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Paytm Data Scientist Interview Questions and Answers
Paytm Data Scientist Interview Experiences
2 interviews found
Anonymous
I applied via LinkedIn and was interviewed in Dec 2023. There was 1 interview round.
(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
- Regression
- Machine Learning
deep shikha Shish
Selected
I applied via Referral and was interviewed before Jul 2023. There were 2 interview rounds.
2 hours, 12th level math questions
1 hour, sql and python
Interview questions from similar companies
Interview Preparation Tips
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
Pranjal Singh
Interview Preparation Tips
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
- 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...
- 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...
- Q4. 4. Do you prefer working in clear defined goal space or where customer isn't sure what he wants?
Interview Preparation Tips
Skills evaluated in this interview
(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
I applied via Referral and was interviewed in Nov 2024. There was 1 interview round.
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.
InfoOnly
I applied via Referral and was interviewed in May 2024. There was 1 interview round.
(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...
I applied via LinkedIn and was interviewed in Apr 2023. There were 3 interview rounds.
A Hackerank test with 2 SQL questions and 7 MCQ questions on Probablity,Naive Bayes,Excel 7 some Graph analysis questions
(1 Question)
- Q1. Didn't hear back after the test , later was rejected
(1 Question)
- Q1. SQL and background related questions
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Paytm Data Scientist Interview Process
based on 2 interviews
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