ThoughtWorks Application Developer Interview Questions, Process, and Tips

Q1. The duration of the test is around 2 hours. It has questions from DSA on topics like Graphs, Arrays, etc. and MCQs from other topics of OOPS and DBMS. Swapping adjacent, counting votes and Pair Sum.
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Q1. Problem statement: Aapali Taxi is a taxi cab operator. They have 3 types of cars- Mini, Sedan and SUV, each with different tariffs. When customers approach them for booking rides, they show an “Estimated ...read more
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Q1. 1. Permutations of the string.
Ans. 
Permutations of a string can be generated using recursion and swapping characters.
• Use recursion to generate all possible permutations

• Swap characters to create new permutations

• Store permutations in an array of strings

• Handle duplicate characters to avoid repetition
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Q2. 2. How will you design a database to manage the songs playlist on Spotify?
Ans. 
A database for managing songs on Spotify playlists.
• Create a table for playlists with columns for name, description, and user ID

• Create a table for songs with columns for title, artist, album, and duration

• Create a table for playlist-songs with columns for playlist ID and song ID

• Use foreign keys to link tables together

• Allow for CRUD operations on playlists and songs
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Q3. 3. Middle element of linked list in a single traversal
Ans. 
To find the middle element of a linked list in a single traversal.
• Use two pointers, one moving at twice the speed of the other.

• When the faster pointer reaches the end, the slower pointer will be at the middle.

• If the linked list has even number of elements, the middle will be the second of the two middle elements.
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Q4. 4. Design a list to show songs in the year in which they were published.
Ans. 
Create an array of song titles sorted by year of publication.
• Create an array of song objects with properties for title and year of publication.

• Sort the array by year of publication.

• Extract the titles of the songs into a separate array.

• Return the array of song titles.
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Q5. 5. Another question related to library management class where you have to make diagrams too.
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Q1. This Round is comparatively simple and easier than previous rounds. They ask you to introduce yourself followed by questions regarding your background goals, strengths, etc. And discussing some social prob...read more
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Code pairing round. There will be two interviews. You will be given a code base few days before. We have to implement the new features said by them in the call itslef.

Q1. How does HTTP work?
Ans. 
HTTP is a protocol used for transferring data over the internet.
• HTTP stands for Hypertext Transfer Protocol.

• It is the foundation of data communication on the World Wide Web.

• HTTP works by establishing a connection between a client and a server, where the client sends a request and the server responds with the requested data.

• HTTP uses methods like GET, POST, PUT, DELETE to specify the action to be performed on a resource...read more
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Q2. Explain the college projects which you have worked on
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Q1. OOP based questions - Inheritance, Polymorphism etc
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Q2. Project based in depth question - which technology, why
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Q3. Data structures concept, programming concepts (i was asked loop vs recurssion)
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The duration of this round will be 2hours. You will get the code base details over email in advance and you have to make your self familiar with code base. During interview you will asked to choose the one problem statement among few and need to implement on top of the code base. this will be like enchantment of the existing code base. Interviewer will focus on approach you going to take. Object oriented design. clean code. and you thought process about the solution.

Q1. There will be two interviewer. The technical round will be divided into two parts technical depth and technical breadth. Each round will be 2hours. In first round you the interviewer will focus on data str...read more
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Q1. This will be a personality check and salary discussion
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Q1. What are your salary expectations?
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Q2. Why are you looking for a change?
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Q3. Tell me about yourself.
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Q4. Why did you choose Thoughtworks?
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Q1. Code Pairing Round on a github repo
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Q2. Add a new feature using SOLID principles and explain your thought process
Ans. 
Adding a new feature using SOLID principles
• Identify the new feature and its requirements

• Analyze the existing codebase and identify areas that need modification

• Apply SOLID principles to design the new feature

• Implement the feature using clean code practices

• Test the feature thoroughly to ensure it meets the requirements
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Q3. Explain the HTTP status code for your tests
Ans. 
HTTP status codes indicate the status of a web request.
• 1xx - Informational

• 2xx - Success

• 3xx - Redirection

• 4xx - Client Error

• 5xx - Server Error

• Examples: 200 OK, 404 Not Found, 500 Internal Server Error
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Q1. Explain your previous project
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Q2. What could you have done differently
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Q1. Why are you looking for a change?
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Q2. What are your strengths and weaknesses?
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Q3. Tell me about yourself.
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Q4. Social change questions
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Q1. A question on Pizza bill calculation. Use oops concept and try to print the correct output. Practice more questions like bill calculation using oops.
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Q1. What is better java or c?
Ans. 
Both Java and C have their own strengths and weaknesses, and the choice depends on the specific requirements of the project.
• Java is better for developing enterprise-level applications due to its platform independence and robustness.

• C is better for developing system-level software and applications that require high performance and low-level access to hardware.

• Java has a larger community and more libraries and frameworks...read more
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Q1. What challenges have you faced
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