PwC
PricewaterhouseCoopers, a multinational professional services network.
4 Rounds
~21 Days
Medium
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
Full Stack Engineer
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Behavioral
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medium
Tell me about a time you had to push back on a client's technical request because you knew it wasn't the best solution.
#Communication
#Consulting
#Negotiation
Full Stack Engineer
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Behavioral
•
easy
Describe a situation where you had to learn a new technology or framework very quickly to deliver a project.
#Learning
#Agile
#Resilience
Full Stack Engineer
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Behavioral
•
medium
Tell me about a time you found a critical bug right before a major deployment. How did you handle it?
#Debugging
#Pressure
#Risk Management
Full Stack Engineer
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Behavioral
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hard
Working at PwC means handling highly sensitive financial data. How do you incorporate security and data privacy into your daily development routine?
#Data Privacy
#Compliance
#DevSecOps
Full Stack Engineer
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Behavioral
•
medium
Describe a time you disagreed with a senior engineer or architect on a system design choice. How was it resolved?
#Conflict Resolution
#Communication
#Leadership
Full Stack Engineer
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Behavioral
•
easy
Tell me about a time you mentored a junior developer or helped a peer overcome a technical blocker.
#Mentorship
#Collaboration
#Empathy
Full Stack Engineer
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Behavioral
•
easy
Why do you want to work as a Full Stack Engineer at PwC, and how do your values align with the PwC Professional framework?
#PwC Professional
#Values
#Motivation
Full Stack Engineer
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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 Map
Full Stack Engineer
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Coding
•
easy
Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
#Strings
#Stack
Full Stack Engineer
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Coding
•
medium
Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals, and return an array of the non-overlapping intervals that cover all the intervals in the input.
#Arrays
#Sorting
Full Stack Engineer
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Coding
•
medium
Design a data structure that follows the constraints of a Least Recently Used (LRU) cache.
#Design
#Linked List
#Hash Map
Full Stack Engineer
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Coding
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medium
Given an array of strings strs, group the anagrams together. You can return the answer in any order.
#Strings
#Hash Map
Full Stack Engineer
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Coding
•
easy
Given the head of a singly linked list, reverse the list, and return the reversed list.
#Linked List
Full Stack Engineer
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Coding
•
medium
Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element.
#Heap
#Sorting
#Divide and Conquer
Full Stack Engineer
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Coding
•
medium
Write a custom React hook (e.g., useFetch) that fetches data from an API, handles loading state, and catches errors.
#React
#Custom Hooks
#API
Full Stack Engineer
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Coding
•
easy
Write a SQL query to find the second highest salary from an Employee table.
#Queries
#Aggregation
Full Stack Engineer
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System Design
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medium
Design a RESTful API for a client onboarding system. What endpoints would you create and what HTTP methods would you use?
#REST
#Backend
#HTTP
Full Stack Engineer
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System Design
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hard
Design a secure document management system for auditing purposes where users can upload, view, and sign PDFs.
#Microservices
#Storage
#Security
#AWS/Azure
Full Stack Engineer
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System Design
•
medium
Design a URL shortener service like Bitly.
#Hashing
#Scalability
#Databases
Full Stack Engineer
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System Design
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hard
How would you design a microservices architecture for an enterprise expense tracking application?
#Microservices
#Event-Driven
#API Gateway
Full Stack Engineer
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System Design
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medium
Design a real-time notification system to alert consultants about upcoming tax deadlines.
#WebSockets
#Pub/Sub
#Push Notifications
Full Stack Engineer
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System Design
•
medium
Explain how you would implement caching in a high-traffic enterprise application to reduce database load.
#Caching
#Redis
#Performance
Full Stack Engineer
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System Design
•
medium
Design a scalable logging and monitoring solution for a distributed microservices ecosystem.
#Logging
#Observability
#ELK Stack
Full Stack Engineer
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Technical
•
easy
Explain the difference between the Virtual DOM and the Real DOM in React.
#React
#DOM
Full Stack Engineer
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Technical
•
medium
How do you manage state in a large-scale enterprise React application?
#React
#State Management
#Redux
#Context API
Full Stack Engineer
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Technical
•
medium
Explain the lifecycle hooks in Angular and provide a scenario where you would use ngOnChanges.
#Angular
#Lifecycle
Full Stack Engineer
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Technical
•
medium
A client complains that their web portal is loading very slowly. Walk me through the steps you would take to diagnose and optimize it.
#Optimization
#Frontend
#Network
Full Stack Engineer
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Technical
•
medium
What is the difference between Promises and Observables? When would you use one over the other?
#Asynchronous
#RxJS
#Angular
Full Stack Engineer
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Technical
•
medium
What is CORS, why does it exist, and how do you resolve CORS errors in a full-stack application?
#CORS
#HTTP
#Security
Full Stack Engineer
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Technical
•
medium
How does Node.js handle concurrency despite being single-threaded?
#Node.js
#Event Loop
#Architecture
Full Stack Engineer
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Technical
•
medium
Explain the difference between clustered and non-clustered indexes in SQL Server or PostgreSQL.
#Databases
#Indexing
#Performance
Full Stack Engineer
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Technical
•
medium
How do you secure a REST API? Explain how JWT works in an enterprise application.
#JWT
#OAuth
#API Security
Full Stack Engineer
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Technical
•
easy
Explain Dependency Injection and its benefits in a framework like .NET Core or Spring Boot.
#Design Patterns
#OOP
#Inversion of Control
Full Stack Engineer
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Technical
•
easy
What are the ACID properties in a database? Why are they important for financial applications?
#ACID
#Transactions
#Data Integrity
Full Stack Engineer
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Technical
•
hard
How do you handle database schema migrations in a CI/CD pipeline without causing downtime?
#CI/CD
#Databases
#Deployment
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
SimulateUnwritten Rules
Think Out Loud
Always explain your thought process before writing code or drawing architecture.