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ThoughtWorks Software Developer Interview Questions and Answers
10 Interview questions
Implementing a new API in a shared repository while adhering to clean code and SOLID principles.
Understand existing code structure and conventions before adding new API.
Follow Single Responsibility Principle: each class should have one reason to change.
Use meaningful names for functions and variables to enhance readability.
Implement error handling to manage exceptions gracefully.
Write unit tests for the new API to...
CHAR is fixed length while VARCHAR2 is variable length in SQL.
CHAR stores fixed length strings, padding with spaces if necessary.
VARCHAR2 stores variable length strings, not padding with spaces.
CHAR is faster for fixed length data, VARCHAR2 is more flexible for varying length data.
There are three types of constructors in C++: default constructor, parameterized constructor, and copy constructor.
Default constructor: Constructor with no parameters.
Parameterized constructor: Constructor with parameters.
Copy constructor: Constructor that initializes an object using another object of the same class.
Example: // Default constructor ClassName() {} // Parameterized constructor ClassName(int x, int...
Left View of a Binary Tree
Given a binary tree, your task is to print the left view of the tree. The left view of a binary tree contains the nodes visible when the tree is viewed from the left side.
Input...
The task is to print the left view of a binary tree, which contains the nodes visible when the tree is viewed from the left side.
Traverse the tree in a level order manner and keep track of the leftmost node at each level.
Use a queue to perform level order traversal.
Print the leftmost node at each level to get the left view of the binary tree.
Maximum Sum Subarray Problem Statement
Given an array of integers, find the maximum sum of any contiguous subarray within the array.
Example:
Input:
array = [34, -50, 42, 14, -5, 86]
Output:
137
Expl...
Find the maximum sum of any contiguous subarray within an array in O(N) time complexity.
Use Kadane's algorithm to find the maximum sum subarray in O(N) time complexity
Initialize two variables: max_sum and current_sum to keep track of the maximum sum subarray
Iterate through the array and update current_sum by adding the current element or starting a new subarray
Update max_sum if current_sum is greater than max_sum
R...
Overloading is having multiple methods in the same class with the same name but different parameters, while overriding is implementing a method in a subclass that is already defined in the superclass.
Overloading involves multiple methods with the same name but different parameters.
Overriding involves implementing a method in a subclass that is already defined in the superclass.
Overloading is resolved at compile ti...
ThoughtWorks HR Interview Questions
Subtree Node Count Problem
We are provided with a tree containing 'N' nodes, numbered from 0 to N-1. The objective is to determine the total number of nodes within each subtree of the provided tree. Specif...
Given a tree with N nodes, find the number of elements in each subtree rooted at every node.
Traverse the tree using Depth First Search (DFS) to calculate subtree sizes for each node.
Use an array to store subtree sizes for each node, starting with leaf nodes having size 1.
The subtree size of a node is the sum of subtree sizes of its children plus 1 for the node itself.
Total Unique Paths Problem Statement
You are located at point ‘A’, the top-left corner of an M x N matrix, and your target is point ‘B’, the bottom-right corner of the same matrix. Your task is to calculat...
The problem involves finding the total number of unique paths from the top-left to bottom-right cell of a matrix by moving only right or down.
Use dynamic programming to solve the problem efficiently.
Create a 2D array to store the number of unique paths at each cell.
Initialize the first row and first column with 1 as there is only one way to reach them.
For each cell (i, j), the number of unique paths is the sum of ...
River Crossing: Help Ninja Cross Over
Ninja stands at the start of a wooden bridge over a river. Some segments of the bridge are damaged. The undamaged segments, marked as 'safe', are listed in an array SA...
Check if Ninja can cross the river by jumping from one safe segment to another based on given constraints.
Iterate through the 'SAFE' array and check if Ninja can make the required jumps to reach the last safe segment.
Ensure that the next jump is either 'X' - 1, 'X', or 'X' + 1 units from the previous jump.
Return 'true' if Ninja can successfully cross the river, otherwise return 'false'.
Middle of a Linked List
You are given the head node of a singly linked list. Your task is to return a pointer pointing to the middle of the linked list.
If there is an odd number of elements, return the m...
Return the middle element of a singly linked list, or the one farther from the head if there are even elements.
Traverse the linked list with two pointers, one moving twice as fast as the other
When the fast pointer reaches the end, the slow pointer will be at the middle
Return the element pointed to by the slow pointer
ThoughtWorks Software Developer Interview Experiences
8 interviews found
Anonymous
Selected
I appeared for an interview in Jan 2025.
Test will be in hacker rank there would be a difficulty level between easy to medium
(1 Question)
- Q1. Question will be from data structure and easy to medium level of the programming laanguage question
(1 Question)
- Q1. This is just to check your english ability
Hackerrank coding round.
(1 Question)
- Q1. Questions and coding testing your OOPS knowledge
(1 Question)
- Q1. Every tech stack, SQL, OOPS, JAVA
Interview Preparation Tips
Prashant dhote
Selected
I applied via Recruitment Consulltant and was interviewed in Jan 2024. There were 2 interview rounds.
(2 Questions)
- Q1. Code pairing round - you will be given story where you need to add one API to the share repository. It is a simple problem but needs good understanding of the shared code. You should follow clean code pri...
- Ans.
Implementing a new API in a shared repository while adhering to clean code and SOLID principles.
Understand existing code structure and conventions before adding new API.
Follow Single Responsibility Principle: each class should have one reason to change.
Use meaningful names for functions and variables to enhance readability.
Implement error handling to manage exceptions gracefully.
Write unit tests for the new API to ensu...
- Q2. Add one API to the existing repository
- Ans.
The API allows users to retrieve weather data based on location.
Create a new endpoint that accepts a location parameter
Use a weather API service to fetch weather data based on the location
Return the weather data in a standardized format, such as JSON
(2 Questions)
- Q1. Project you are working on, do some changes to the project, how well you understand the project
- Q2. Add some feature to the project
- Ans.
The feature added to the project is a user authentication system.
Implement a login page with username and password fields.
Create a database table to store user credentials.
Hash and salt passwords for secure storage.
Implement password reset functionality.
Add user roles and permissions for access control.
Skills evaluated in this interview
Code paring round was conducted. they will assist you what there expectations are
Selected
I appeared for an interview before Dec 2023.
Such a nice experience
Such a nice experience
(1 Question)
- Q1. Covered LinkedLists and Trees
(1 Question)
- Q1. Cultural Assessment Round
Interview Preparation Tips
I appeared for an interview in Mar 2022.
(1 Question)
Round duration - 60 minutes
Round difficulty - Medium
Mcq + Data structures questions
- Q1.
Maximum Sum Subarray Problem Statement
Given an array of integers, find the maximum sum of any contiguous subarray within the array.
Example:
Input:
array = [34, -50, 42, 14, -5, 86]
Output:
137
Exp...
- Ans.
Find the maximum sum of any contiguous subarray within an array in O(N) time complexity.
Use Kadane's algorithm to find the maximum sum subarray in O(N) time complexity
Initialize two variables: max_sum and current_sum to keep track of the maximum sum subarray
Iterate through the array and update current_sum by adding the current element or starting a new subarray
Update max_sum if current_sum is greater than max_sum
Return...
(1 Question)
Round duration - 70 minutes
Round difficulty - Medium
Standard System Design round
- Q1. Design a Doctor Appointment System and provide some test cases.
(4 Questions)
Round duration - 90 minutes
Round difficulty - Medium
Interview of DSA + OOPS + Databse(SQL query) + Operating System
- Q1.
Left View of a Binary Tree
Given a binary tree, your task is to print the left view of the tree. The left view of a binary tree contains the nodes visible when the tree is viewed from the left side.
Inpu...
- Ans.
The task is to print the left view of a binary tree, which contains the nodes visible when the tree is viewed from the left side.
Traverse the tree in a level order manner and keep track of the leftmost node at each level.
Use a queue to perform level order traversal.
Print the leftmost node at each level to get the left view of the binary tree.
- Q2. What is the difference between CHAR and VARCHAR2 data types in SQL?
- Ans.
CHAR is fixed length while VARCHAR2 is variable length in SQL.
CHAR stores fixed length strings, padding with spaces if necessary.
VARCHAR2 stores variable length strings, not padding with spaces.
CHAR is faster for fixed length data, VARCHAR2 is more flexible for varying length data.
- Q3. What are the various types of constructors in C++?
- Ans.
There are three types of constructors in C++: default constructor, parameterized constructor, and copy constructor.
Default constructor: Constructor with no parameters.
Parameterized constructor: Constructor with parameters.
Copy constructor: Constructor that initializes an object using another object of the same class.
Example: // Default constructor ClassName() {} // Parameterized constructor ClassName(int x, int y) :...
- Q4. What is the difference between overloading and overriding?
- Ans.
Overloading is having multiple methods in the same class with the same name but different parameters, while overriding is implementing a method in a subclass that is already defined in the superclass.
Overloading involves multiple methods with the same name but different parameters.
Overriding involves implementing a method in a subclass that is already defined in the superclass.
Overloading is resolved at compile time ba...
(1 Question)
Round duration - 60 minutes
Round difficulty - Easy
Hr round - normal hr questions + situational
Thoughtworks community discussion
- Q1. Why should we hire you?
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
I applied via Approached by Company and was interviewed before Mar 2021. There were 4 interview rounds.
DSA
About Social changes
(2 Questions)
- Q1. Tell me about yourself.
- Q2. Very basic questions
Interview Preparation Tips
- DSA
I appeared for an interview before Sep 2020.
(2 Questions)
Round duration - 90 minutes
Round difficulty - Medium
We were supposed to give test in any time between 3 PM to 9 PM.
- Q1.
Total Unique Paths Problem Statement
You are located at point ‘A’, the top-left corner of an M x N matrix, and your target is point ‘B’, the bottom-right corner of the same matrix. Your task is to calcula...
- Q2.
Subtree Node Count Problem
We are provided with a tree containing 'N' nodes, numbered from 0 to N-1. The objective is to determine the total number of nodes within each subtree of the provided tree. Speci...
- Ans.
Given a tree with N nodes, find the number of elements in each subtree rooted at every node.
Traverse the tree using Depth First Search (DFS) to calculate subtree sizes for each node.
Use an array to store subtree sizes for each node, starting with leaf nodes having size 1.
The subtree size of a node is the sum of subtree sizes of its children plus 1 for the node itself.
(1 Question)
Round duration - 120 minutes
Round difficulty - Medium
Pair Programming Interview( this round is similar to machine coding round) it started around 11 AM
Focus Areas: Problem solving and implementation of extensions.
The pair coding round is focused on OOPS concepts. You are paired with a TWer for this round. They let you code first for an hour and in the next hour they review your code and suggest changes which would improve the code structure, readability and make it modular and reusable and functional.
- Q1.
River Crossing: Help Ninja Cross Over
Ninja stands at the start of a wooden bridge over a river. Some segments of the bridge are damaged. The undamaged segments, marked as 'safe', are listed in an array
S... - Ans.
Check if Ninja can cross the river by jumping from one safe segment to another based on given constraints.
Iterate through the 'SAFE' array and check if Ninja can make the required jumps to reach the last safe segment.
Ensure that the next jump is either 'X' - 1, 'X', or 'X' + 1 units from the previous jump.
Return 'true' if Ninja can successfully cross the river, otherwise return 'false'.
(1 Question)
Round duration - 120 minutes
Round difficulty - Medium
Students who were shortlisted from Pair Programming round was selected for this round around 3 PM. In this round there were two interviewer.
- Q1.
Middle of a Linked List
You are given the head node of a singly linked list. Your task is to return a pointer pointing to the middle of the linked list.
If there is an odd number of elements, return the ...
Interview Preparation Tips
Tip 1 : Have good grasp on OOPS since they have a round named Pair Programming round which is focused upon this.
Tip 2 : Write clean, modular and functional code.
Tip 3 : Practice Data Structures and Algorithms
Tip 4 : You should know breadth and depth of whatever is mentioned in your resume.
Tip 5 : Be loud and clear.
Tip 1 : Make single page resume.
Tip 2 : Mention relevant things on resume.
Tip 3 : Do not put any false things on resume. Projects, internships you are mentioning be ready to answer questions related to it regarding what you solved, idea, databases, design.
Tip 4 : Contribute in open source, participate in hackathons.
Skills evaluated in this interview
Top trending discussions
Interview questions from similar companies
Shreeya
Interview Questionnaire
7 Questions
- Q1. Tell me about yourself?
- Q2. Do you know anything about DBMS? Where is it used?
- Ans.
DBMS stands for Database Management System. It is used to manage and organize data in a structured manner.
DBMS is used in various industries such as healthcare, finance, education, and more.
It helps in creating, modifying, and deleting data in a database.
DBMS provides security features to protect data from unauthorized access.
Examples of DBMS include MySQL, Oracle, Microsoft SQL Server, and PostgreSQL.
- Q3. Practical example of object
- Ans.
An object is a self-contained entity that contains data and behavior.
Objects are instances of classes
They have attributes (data) and methods (behavior)
Objects can interact with each other through method calls
Example: A car object has attributes like color, make, and model, and methods like start and stop
- Q4. Practical implementation of sorting
- Ans.
Sorting is the process of arranging data in a particular order.
Sorting can be done in ascending or descending order.
Common sorting algorithms include bubble sort, insertion sort, and quicksort.
Sorting can be done on various data types, including strings, numbers, and objects.
Sorting can be done using built-in functions in programming languages such as sort() in JavaScript.
Sorting can be optimized for performance by cho...
- Q5. Difference between C and C++
- Ans.
C is a procedural programming language while C++ is an object-oriented programming language.
C++ supports classes and objects while C does not.
C++ has better support for polymorphism and inheritance than C.
C++ has a larger standard library than C.
C++ allows function overloading while C does not.
C++ supports exception handling while C does not.
- Q6. Tell me about yourself
- Q7. Will your family allow you to move to Hyderabad
- Ans.
Yes, my family is supportive of my career and relocation decisions.
My family understands the importance of career growth and is supportive of my decisions.
We have discussed the possibility of relocation and they are willing to make the necessary adjustments.
They trust my judgment and believe that this move will be beneficial for my career.
We have also considered the quality of life in Hyderabad and believe that it will...
Interview Preparation Tips
Experience: Level was pretty high in case of Quant. You not only need a lot of practice but also practice of some really good questions.
Other than quant all the other sections are easy and direct.
Duration: 60 minutes
Total Questions: 45
Round: Group Discussion
Experience: They give 10 mins to think about the topic and 20 mins for discussion. Main purpose is to check your communication skills so keep on discussing . Even if you can't think of any new point repeat your points
Duration: 20 minutes
Round: Technical Interview
Experience: There were many other questions other than this but what they were emphasizing was whether you have done any practical implementation of IT or the coding skills. Tell them about your projects and how you implemented the coding part.They are much interested in logic than syntax.
Since I'm from ECE these were the main things I talked about.
Round: HR Interview
Experience: It was much of an interactive session.They again asked about projects-nothing technical only some basic idea. Lasted hardly 10 mins.
Round: Other Interview
Experience: In this round they mainly explained the salary structure. This one too was of 10 mins.
General Tips: Even if you don't have excellent coding knowledge do appear for the company. They are not looking for same qualities in each candidate. You should be willing enough to learn.
Skills: Aptitude, Communication Skills, Basic Technical Knowledge-mainly emphasized on the implementation part.
College Name: NIT Bhopal
Motivation: The company dates back to 1983 with locations in almost every US state. It is the 43rd company in Fortune 100 US companies. You have options to switch within the departments. Other than this the compensation is 6lpa.
Skills evaluated in this interview
Interview Questionnaire
1 Question
- Q1. Exam was conducted on programmes. 10 questions were asked
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Overall Interview Experience Rating
based on 7 interview experiences
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ThoughtWorks Software Developer Reviews and Ratings
based on 13 reviews
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