Thoughtworks interview questions
Online test → Technical → Technical → HR·74% entry level
CS fundamentals
Showing 30 of 88 reported in this area
Implement the Snake and Ladder game
Design a database schema for a bank.
Derive the time complexity of Quick Sort.
Explain the internal working of a HashMap.
How will you balance a Binary Search Tree?
Explain how the Java Garbage Collector works.
Explain OOP concepts used in the implementation
Explain DBMS basics and write common SQL queries
Explain the internal working of HashMap in depth.
Draw a class diagram for a given problem scenario.
Explain basics of Computer Networking and Operating Systems
Explain SOLID design principles and how they apply to the code
How does Java provide synchronized access to shared resources?
Write nested and complex SQL queries on a given database schema
Normalize the given database tables to appropriate normal forms.
Answer conceptual questions related to cryptography fundamentals.
Design a database schema for a given application and normalize it
Explain core Java fundamentals and the Java Collections Framework.
Optimize the given codebase for better performance and readability
What is DNS lookup, what is a Load Balancer, and how does a server work?
Design the database schema and write SQL queries for a given requirement.
What are SOLID principles and how do they help in writing clean, modular code?
Explain Java's multithreading mechanism including shared resources and monitors.
Explain the difference between Segmentation and Paging, and what is a Page Fault.
How do you list running processes, get a process ID, and kill a process in Linux?
Why is returning a Map from an API endpoint considered a bad practice in many cases?
How would you construct a SQL query involving joins between multiple tables using JPA?
Explain commonly used design patterns and when you would use them in application development.
Given the schema of 4–5 database tables, write MySQL queries to retrieve required information.
How can a disk with concentric circular tracks and sectors be represented using data structures?
DSA
Showing 15 of 63 reported in this area
Check for duplicate elements in a binary tree.
Find the minimum sum subarray in a given array
How do you delete the nth node from a linked list?
Check whether a binary tree is a complete binary tree
Explain fundamental data structures and their use cases
How do you delete the second last node in a singly linked list?
Explain tree traversals and boundary traversal of a binary tree.
Search for an element in a sorted rotated array in O(log n) time.
Design a data structure that can return a peak element in O(1) time.
Given an encoded string like '3(ab)4(cd)', expand it to 'abababcdcdcdcd'.
Explain Merge Sort, write its code, and explain the approach of Quick Sort.
Given n numbers a1, a2, a3, ..., an, find the pair-wise XOR of the numbers.
Given a city graph, how would you find all non-vegetarian restaurants in Siliguri?
Given an array, reorder it so that elements are arranged in alternating peaks and valleys.
Write a program to find the different ways to get a given sum from the elements of an array.
System design
Showing 8 of 19 reported in this area
Design a movie recommendation application.
Design a file system for an operating system.
How is a friend's list maintained in Facebook?
Design a database schema for a system like Netflix.
Design and implement a card game using object-oriented principles
Design an iPod inventory management system to calculate minimum cost
Design a Tree data structure using object-oriented programming principles
Mars Rover Problem: Design a system to move a rover on a grid based on commands and directions
Behavioural
Showing 3 of 12 reported in this area
Describe a situation where you felt significant pressure at work and explain how you handled it.
How would you handle a leadership situation where you need to make a decision in a complex or ambiguous scenario?
What are your views on equality versus equity, and how do you see the impact of the caste reservation system in India?
Aptitude
Showing 2 of 3 reported in this area
Find the next term or missing term in a given number series.
Solve logical reasoning questions based on flowcharts to determine correct outputs
Puzzles
Showing 2 of 3 reported in this area
Solve the 25 horses puzzle to find the fastest horses with minimum races.
Solve simple mathematical riddles based on basic logic.
Showing 60 of 161 questions. Ranked by how often the same question came back across reports.
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What questions does Thoughtworks ask?
Candidate interview reports most often cover CS fundamentals (47%) and DSA (34%).
How many rounds does Thoughtworks interview have?
Candidate interview reports show an average of 4.1 rounds per experience, with a typical sequence of Online test → Technical → Technical → HR. Individual interview paths can vary.
Is the Thoughtworks interview hard?
Among questions with a reported difficulty, the mix is easy 38%, medium 57%, hard 5%.