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ThoughtWorks Data Scientist Interview Questions and Answers

Updated 11 Oct 2024

ThoughtWorks Data Scientist Interview Experiences

1 interview found

Data Scientist Interview Questions & Answers

user image Astha Agarwal

posted on 11 Oct 2024

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed before Oct 2023. There were 3 interview rounds.

Round 1 - Coding Test 

The first was a mcq based coding round for campus placement

Round 2 - Coding Test 

This was a pairing coding round

Round 3 - Technical 

(1 Question)

  • Q1. Explain different unsupervised algo
  • Ans. 

    Unsupervised algorithms are used to find patterns in data without labeled outcomes.

    • K-means clustering: partitions data into K clusters based on similarity

    • Hierarchical clustering: creates a tree of clusters based on similarity

    • Principal Component Analysis (PCA): reduces dimensionality by finding orthogonal components

    • Association rule mining: discovers interesting relationships between variables in large datasets

  • Answered by AI

Skills evaluated in this interview

Interview questions from similar companies

Data Scientist Interview Questions & Answers

LTIMindtree user image Abhishek Srivastav

posted on 16 Mar 2015

Interview Questionnaire 

3 Questions

  • Q1. Code For parse Traingle
  • Ans. 

    Code for parsing a triangle

    • Use a loop to iterate through each line of the triangle

    • Split each line into an array of numbers

    • Store the parsed numbers in a 2D array or a list of lists

  • Answered by AI
  • Q2. Asci value along with alphabets(both capital and small)
  • Ans. 

    The ASCII value is a numerical representation of a character. It includes both capital and small alphabets.

    • ASCII values range from 65 to 90 for capital letters A to Z.

    • ASCII values range from 97 to 122 for small letters a to z.

    • For example, the ASCII value of 'A' is 65 and the ASCII value of 'a' is 97.

  • Answered by AI
  • Q3. Would you like to go for Hire studies

Interview Preparation Tips

Round: Test
Experience: First round was through Elitmus.
If you want to be in IT industry must appear it atleast once, for core also u can try it.
It's usually a tough exam but if u are good in maths , apti you will crack it.
Tips: Focus more on Reasoning part. this is the most difficult part.
practise paragraphs reading and solving(Average level)(Infosys level or less)
If you need any kind of help you can contact me via email or can even ring me.
I would recomend everybody to appear this exam with minimum of one month dedicated preparation
Duration: 120 minutes
Total Questions: 60

Round: Coding Round on their own plateform
Experience: It was little difficult to write codes on some other plateform. But time was enough to cope up.
Tips: Try writing as many programs you can write in C, C++ and JAVA not on paper, on compiler . while giving this exam you can select any of these three languages. Based on that your technical Interview will be taken.

Round: Technical Interview
Experience: Its easy one if you have hands on on programing
Tips: Explore and explore .

Round: HR Interview
Experience: Most difficult round for me(I feel myself a little weak in English). But stay calm. And be cheerful.
I still don't know the exact answer of the question but conversation gone for about 20 minutes on this topic.
He din't seem satisfied with me. Btw most of the people says to say no. You can take your call according to the situation.
Tips: Stay calm. Have as much Knowledge about the organisation. Try to make your Intro as much interesting as possible with achivements, hobbies etc. Ya English plays most important role here.

General Tips: Always have faith in yourself. And remember Everything happens for some good reason
Skill Tips: Dont go deep in OS, DBMS but have rough idea about all the topics
Skills: C, C++, DATA STRUCTURE, DBMS, OS
College Name: GANDHI INSTITUTE OF ENGINEERING AND TECHNOLOGY
Motivation: I wanted a job. :)
Funny Moments: A number of stories are there related to this job.
One is I already had an offer so I booked my ticket to home from Bangalore But at very last moment my father told me that you should never miss any chance, go for it. I went and interview date was postponded due to some reasons. I got a mail at 10:30 pm saying I have to attend interview next day morning at 8:30 pm. I ran to get printout of that mail. The venue was 3 hour journey from my place so I din't sleep for the whole night because i knew that if I ll sleep, I would not be able to wake up But I din't studied also because it would have lead to sleep. And Without having sleep and last moment study I made it.

Skills evaluated in this interview

Interview Questionnaire 

1 Question

  • Q1. First Round: Basic Statistics, Basic Python Programming, Past Projects. Second Round: Past Projects, Questions from computer vision, NLP, SQL, Basic Python.
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Recruitment Consulltant and was interviewed in May 2023. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all Resume tips
Round 2 - Technical 

(3 Questions)

  • Q1. Questions on Python datatypes, class, object, inheritance,
  • Q2. Machine learning algorithms
  • Ans. 

    Machine learning algorithms are used to train models on data to make predictions or decisions.

    • Supervised learning algorithms include linear regression, decision trees, and neural networks.

    • Unsupervised learning algorithms include clustering and dimensionality reduction.

    • Reinforcement learning algorithms involve learning through trial and error.

    • Examples of machine learning applications include image recognition, natural l

  • Answered by AI
  • Q3. Sql queries and python coding questions
Round 3 - One-on-one 

(1 Question)

  • Q1. Related to project

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Naukri.com and was interviewed in Nov 2023. There were 2 interview rounds.

Round 1 - Coding Test 

SQL, select statment and DDL commands

Round 2 - Technical 

(1 Question)

  • Q1. Python lists and conditional statements and loos
Interview experience
5
Excellent
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Recruitment Consulltant and was interviewed before Oct 2022. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all Resume tips
Round 2 - Technical 

(1 Question)

  • Q1. Questions around resume
  • Ans. Explained word done by me and my responsibilities
  • Answered by Nikhil Pawar
Round 3 - One-on-one 

(1 Question)

  • Q1. Questions around python programming and my experience in data science
  • Ans. Explained end to end implementation of some of the projects I worked on
  • Answered by Nikhil Pawar

Interview Preparation Tips

Interview preparation tips for other job seekers - Study your resume and be ready to answer questions around that
Interview experience
2
Poor
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. Machine learning related questions and the theory of its operation

I applied via Recruitment Consultant and was interviewed in Mar 2021. There was 1 interview round.

Interview Questionnaire 

1 Question

  • Q1. Explain about your projects

Interview Preparation Tips

Interview preparation tips for other job seekers - Interviewer was looking for Data science experience in infrastructure that is building a solution for remedy ticket
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Naukri.com and was interviewed before Jul 2023. There was 1 interview round.

Round 1 - Technical 

(3 Questions)

  • Q1. Difference between .py and .pyc
  • Ans. 

    The .py files contain Python code, while the .pyc files are compiled bytecode files generated by Python when a .py file is imported.

    • The .py files are human-readable text files containing Python code.

    • The .pyc files are compiled bytecode files created by Python to improve execution speed.

    • The .pyc files are automatically generated by Python when a .py file is imported.

    • The .pyc files are platform-independent and can be dis

  • Answered by AI
  • Q2. Why we use bias in neural networks? Why do we scale our data in neural networks?
  • Ans. 

    Bias in neural networks helps in capturing the underlying patterns in data. Scaling data helps in improving convergence and performance.

    • Bias in neural networks helps in shifting the activation function to better fit the data.

    • It allows the model to capture the underlying patterns in the data by providing flexibility in the decision boundary.

    • Scaling data helps in improving convergence by ensuring that the gradients are o...

  • Answered by AI
  • Q3. Explain RNN and LSTM
  • Ans. 

    RNN is a type of neural network that processes sequential data. LSTM is a type of RNN that can learn long-term dependencies.

    • RNN stands for Recurrent Neural Network and is designed to handle sequential data by maintaining a hidden state that captures information about previous inputs.

    • LSTM stands for Long Short-Term Memory and is a type of RNN that addresses the vanishing gradient problem by introducing a memory cell, in...

  • Answered by AI

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I was interviewed before Feb 2024.

Round 1 - Case Study 

Case study was given to test coding and ML skills

Round 2 - One-on-one 

(2 Questions)

  • Q1. Based on Case Study
  • Q2. Based on Case Study
Round 3 - HR 

(2 Questions)

  • Q1. Overall interview feedback
  • Q2. Salary expectations
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ThoughtWorks Interview FAQs

How many rounds are there in ThoughtWorks Data Scientist interview?
ThoughtWorks interview process usually has 3 rounds. The most common rounds in the ThoughtWorks interview process are Coding Test and Technical.

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ThoughtWorks Data Scientist Interview Process

based on 1 interview

Interview experience

5
  
Excellent
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ThoughtWorks Data Scientist Salary
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₹9 L/yr - ₹23 L/yr
6% more than the average Data Scientist Salary in India
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