PwC

PwC

PricewaterhouseCoopers, a multinational professional services network.

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

Backend Engineer • Behavioral • medium

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

#Communication #Stakeholder Management #Consulting
Practice
Backend Engineer • Behavioral • medium

Describe a situation where you had to push back on a client's or product manager's request because it would compromise system security or performance.

#Conflict Resolution #Security #Integrity
Practice
Backend Engineer • Behavioral • easy

PwC values 'Global Acumen'. Tell me about a time you worked with a distributed team across different time zones to deliver a backend feature.

#Collaboration #Remote Work #Agile
Practice
Backend Engineer • Behavioral • medium

Tell me about a time you identified a bottleneck in an existing legacy system and took the initiative to refactor it.

#Initiative #Performance Optimization #Legacy Code
Practice
Backend Engineer • Behavioral • medium

How do you handle changing requirements from a client midway through a sprint?

#Agile #Adaptability #Client Management
Practice
Backend Engineer • Behavioral • medium

Describe a time you failed to meet a deadline for a critical API delivery. What happened and how did you communicate it?

#Accountability #Communication #Failure
Practice
Backend Engineer • Behavioral • easy

Tell me about a time you mentored a junior developer on backend best practices.

#Mentorship #Code Review #Team Building
Practice
Backend Engineer • Behavioral • easy

Why PwC? How does our technology consulting practice align with your career goals?

#Career Goals #Company Knowledge #Motivation
Practice
Backend Engineer • Coding • easy

Given an array of integers, return indices of the two numbers such that they add up to a specific target.

#Arrays #Hash Map
Practice
Backend Engineer • Coding • easy

Write a function to check if a given string containing brackets is valid (properly closed and nested).

#Strings #Stack
Practice
Backend Engineer • Coding • medium

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

#SQL #Database Queries
Practice
Backend Engineer • Coding • medium

Given a list of intervals, merge all overlapping intervals.

#Arrays #Sorting
Practice
Backend Engineer • Coding • medium

Implement a LRU (Least Recently Used) Cache.

#Design #Hash Map #Doubly Linked List
Practice
Backend Engineer • Coding • medium

Write a SQL query to find all departments that have less than 3 employees.

#SQL #Aggregation #Joins
Practice
Backend Engineer • Coding • medium

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

#Strings #Sliding Window #Hash Map
Practice
Backend Engineer • Coding • easy

Write a function to reverse a singly linked list.

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

Given an array of strings, group the anagrams together.

#Strings #Hash Map #Sorting
Practice
Backend Engineer • Coding • medium

Find the lowest common ancestor of two nodes in a binary search tree.

#Trees #Binary Search Tree #Recursion
Practice
Backend Engineer • System Design • hard

Design a scalable document management system for auditing purposes where users can upload, search, and retrieve large PDF files.

#Storage #Search #Microservices #Security
Practice
Backend Engineer • System Design • medium

Design a rate limiter for a public-facing API to prevent abuse from third-party consumers.

#API Gateway #Caching #Algorithms
Practice
Backend Engineer • System Design • hard

How would you design a distributed logging and monitoring system for a microservices architecture spanning multiple cloud regions?

#Observability #Logging #Distributed Systems
Practice
Backend Engineer • System Design • hard

Design an ETL pipeline that ingests daily transaction files from multiple financial clients, sanitizes the data, and loads it into a data warehouse.

#Data Engineering #ETL #Batch Processing
Practice
Backend Engineer • System Design • medium

Design a URL shortening service like Bitly. Focus on the database schema and read/write scaling.

#Hashing #Database Scaling #Caching
Practice
Backend Engineer • System Design • medium

A client's e-commerce backend is experiencing database timeouts during peak holiday sales. How would you architect a caching layer to resolve this?

#Caching #Performance #Architecture
Practice
Backend Engineer • System Design • medium

Design a notification system that sends email, SMS, and push notifications to users based on audit event triggers.

#Asynchronous Processing #Microservices #Third-party APIs
Practice
Backend Engineer • Technical • medium

Explain the difference between monolithic and microservices architectures. When would you recommend a client migrate to microservices?

#Microservices #System Architecture #Scalability
Practice
Backend Engineer • Technical • medium

How does Spring Boot handle dependency injection, and why is it beneficial for enterprise applications?

#Java #Spring Boot #Design Patterns
Practice
Backend Engineer • Technical • hard

Explain how you would secure a RESTful API built for a financial services client.

#API Security #OAuth2 #JWT #HTTPS
Practice
Backend Engineer • Technical • medium

What are the ACID properties in a database, and how do they apply to distributed transactions?

#SQL #Transactions #Distributed Systems
Practice
Backend Engineer • Technical • hard

Describe the differences between optimistic and pessimistic locking in database concurrency control.

#Concurrency #Databases #Performance
Practice
Backend Engineer • Technical • medium

How do you implement pagination and filtering in a REST API returning large datasets?

#REST #Performance #API Design
Practice
Backend Engineer • Technical • medium

Explain the concept of a Dead Letter Queue (DLQ) in message brokers like Kafka or RabbitMQ.

#Asynchronous Processing #Kafka #RabbitMQ #Error Handling
Practice
Backend Engineer • Technical • medium

What is the N+1 query problem in ORMs like Hibernate or Entity Framework, and how do you resolve it?

#ORM #Performance #SQL
Practice
Backend Engineer • Technical • hard

How do you ensure idempotent operations in a distributed backend system?

#Distributed Systems #API Design #Idempotency
Practice
Backend Engineer • Technical • medium

Describe your experience with CI/CD pipelines. How would you automate the deployment of a Dockerized backend service?

#CI/CD #Docker #Automation
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.

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Unwritten Rules

Think Out Loud

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

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