Bajaj Finserv Data Scientist 2 Interview Questions and Answers

Hackerrank test medium difficulty

Presenting the case study which was given as a take-home assignment

Python based EDA assignment

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Q1. Joins, functions in sql
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Logical reasoning ,quantitative aptitude

2 coding questions,one was easy and other was medium to tough level

Q1. Sql basics were asked and asked me to write few sql codes
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Q2. Python codes ,and machine learning concepts
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Q1. Get the maximum salary of the employee from the employee and department table
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Q2. Explain the data analysis process that you would follow for employee salary table
Ans. 
The data analysis process for an employee salary table involves data cleaning, exploration, visualization, and modeling.
• Start by cleaning the data to remove any duplicates, missing values, or outliers.

• Explore the data by calculating basic statistics like mean, median, and standard deviation.

• Visualize the data using histograms, box plots, or scatter plots to identify patterns or trends.

• Perform statistical modeling to an...read more
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Q3. Explain the challenges you faced in your project
Ans. 
I faced challenges in managing large datasets and ensuring data accuracy in my project.
• Managing large volumes of data from multiple sources

• Ensuring data accuracy and consistency

• Dealing with missing or incomplete data

• Handling data cleaning and preprocessing tasks

• Addressing technical issues with data storage or processing tools
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Q1. Interview was taken in malad on interface 7 building The relationship officer Vaibhav Panchal . He assigned Interviewer the way he was talking he was not able to speak in english half of the question i was...read more
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Q2. His english was poor How you will get the customer count who speak in english? he didn't gave me which table to fetch from ? * question changed get the customer from one table and count from the other ...read more
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It contained python coding questions as well as machine learning questions

Q1. Sql joins, python codes
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Q2. Complete codes and correct erros
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Q3. Machine learning
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Case study related to my project and background and internship

Q1. Reagrading Pandas,SQL
Ans. 
Pandas is a powerful data manipulation library in Python, while SQL is a language used for managing relational databases.
• Pandas is used for data cleaning, transformation, and analysis.

• SQL is used for querying and manipulating data in relational databases.

• Pandas can read data from various file formats like CSV, Excel, and SQL databases.

• SQL can perform complex operations like joining tables, filtering data, and aggregati...read more
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