on the number of times a switch is toggled (n).

Task: Determine the glowing pattern of the bulbs for a given number of toggles.

Key Insight: The glowing pattern is derived from the binary representation of n, where bulbs glow only when the binary pattern consists of alternating bits starting from 1.

Coding Question 2: DFS in Graph

Problem: You are given a 2D grid representing a battlefield with warships (represented as 1s) and water (represented as 0s).

Task: Determine the number of distinct warship groups (islands) in the grid. Warships are considered connected if they are adjacent horizontally or vertically.

Key Insight: This is a variation of the classic "Number of Islands" problem. The solution involves using Depth First Search (DFS) to traverse the grid and count connected components.

Operating Systems & OOP Concepts

Questions on:

1. Deadlocks: Their prevention and handling mechanisms.

2. Object-Oriented Programming (OOP) concepts:

• Inheritance
• Polymorphism
• Encapsulation

Future Ambitions

A discussion on:

• My career aspirations.
• Technologies I am passionate about exploring in the future.

Key Takeaways

The interview process was a well-rounded mix of:

• Theoretical concepts: Algorithms, OOP, and Operating Systems.
• Practical problem-solving: Coding challenges like Bit Manipulation and DFS-based problems.
• Thought process clarity: Emphasis on explaining solutions step-by-step while approaching a problem.

Important Tip: Be clear on the basics of data structures, algorithms, and concepts mentioned in your resume. Also, think out loud during coding discussions to showcase your problem-solving approach.

Verdict

Selected