Infosys

Infosys

Global leader in next-generation digital services and consulting.

3 Rounds ~14 Days Medium
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The Interview Loop

Recruiter Screen (30 min)

Standard fit check, behavioral questions, and resume overview.

Technical Loop (3-4 Rounds)

Deep dive into domain knowledge, coding, and system design.

Interview Question Bank

Software Engineer • Behavioral • medium

Infosys often requires engineers to adapt to new tech stacks. Tell me about a time you had to learn a new technology quickly to deliver a client project.

#Adaptability #Continuous Learning
Practice
Software Engineer • Behavioral • medium

Infosys deals with many enterprise clients. How would you handle a situation where the client drastically changes the requirements two days before a major sprint delivery?

#Client Management #Agile #Communication
Practice
Software Engineer • Behavioral • medium

Describe a time you disagreed with a senior team member or tech lead on a technical approach. How did you resolve it?

#Conflict Resolution #Teamwork
Practice
Software Engineer • Behavioral • easy

Why do you want to join Infosys, and how do your career goals align with our core values?

#Company Knowledge #Motivation
Practice
Software Engineer • Behavioral • medium

Explain the most challenging bug you faced in your recent project. How did you debug and resolve it?

#Problem Solving #Debugging
Practice
Software Engineer • Coding • medium

Find the length of the longest substring without repeating characters.

#Strings #Sliding Window #Hash Table
Practice
Software Engineer • Coding • easy

Write a program to reverse a string in-place without using any built-in library functions.

#Strings #Two Pointers
Practice
Software Engineer • Coding • easy

Find the second largest element in an unsorted integer array in O(n) time complexity.

#Arrays #Optimization
Practice
Software Engineer • Coding • easy

Write a function to check if a given string is a valid palindrome, ignoring non-alphanumeric characters and case.

#Strings #Two Pointers
Practice
Software Engineer • Coding • easy

Given an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing from the array.

#Arrays #Math #Bit Manipulation
Practice
Software Engineer • Coding • medium

Write a program to detect if there is a cycle in a singly linked list.

#Linked Lists #Two Pointers
Practice
Software Engineer • Coding • medium

Merge two sorted arrays into a single sorted array without using extra space.

#Arrays #Sorting
Practice
Software Engineer • Coding • easy

Find the first non-repeating character in a string and return its index. If it doesn't exist, return -1.

#Strings #Hash Table
Practice
Software Engineer • Coding • medium

Implement a Stack using two Queues.

#Stack #Queue #Data Structures
Practice
Software Engineer • Coding • easy

Given an array of integers and a target sum, return the indices of the two numbers that add up to the target.

#Arrays #Hash Table
Practice
Software Engineer • Coding • medium

Write the code to implement a thread-safe Singleton design pattern in Java.

#Singleton #Multithreading
Practice
Software Engineer • Coding • medium

Given a list of Employee objects, write a Java 8 Stream API snippet to filter employees older than 30 and collect their names into a List.

#Java 8 #Streams API #Lambdas
Practice
Software Engineer • Coding • medium

Write a SQL query to find the 3rd highest salary from an Employee table without using the LIMIT keyword.

#SQL Queries #Subqueries #Window Functions
Practice
Software Engineer • Coding • easy

What are the different types of JOINs in SQL? Write a query using a LEFT JOIN to find all customers who have not placed any orders.

#Joins #Data Retrieval
Practice
Software Engineer • System Design • medium

Design a URL shortening service like TinyURL. What database would you choose and why?

#Scalability #Database Design #Hashing
Practice
Software Engineer • System Design • hard

How would you design a scalable e-commerce checkout system that handles high traffic during a flash sale?

#Microservices #Message Queues #Concurrency
Practice
Software Engineer • System Design • medium

Explain how you would implement rate limiting for a public-facing API.

#API Gateway #Security #Algorithms
Practice
Software Engineer • Technical • medium

Explain the difference between an Abstract Class and an Interface in Java. How has this changed since Java 8?

#OOPs #Java 8 Features
Practice
Software Engineer • Technical • medium

How does a HashMap work internally in Java? What happens when there is a collision?

#Collections Framework #Data Structures
Practice
Software Engineer • Technical • easy

Explain the concepts of Compile-time and Run-time Polymorphism with real-world examples.

#Polymorphism #Method Overloading #Method Overriding
Practice
Software Engineer • Technical • easy

What are the differences between Checked and Unchecked exceptions in Java? When would you use each?

#Exception Handling
Practice
Software Engineer • Technical • easy

What is the difference between the '==' operator and the '.equals()' method in Java?

#String Pool #Object Comparison
Practice
Software Engineer • Technical • medium

Explain how Garbage Collection works in Java. What are the different types of Garbage Collectors?

#JVM #Memory Management
Practice
Software Engineer • Technical • medium

How do you handle exceptions globally in a Spring Boot application?

#Exception Handling #REST APIs
Practice
Software Engineer • Technical • easy

What is the exact difference between @Controller and @RestController in Spring Boot?

#Annotations #Spring MVC
Practice
Software Engineer • Technical • medium

In a Microservices architecture, how do different services communicate with each other?

#Architecture #REST #Message Brokers
Practice
Software Engineer • Technical • medium

Explain the concepts of Inversion of Control (IoC) and Dependency Injection (DI) in the context of the Spring Framework.

#Core Spring #Design Patterns
Practice
Software Engineer • Technical • easy

Explain the differences between TRUNCATE, DELETE, and DROP commands in SQL.

#DDL #DML
Practice
Software Engineer • Technical • easy

Explain the ACID properties in a Database Management System.

#Transactions #Database Theory
Practice
Software Engineer • Technical • medium

What is indexing in a database? How does it improve performance, and what are its drawbacks?

#Performance Tuning #Indexing
Practice

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The "Standard" Interviewer

Senior Engineer

Focuses on core competencies, system constraints, and clear communication.

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Think Out Loud

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