8 RenewBuy Senior Data Scientist Interview Questions & Answers | Complete Prep Guide 2025

RenewBuy Senior Data Scientist Interview Experiences

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Senior Data Scientist Interview Questions & Answers

Anonymous

posted on 22 Jan 2025

Interview experience

Average

Difficulty level

Moderate

Process Duration

Less than 2 weeks

Result

Not Selected

I was interviewed in Dec 2024.

Round 1 - Technical

(8 Questions)

Q1. Can you describe your current project or any past projects that are related to machine learning?

Ans.

Developed a machine learning model to predict customer churn for a telecom company.

Used supervised learning techniques such as logistic regression and random forests
Preprocessed data by handling missing values and encoding categorical variables
Evaluated model performance using metrics like accuracy, precision, and recall

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Q2. What is Linnear regression ?

Ans.

Linear regression is a statistical method used to model the relationship between a dependent variable and one or more independent variables.

Linear regression aims to find the best-fitting straight line that describes the relationship between variables.
It is commonly used for prediction and forecasting in various fields such as finance, economics, and social sciences.
The equation for linear regression is typically repre...

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Q3. Diff betn linnear and logistic regression?

Ans.

Linear regression is used for continuous variables while logistic regression is used for binary classification.

Linear regression predicts continuous values while logistic regression predicts probabilities.
Linear regression uses a linear equation to model the relationship between the independent and dependent variables.
Logistic regression uses the logistic function to model the probability of a binary outcome.
Linear reg...

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Q4. Diff betn random forest vs decision tree algorithm?

Ans.

Random forest is an ensemble learning method that uses multiple decision trees to make predictions.

Random forest is a collection of decision trees that are trained on different subsets of the data.
Decision tree is a single tree-like structure that makes decisions based on features of the data.
Random forest reduces overfitting by averaging the predictions of multiple trees.
Decision tree can be prone to overfitting if no...

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Q5. Formula for precision?

Ans.

Precision is the ratio of correctly predicted positive observations to the total predicted positive observations.

Precision = True Positives / (True Positives + False Positives)
It is a measure of the accuracy of the positive predictions made by the model.
A high precision indicates that the model is good at predicting positive cases without many false positives.

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Q6. Common metrics to find accuracy of linnear regression model and Logistic regression model?

Ans.

Common metrics for linear and logistic regression models are R-squared and confusion matrix respectively.

For linear regression model, common metric is R-squared which measures the proportion of the variance in the dependent variable that is predictable from the independent variables.
For logistic regression model, common metric is confusion matrix which includes metrics like accuracy, precision, recall, and F1 score to ...

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Q7. What is recall and F1?

Ans.

Recall is the ratio of correctly predicted positive observations to the all observations in actual class. F1 is the harmonic mean of precision and recall.

Recall is calculated as TP / (TP + FN)
F1 score is calculated as 2 * (precision * recall) / (precision + recall)
Recall is important in scenarios where false negatives are costly, like in medical diagnosis

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Q8. Tell me example of ensemble technique?

Ans.

Ensemble technique combines multiple models to improve prediction accuracy.

Ensemble methods include bagging, boosting, and stacking
Random Forest is an example of ensemble technique using bagging
Gradient Boosting Machine (GBM) is an example of ensemble technique using boosting

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ACKO

Anonymous

posted on 2 Oct 2023

Interview experience

Good

Difficulty level

Process Duration

Result

Round 1 - Coding Test

Easy Medium questions

Round 2 - Design Test

(1 Question)

Q1. Asked to design Basic Facebook.

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Senior Associate Interview Questions & Answers

ACKO

Bijay Kumar Maharana

posted on 17 Dec 2024

Interview experience

Excellent

Difficulty level

Process Duration

Result

Round 1 - One-on-one

(2 Questions)

Q1. Why do you want to work with ACKO?

Ans.

I want to work with ACKO because of their innovative approach to insurance and their strong focus on customer satisfaction.

Innovative approach to insurance - ACKO's use of technology to simplify the insurance process is impressive.
Strong focus on customer satisfaction - ACKO's commitment to providing excellent customer service sets them apart from other insurance companies.
Opportunity for growth and learning - I believ...

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Q2. What is insurance?

Ans.

Insurance is a financial product that provides protection against financial losses resulting from unexpected events.

Insurance involves a contract between an individual or entity (the policyholder) and an insurance company.
The policyholder pays a premium in exchange for coverage and protection against specified risks.
Types of insurance include health, life, auto, home, and business insurance.
Insurance helps individuals ...

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Senior Associate Interview Questions & Answers

Digit Insurance

Anonymous

posted on 24 Jul 2021

I applied via Company Website and was interviewed in Jan 2021. There were 4 interview rounds.

Interview Questionnaire

2 Questions

Q1. About General Insurannce bancasurance experience

Add your answer

Q2. Let it be very clear when you are speaking about general Insurance and also about your chanel sales developement.

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Interview Preparation Tips

Interview preparation tips for other job seekers - be cool and very genuine when you are anwering.

Senior Associate Interview Questions & Answers

HDFC Ergo General Insurance

Harshal Patil

posted on 30 Aug 2024

Interview experience

Excellent

Difficulty level

Moderate

Process Duration

Less than 2 weeks

Result

Selected

I applied via Referral and was interviewed in Jul 2024. There were 3 interview rounds.

Round 1 - HR