Accenture

Global professional services company with leading capabilities in digital, cloud and security.

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

All Roles Backend Engineer 7 Data Engineer 1 Data Scientist 5 DevOps Engineer 1 Frontend Engineer 4 Machine Learning Engineer 4 Software Engineer 9

All Topics System Design 44 Algorithms 31 SQL 15 Culture Fit 12 Machine Learning 9 Security 9 DevOps 9 Leadership 8

Backend Engineer • Coding • easy

Given an array of integers and a target value, return the indices of the two numbers that add up to the target. Assume exactly one solution exists.

#Arrays #Hash Maps

Backend Engineer • Coding • medium

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

#Strings #Sliding Window #Hash Maps

Backend Engineer • Coding • medium

Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree.

#Trees #Recursion #DFS

Backend Engineer • 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.

#Heaps #Quickselect #Arrays

Backend Engineer • Coding • medium

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

#Strings #Hash Maps #Sorting

Backend 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

Backend Engineer • Coding • easy

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

#Strings #Stacks

Data Engineer • 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. (Two Sum)

#Python #Arrays #Hash Maps

Data Scientist • Coding • hard

Write a Python function to merge k sorted arrays. What is the time and space complexity of your solution?

#Heaps #Priority Queue #Sorting

Data Scientist • Coding • medium

Write a function to find the longest substring without repeating characters in a given string.

#Sliding Window #Strings #Hash Maps

Data Scientist • Coding • medium

Write a Python script to compute the TF-IDF matrix for a list of text documents without using external NLP libraries.

#NLP #Python #Math

Data Scientist • Coding • easy

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

#Hash Maps #Arrays #Optimization

Data Scientist • Coding • medium

Write a Python function to implement K-Means clustering from scratch. You can use NumPy but not scikit-learn.

#Python #Machine Learning Algorithms #NumPy

DevOps Engineer • Coding • easy

Write a function in Python to check if a given string is a valid IPv4 address.

#Python #String Manipulation #Networking

Frontend Engineer • Coding • medium

Write a function that transforms a flat list of items (each with an `id` and `parentId`) into a nested tree structure.

#Trees #Data Manipulation #Recursion

Frontend Engineer • Coding • easy

Write a function to deeply flatten an array of arbitrarily nested arrays without using the built-in `Array.prototype.flat()`.

#Recursion #Arrays #Data Manipulation

Frontend Engineer • Coding • medium

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

#Strings #Sliding Window #Hash Map

Frontend Engineer • Coding • easy

Write a function to check if two strings are valid anagrams of each other. Consider edge cases like spaces and capitalization.

#Strings #Hash Map #Sorting

Machine Learning Engineer • Coding • hard

Given a matrix representing a grid of delivery zones with associated costs, write an algorithm to find the minimum cost path from the top-left to the bottom-right zone, moving only right or down.

#Dynamic Programming #Matrix

Machine Learning Engineer • Coding • medium

Given a list of overlapping time intervals representing server downtime, merge all overlapping intervals and return an array of the merged downtimes.

#Arrays #Sorting

Machine Learning Engineer • Coding • medium

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

#Strings #Sliding Window

Machine Learning Engineer • Coding • easy

Given an array of client transaction amounts and a target sum, write a function to return the indices of the two transactions that add up exactly to the target.

#Arrays #Hash Map

Software Engineer • Coding • medium

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

#String #Array

Software Engineer • Coding • medium

Find the length of the longest substring without repeating characters.

#String #Sliding Window #Hash Set

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.

#Array #Hash Map

Software Engineer • Coding • easy

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

#Stack #String

Software Engineer • Coding • medium

Find the intersection node of two singly linked lists.

#Linked List #Two Pointers

Software Engineer • Coding • medium

Merge two sorted linked lists into a single sorted linked list.

#Linked List #Pointers

Software Engineer • Coding • medium

Write a function to find the first non-repeating character in a string and return its index.

#String #Hash Map

Software Engineer • Coding • easy

Find the second largest element in an array of integers in a single pass.

#Array #Optimization

Software Engineer • Coding • easy

Reverse a string without using any built-in reverse functions.

#String #Two Pointers

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.

Unwritten Rules

Think Out Loud

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