Deloitte

Deloitte

Multinational professional services network with offices in over 150 countries.

4 Rounds ~21 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

Tell me about a time you had to explain a complex technical concept to a non-technical client or stakeholder.

#Client Interaction #Soft Skills
Practice
Software Engineer • Behavioral • medium

Describe a situation where a client changed the project requirements at the last minute. How did you handle it?

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

Tell me about a time you disagreed with a team member or tech lead on a technical approach. How was it resolved?

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

As a consultant, you may be on multiple projects. How do you prioritize your tasks when facing multiple tight deadlines?

#Organization #Deadlines
Practice
Software Engineer • Behavioral • medium

Describe a time you had to learn a completely new technology or framework very quickly to deliver a client project.

#Continuous Learning #Problem Solving
Practice
Software Engineer • Behavioral • medium

Tell me about a time you failed to meet a deadline or deliverable. What happened, and what did you learn?

#Ownership #Project Management
Practice
Software Engineer • Behavioral • easy

Why do you want to work for Deloitte specifically, rather than a traditional tech company?

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

Tell me about a time you identified an inefficiency in a process or codebase and took the initiative to improve it.

#Initiative #Innovation
Practice
Software Engineer • Behavioral • easy

How do you ensure the quality of your code before pushing it to a production environment?

#Testing #Code Review #QA
Practice
Software Engineer • Behavioral • hard

Describe a situation where you had to work with a difficult or demanding client stakeholder. How did you manage the relationship?

#Communication #Empathy #Negotiation
Practice
Software Engineer • Coding • easy

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.

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

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

#Strings #Stacks
Practice
Software Engineer • Coding • medium

Write a SQL query to find the second highest salary from an Employee table.

#Database #Queries #Aggregation
Practice
Software Engineer • Coding • medium

Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals.

#Arrays #Sorting
Practice
Software Engineer • Coding • easy

Write a function to reverse a singly linked list.

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

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

#Strings #Hash Table #Sorting
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 SQL query to find employees who earn more than their managers.

#Database #Self Joins
Practice
Software Engineer • Coding • easy

Given a string, find the first non-repeating character in it and return its index. If it does not exist, return -1.

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

Implement a method to perform basic string compression using the counts of repeated characters (e.g., aabcccccaaa becomes a2b1c5a3).

#Strings #Two Pointers
Practice
Software Engineer • System Design • medium

Design a secure client portal for a financial institution that allows users to upload and process large CSV files (10GB+).

#Asynchronous Processing #Cloud Storage #AWS #Security
Practice
Software Engineer • System Design • medium

Design a URL shortening service like TinyURL.

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

Design the architecture for an e-commerce checkout and payment system.

#Microservices #Distributed Transactions #Message Queues
Practice
Software Engineer • System Design • medium

How would you design a centralized logging and monitoring system for a distributed microservices application?

#Observability #ELK Stack #Distributed Systems
Practice
Software Engineer • System Design • easy

Design a RESTful API for a library management system. What endpoints would you create?

#API Design #Data Modeling
Practice
Software Engineer • Technical • easy

What are the core constraints and principles of a RESTful API?

#REST #HTTP #API Design
Practice
Software Engineer • Technical • medium

How does Garbage Collection work in your primary programming language (Java/Python)?

#Memory Management #Performance
Practice
Software Engineer • Technical • easy

What is the difference between an Abstract Class and an Interface in Java, and when would you use each in an enterprise application?

#Java #OOP #Design
Practice
Software Engineer • Technical • medium

Explain Dependency Injection and how it is implemented in the Spring Boot framework.

#Spring Boot #Design Patterns #Inversion of Control
Practice
Software Engineer • Technical • medium

Explain the differences between SQL and NoSQL databases. When would you choose one over the other for a client project?

#SQL #NoSQL #Data Modeling
Practice
Software Engineer • Technical • medium

How do you handle global exceptions in a Spring Boot REST API?

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

What is CI/CD? Describe a pipeline you have set up or worked with.

#CI/CD #Jenkins #Git #Deployment
Practice
Software Engineer • Technical • hard

What are microservices? What are the main challenges when migrating from a monolithic architecture to microservices?

#Microservices #Distributed Systems
Practice
Software Engineer • Technical • easy

What is the difference between an HTTP GET and POST request?

#HTTP Methods #REST
Practice
Software Engineer • Technical • hard

How would you approach optimizing a slow-performing SQL query in a production database?

#Performance Tuning #Indexes #Execution Plans
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.

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