1 ThoughtWorks Data Scientist Interview Questions & Answers | Complete Prep Guide 2025

ThoughtWorks Data Scientist Interview Experiences

1 interview found

Data Scientist Interview Questions & Answers

Astha Agarwal

posted on 11 Oct 2024

Interview experience

Excellent

Difficulty level

Moderate

Process Duration

Less than 2 weeks

Result

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

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Data Scientist Interview Questions & Answers

LTIMindtree

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

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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.

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Q3. Would you like to go for Hire studies

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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

Data Scientist Interview Questions & Answers

Wipro

Anonymous

posted on 31 Jul 2021

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.

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Data Scientist Interview Questions & Answers

Synechron

Anonymous

posted on 31 May 2023

Interview experience

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.

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Round 2 - Technical

(3 Questions)

Q1. Questions on Python datatypes, class, object, inheritance,

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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

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Q3. Sql queries and python coding questions

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Round 3 - One-on-one