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Paytm Data Scientist Interview Questions and Answers

Updated 1 Jul 2024

Paytm Data Scientist Interview Experiences

2 interviews found

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

I applied via LinkedIn and was interviewed in Dec 2023. There was 1 interview round.

Round 1 - One-on-one 

(2 Questions)

  • Q1. Discussion on linear regression and regularisation techniques
  • Q2. Discussion on tree based models and measures to score the models

Interview Preparation Tips

Topics to prepare for Paytm Data Scientist interview:
  • Regression
  • Machine Learning
Interview preparation tips for other job seekers - Prepare core definitions and theory for data science properly including maths and equations in details.

Data Scientist Interview Questions & Answers

user image deep shikha Shish

posted on 1 Jul 2024

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

I applied via Referral and was interviewed before Jul 2023. There were 2 interview rounds.

Round 1 - Aptitude Test 

2 hours, 12th level math questions

Round 2 - Coding Test 

1 hour, sql and python

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Interview Preparation Tips

Round: Technical Interview
Experience: The technical interview included a VP round which was more of a resume round. I concentrated my interview (VP round) on Machine learning which my field is. This was kind of a trick because many people screwed up this round. Hence, VP offered to me to work in VISA HQ.

Round: Technical Interview
Experience: This technical round included questions from almost all topics of CS (SQL query, coding, Networks, Security, Hadoop and Map-Reduce).

General Tips: Do’s :
1) Start right from August
2) Prepare basics of subjects
3) Try to code using pen and paper
4) Code as many problems as you can from all domains with only 1 language (C/C++/Java)
5) Keep a friend with you at all times during interviews. If you are selected for more than 1
companies in 1 slot, ask your friend to manage your interview schedules given he knows your
priorities. I was not in a position to attend more than 2 interviews in the same slot.

Don’ts :
1) Don’t lose hope if you are not shortlisted for your dream company or any company of your choice because being an IITian you have large number of better choices and which would fit in your profile better.
2) Don’t argue with the interviewers and never pretend that you are over smart in a given domain.
3) Do not take HR rounds lightly even if you are sitting for CS companies.

Final Tips :
Start your preparation early. Placement is 90% preparation and 10% luck.
College Name: IIT Kanpur

Data Scientist Interview Questions & Answers

Visa user image Pranjal Singh

posted on 14 Jan 2015

Interview Preparation Tips

Round: Test
Duration: 120 minutes
Total Questions: 42

Round: Test
Experience: There was a test for VISA which had following sections:
Assessment Composition:
1. Coding Skills: 2 Questions - Very simple problems - 30 marks total
2. Programming: 10 Questions - Simple Java Questions --Access modifiers, inline function, Red black tree, heap
3. Machine Learning Hadoop MCQ: 6 Questions You can't answer a single question if ML/BigData is remote-land for you.
4. Networking MCQ: 6 Questions - Again basics. Data layer questions. IP class basic question, fields in ethernet header.
5. Operating System: 6 Questions - Memory management mostly
6. Infrastructure: 6 Questions - Real life scenarios - server client questions.
7. Application Security: 6 Questions
Duration: 120 minutes
Total Questions: 42

Round: Interview
Experience: Questions from all CS subjects including coding
Tips: They shortlisted 29 students for the final interviews on Day 1 Slot 1.
There were 2 rounds of technical interview and 1 interview.

General Tips: Do’s
1)      Start right from August 
2)      Prepare basics of subjects
3)      Try to code using pen and paper
4)      Code as many problems as you can from all domains with only 1 language (C/C++/Java)
5)      Keep a friend with you at all times during interviews. If you are selected for more than 1 companies in 1 slot, ask your friend to manage your interview schedules given he knows your priorities. I was not in a position to attend more than 2 interviews in the same slot.
Don’ts
1)      Don’t lose hope if you are not shortlisted for your dream company or any company of your choice because being an IITian you have large number of better choices and which would fit in your profile better.
2)      Don’t argue with the interviewers and never pretend that your are over smart in a given domain.
3)      Do not take HR rounds lightly even if you are sitting for CS companies.
Skills: C++
College Name: IIT Kanpur
Motivation: Role of my interest

I applied via Campus Placement and was interviewed before Feb 2019. There were 3 interview rounds.

Interview Questionnaire 

4 Questions

  • Q1. 1. How to choose optimum probability threshold from ROC?
  • Ans. 

    To choose optimum probability threshold from ROC, we need to balance between sensitivity and specificity.

    • Choose the threshold that maximizes the sum of sensitivity and specificity

    • Use Youden's J statistic to find the optimal threshold

    • Consider the cost of false positives and false negatives

    • Use cross-validation to evaluate the performance of different thresholds

  • Answered by AI
  • Q2. 2. How to test time series trend break up?
  • Ans. 

    To test time series trend break up, statistical tests like Augmented Dickey-Fuller test can be used.

    • Augmented Dickey-Fuller test can be used to check if a time series is stationary or not.

    • If the time series is not stationary, we can use differencing to make it stationary.

    • After differencing, we can again perform the Augmented Dickey-Fuller test to check for stationarity.

    • If there is a significant change in the mean or va...

  • Answered by AI
  • Q3. 3. How do you deal with senior customer when you don't have enough data?
  • Ans. 

    Communicate transparently and offer alternative solutions.

    • Explain the limitations of the available data and the potential risks of making decisions based on incomplete information.

    • Offer alternative solutions that can be implemented with the available data.

    • Collaborate with the customer to identify additional data sources or explore other options to gather more data.

    • Provide regular updates on the progress of data collect...

  • Answered by AI
  • Q4. 4. Do you prefer working in clear defined goal space or where customer isn't sure what he wants?

Interview Preparation Tips

Interview preparation tips for other job seekers - Be business specific.

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - HR 

(2 Questions)

  • Q1. When is your Availability
  • Q2. Expectation from us
  • Ans. 

    I expect a supportive work environment, opportunities for growth, and clear communication.

    • Clear communication on project goals and expectations

    • Opportunities for professional development and growth

    • Supportive team environment

    • Regular feedback and performance evaluations

  • Answered by AI
Interview experience
2
Poor
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
No response

I applied via Referral and was interviewed in Nov 2024. There was 1 interview round.

Round 1 - Case Study 

Cancellation in the number of bookings in an app has increased exponentially in the past few weeks, How would you conduct an RCA on the same.

Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
2-4 weeks
Result
Not Selected

I applied via Referral and was interviewed in May 2024. There was 1 interview round.

Round 1 - HR 

(2 Questions)

  • Q1. Why are you interested in this role
  • Q2. Provide an example how you solved a problem
  • Ans. 

    I solved a problem by using machine learning algorithms to predict customer churn for a telecom company.

    • Identified relevant data sources such as customer demographics, usage patterns, and customer service interactions.

    • Preprocessed and cleaned the data to handle missing values and outliers.

    • Built and trained a machine learning model using algorithms like logistic regression and random forest.

    • Evaluated the model's perform...

  • Answered by AI
Interview experience
3
Average
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
No response

I applied via LinkedIn and was interviewed in Apr 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 tips
Round 2 - Coding Test 

A Hackerank test with 2 SQL questions and 7 MCQ questions on Probablity,Naive Bayes,Excel 7 some Graph analysis questions

Round 3 - One-on-one 

(1 Question)

  • Q1. Didn't hear back after the test , later was rejected
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. SQL and background related questions

Paytm Interview FAQs

How many rounds are there in Paytm Data Scientist interview?
Paytm interview process usually has 1-2 rounds. The most common rounds in the Paytm interview process are One-on-one Round, Aptitude Test and Coding Test.
How to prepare for Paytm Data Scientist interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Paytm. The most common topics and skills that interviewers at Paytm expect are Machine Learning, Python, Data Science, SQL and Financial Services.
What are the top questions asked in Paytm Data Scientist interview?

Some of the top questions asked at the Paytm Data Scientist interview -

  1. Discussion on tree based models and measures to score the mod...read more
  2. Discussion on linear regression and regularisation techniq...read more

Tell us how to improve this page.

Paytm Data Scientist Interview Process

based on 2 interviews

Interview experience

3.5
  
Good
View more

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Paytm Data Scientist Salary
based on 63 salaries
₹7 L/yr - ₹26 L/yr
9% more than the average Data Scientist Salary in India
View more details

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based on 11 reviews

3.8/5

Rating in categories

3.8

Skill development

3.9

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3.7

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Job security

3.5

Company culture

3.5

Promotions

3.6

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