ThoughtWorks Interview Questions, Process, and Tips

4 coding question easy level questions based on arrays and strings

Code pairing round need to use oops to solve the problem

Q1. Two sum problem
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Q2. Internal working of hashmap
Ans. 
HashMap in Java is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.
• HashMap uses hashing to store and retrieve key-value pairs

• It uses an array of linked lists to handle collisions

• The key's hash code is used to determine the index in the array where the key-value pair is stored

• HashMap allows one null key and multiple null values

• Example: HashMap<String, Integer> map = new
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Q3. Sql queries on aggregate function
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Q1. Gender equality
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Q2. Situation based question
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Coding plus aptitude

Code pairing round with one question and an hour to solve

Q1. Oops, dsa, java
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Q2. Projesct related
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Q1. Cultural fit round was kinda HR but more topics involved
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A github repo was shared and had to code on top of it. No DSA

Q1. Project details and depth in tech
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Q1. System design and breadth in tech
Ans. 
System design in tech involves creating scalable and efficient solutions to complex problems.
• Understanding the requirements and constraints of the system

• Breaking down the system into smaller components

• Choosing the appropriate technologies and architecture

• Considering scalability, reliability, and performance

• Collaborating with stakeholders to ensure alignment
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Q1. Leadership qualities
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Q1. Cultural fitness check
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Q1. Salary discussion
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I was tasked with creating a Spring Boot microservice.

Data Structure, Heap, Linked List

Q1. Give a brief intro of project and your roles and responsibility there.
Ans. 
I worked on a project to develop a mobile application for tracking fitness goals and progress.
• Designed user interface for the app to be user-friendly and intuitive

• Developed backend functionality to store and retrieve user data

• Implemented features such as goal setting, progress tracking, and social sharing

• Collaborated with a team of developers and designers to ensure project success
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Q2. Design Library Management System.
Ans. 
A Library Management System to track books, users, and transactions.
• Create database tables for books, users, transactions

• Implement functions for adding, updating, and deleting books

• Allow users to check out and return books

• Generate reports on book availability and user activity
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Q1. Salary Discussion
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Q2. Behavioural round
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It was pair programming round where we need to attempt a couple of Spark Scenario along with the Interviewer. You will have a boiler plate code with some functionalities to be filled up. You will be assessed on writing clean and extensible code and test cases.

Q1. Questions will be based on the Project where they try to assess the depth of understading you have on your project, data quality checks, handling failure scenarios, reasoning behind choice of tech stack
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