KPMG

KPMG

Multinational professional services network, and one of the Big Four accounting organizations.

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 • Coding • hard

Implement a rate limiter algorithm (e.g., Token Bucket) in code.

#System Design #Concurrency #Algorithms
Practice
Backend Engineer • Coding • medium

Write an algorithm to merge overlapping intervals. (Useful for scheduling audit tasks).

#Arrays #Sorting
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 Tables
Practice
Backend Engineer • Coding • easy

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

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

Write a function to group anagrams together from an array of strings.

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

Find the Kth largest element in an unsorted array.

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

Given a binary tree, write a function to serialize and deserialize it.

#Trees #BFS #DFS #Design
Practice
Backend Engineer • Coding • medium

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

#Data Structures #Hash Tables #Linked Lists
Practice
Backend Engineer • Coding • easy

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

#Stacks #Strings
Practice
Cloud Engineer • Coding • easy

Given a JSON payload representing cloud billing data, write a Python function to aggregate the total cost per service.

#Python #Data Manipulation #JSON
Practice
Cloud Engineer • Coding • hard

Write a Python function to check if a given CIDR block overlaps with a list of existing CIDR blocks in a VPC.

#Python #Networking #IP Addressing
Practice
Data Engineer • Coding • medium

Write a Python algorithm to find the longest consecutive sequence of days a user logged into a client portal.

#Python #Arrays #Logic
Practice
Data Scientist • Coding • easy

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

#Stacks #String Parsing
Practice
Data Scientist • Coding • easy

Given an array of integers, write a Python function to return the indices of the two numbers that add up to a specific target.

#Arrays #Hash Maps #Optimization
Practice
Data Scientist • Coding • medium

Write a Python function to merge overlapping time intervals. This is often used when analyzing user session logs.

#Arrays #Sorting #Intervals
Practice
Data Scientist • Coding • medium

Write a Python function to group a list of strings into anagrams.

#Strings #Hash Maps
Practice
Frontend Engineer • Coding • medium

Write a function to deep clone a JavaScript object without using `JSON.parse(JSON.stringify())` or external libraries like Lodash.

#JavaScript #Recursion #Memory
Practice
Frontend Engineer • Coding • easy

Given a string, find and return the first non-repeating character. If it doesn't exist, return null. Optimize for time complexity.

#Hash Maps #Strings #Optimization
Practice
Frontend Engineer • Coding • easy

Write a function to validate a password string. It must be at least 8 characters, contain one uppercase, one lowercase, one number, and one special character, without using a single massive Regex.

#String Manipulation #Validation #Logic
Practice
Frontend Engineer • Coding • medium

Write a function to flatten a deeply nested JSON object containing tax hierarchy data into a single-level object with dot-separated keys.

#JavaScript #Recursion #Data Transformation
Practice
Frontend Engineer • Coding • easy

Implement a debounce function from scratch and explain how you would use it to optimize a client search input field.

#JavaScript #Closures #Performance
Practice
Frontend Engineer • Coding • medium

Implement an LRU (Least Recently Used) Cache class in JavaScript with `get` and `put` methods operating in O(1) time complexity.

#Data Structures #JavaScript #Caching
Practice
Full Stack Engineer • Coding • medium

Find the length of the longest substring without repeating characters in a given data stream string.

#Strings #Sliding Window #Hash Tables
Practice
Full Stack Engineer • Coding • easy

Given an array of transaction amounts and a target reconciliation value, return the indices of the two amounts that add up to the target.

#Arrays #Hash Tables #Two Pointers
Practice
Full Stack Engineer • Coding • easy

Write a function to validate if a given string representing a mathematical tax formula has balanced and properly nested parentheses, brackets, and braces.

#Strings #Stacks
Practice
Full Stack Engineer • Coding • medium

Given a list of audit engagement timeframes represented as intervals [start_date, end_date], merge all overlapping engagements.

#Arrays #Sorting
Practice
Full Stack Engineer • Coding • medium

Given an array of strings representing vendor names, group the anagrams together to help identify duplicate vendor entries.

#Strings #Hash Tables #Sorting
Practice
Full Stack Engineer • Coding • medium

Find the Kth largest transaction amount in an unsorted array of daily transactions.

#Heaps #Quickselect #Arrays
Practice
Full Stack Engineer • Coding • easy

Write a function to reverse a singly linked list. This is often used as a sub-problem in our data pipeline transformations.

#Linked Lists #Pointers
Practice
Machine Learning Engineer • Coding • hard

Write an algorithm to detect a cycle in a directed graph. This is often used in anti-money laundering (AML) to detect circular financial transactions.

#Graphs #DFS #Cycle Detection
Practice
Machine Learning Engineer • Coding • medium

Implement a Python function to compute the cosine similarity between two sparse vectors represented as dictionaries.

#Math #Data Structures #Sparse Matrices
Practice
Machine Learning Engineer • Coding • easy

Write a Python function to calculate the 7-day moving average of a time series array representing daily transaction volumes.

#Arrays #Sliding Window #Python
Practice
Software Engineer • Coding • easy

Given the head of a singly linked list, reverse the list, and return the reversed list.

#Linked Lists #Pointers
Practice
Software Engineer • 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.

#Arrays #Sorting
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. You may assume that each input would have exactly one solution.

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

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

#Strings #Stack
Practice
Software Engineer • Coding • medium

Given an integer array nums and an integer k, return the k most frequent elements. You may return the answer in any order.

#Heaps #Hash Table #Sorting
Practice
Software Engineer • Coding • medium

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

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

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

#Design #Hash Table #Doubly Linked List
Practice
Software Engineer • Coding • easy

Given a string s, 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

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

#Strings #Hash Table
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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