Capgemini

Capgemini

Global leader in partnering with companies to transform and manage their business by harnessing the power of technology.

4 Rounds ~21 Days Medium
Start Mock Interview

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

Backend Engineer • Behavioral • medium

Describe your experience working in an Agile/Scrum environment. How do you handle a situation where a client drastically changes requirements in the middle of a sprint?

#Agile #Adaptability
Practice
Backend Engineer • Behavioral • medium

Tell me about a time you disagreed with a client or a product owner regarding a technical requirement. How did you communicate your concerns and reach a resolution?

#Communication #Client Management
Practice
Backend Engineer • Behavioral • medium

As a consultant, you might be assigned to multiple deliverables with conflicting deadlines. How do you prioritize your work and manage stakeholder expectations?

#Time Management #Prioritization
Practice
Backend Engineer • Behavioral • easy

Describe a situation where you had to learn a completely new technology or framework in a very short amount of time to deliver a client project.

#Adaptability #Learning
Practice
Backend Engineer • Behavioral • medium

Tell me about a time you introduced a critical bug into production. How was it discovered, how did you fix it, and what did you learn to prevent it in the future?

#Accountability #Problem Solving
Practice
Backend Engineer • Coding • medium

Given a string, find the length of the longest substring without repeating characters.

#Strings #Sliding Window
Practice
Backend 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. Optimize for time complexity.

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

Given an array of intervals, merge all overlapping intervals and return an array of the non-overlapping intervals.

#Arrays #Sorting
Practice
Backend Engineer • Coding • easy

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.

#Stack #Strings
Practice
Backend Engineer • Coding • hard

Design and implement a data structure for a Least Recently Used (LRU) cache.

#Linked List #Hash Table #Design
Practice
Backend Engineer • Coding • medium

Find the Kth largest element in an unsorted array. Can you do it in O(N) time complexity on average?

#Arrays #Heap #Quickselect
Practice
Backend Engineer • Coding • hard

Given the head of a linked list, reverse the nodes of the list k at a time, and return the modified list.

#Linked List #Recursion
Practice
Backend Engineer • Coding • medium

Given an array of strings, group the anagrams together. You can return the answer in any order.

#Strings #Hash Table
Practice
Backend Engineer • System Design • medium

Design a URL shortening service like Bitly. Focus on the database schema, the hashing algorithm, and how you would handle high read throughput.

#Scalability #Hashing #Databases
Practice
Backend Engineer • System Design • hard

Design a highly available checkout API for an e-commerce client preparing for a Black Friday sale. How do you prevent overselling inventory?

#Concurrency #Caching #Distributed Locking
Practice
Backend Engineer • System Design • medium

In a distributed microservices environment deployed on AWS, how would you design a centralized logging and tracing system to debug cross-service requests?

#Observability #AWS #Microservices
Practice
Backend Engineer • System Design • medium

Design a scalable notification system that can send emails, SMS, and push notifications to millions of users. How do you ensure messages are not sent multiple times?

#Message Queues #Idempotency #Scalability
Practice
Backend Engineer • Technical • medium

What are the different bean scopes in Spring Boot? Explain a scenario where you would use the Prototype scope over the default Singleton scope.

#Spring Boot #Java #Dependency Injection
Practice
Backend Engineer • Technical • medium

Explain how the @Transactional annotation works in Spring Boot. What happens if a transactional method calls another transactional method within the same class?

#Spring Boot #Transactions #AOP
Practice
Backend Engineer • Technical • hard

In a microservices architecture, how do you decide between using synchronous communication (like REST/Feign) versus asynchronous communication (like Kafka/RabbitMQ)?

#Microservices #Kafka #REST
Practice
Backend Engineer • Technical • medium

Explain the difference between standard Threads and CompletableFuture in Java. How would you chain multiple asynchronous API calls?

#Java #Concurrency #Multithreading
Practice
Backend Engineer • Technical • easy

Given a list of Employee objects, write a Java 8 Stream pipeline to filter employees older than 30, extract their names, and collect them into a comma-separated string.

#Java 8 #Streams
Practice
Backend Engineer • Technical • medium

A client wants to build a product catalog for an e-commerce platform with highly variable attributes per category. Would you recommend a relational database or a NoSQL database? Justify your choice.

#SQL #NoSQL #System Design
Practice
Backend Engineer • Technical • medium

How do database indexes work under the hood? What are the performance trade-offs of adding multiple indexes to a highly transactional table?

#SQL #Performance #B-Trees
Practice
Backend Engineer • Technical • hard

How do you handle distributed transactions across multiple microservices? Explain the Saga design pattern and the concept of compensating transactions.

#Microservices #Distributed Systems #Saga Pattern
Practice
Backend Engineer • Technical • medium

What are the best practices for designing a RESTful API? Discuss versioning strategies, pagination, and appropriate use of HTTP status codes.

#REST #Web Services
Practice
Backend Engineer • Technical • medium

How do you secure a public-facing REST API? Explain the flow of OAuth2 and how JWTs are structured and validated.

#OAuth2 #JWT #API Security
Practice
Backend Engineer • Technical • hard

Explain how Garbage Collection works in the JVM. If a client application is experiencing OutOfMemoryError in production, what steps would you take to diagnose and fix the memory leak?

#Java #JVM #Debugging
Practice
Backend Engineer • Technical • medium

Walk me through the process of containerizing a Spring Boot application. What are the key instructions you would include in your Dockerfile to optimize the image size?

#Docker #Spring Boot #CI/CD
Practice
Backend Engineer • Technical • medium

Explain the typical stages of a CI/CD pipeline for a backend Java application. What tools have you used, and how do you handle database migrations in the pipeline?

#CI/CD #Jenkins #Flyway/Liquibase
Practice
Backend Engineer • Technical • hard

How would you implement API rate limiting in a Spring Boot application to prevent abuse? Discuss the Token Bucket algorithm.

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

Explain the CAP theorem. If a client requires a highly available and partition-tolerant system, what database would you choose and what trade-offs in consistency would you have to accept?

#Distributed Systems #CAP Theorem #NoSQL
Practice
Backend Engineer • Technical • easy

With the introduction of default methods in Java 8, what is the practical difference between an abstract class and an interface? When would you choose one over the other?

#Java #OOP
Practice
Backend Engineer • Technical • medium

How do you implement global exception handling in a Spring Boot REST API? Explain the use of @ControllerAdvice and @ExceptionHandler.

#Spring Boot #Error Handling
Practice
Backend Engineer • Technical • medium

What is the N+1 query problem in Hibernate/JPA? How can you detect it, and what are the different ways to resolve it?

#Hibernate #JPA #Performance
Practice

Difficulty Radar

Based on recent AI-sourced data.

Meet Your Interviewers

The "Standard" Interviewer

Senior Engineer

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

Simulate

Unwritten Rules

Think Out Loud

Always explain your thought process before writing code or drawing architecture.

Practice Now