Vipro Lifescience Associate Data Analyst Interview Questions and Answers

Q1. What is overfitting in machine learning?
Ans. 
Overfitting occurs when a machine learning model learns the training data too well, including noise and outliers, leading to poor generalization on new data.
• Overfitting happens when a model is too complex and captures noise in the training data.

• It leads to poor performance on unseen data as the model fails to generalize well.

• Techniques to prevent overfitting include cross-validation, regularization, and early stopping.

• ...read more
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Q2. Overfitting accurs when a model learns the details.......etc
Ans. 
Overfitting occurs when a model learns the details and noise in the training data to the extent that it negatively impacts the model's performance on new data.
• Overfitting happens when a model is too complex and captures noise in the training data.

• It leads to poor generalization and high accuracy on training data but low accuracy on new data.

• Techniques to prevent overfitting include cross-validation, regularization, and...read more
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Data Coding, 1hr, series of questions in excel

Quantitative aptitude, reasoning with time limit

Excel tasks were given. There were total 2 tasks related to excel. 1st one was basic and second one was moderate level of difficulty. SQL queries were basic.

Q1. Questions were from the Assignment only. Approach to the problems.
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Q1. Basic HR questions like strength and weakness, why you want to join this organization
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Was good...and easy with maths problems.

Coding with your suited programming language.

Q1. What is the pivot table in Excel
Ans. 
A pivot table in Excel is a data summarization tool that allows you to reorganize and summarize selected columns and rows of data.
• Allows users to summarize and analyze large datasets

• Can easily reorganize data by dragging and dropping fields

• Provides options to calculate sums, averages, counts, etc. for data

• Helps in creating interactive reports and charts

• Useful for identifying trends and patterns in data
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Q2. A pivot table is used to summarize...........etc.
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Code signal , SQL python questions

Take home coding assignment - 10 days analysis and recommendations

Q1. 4 rounds - 1 behavioralm 2 case studies 1 presentation
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