Battery Smart Data Engineer Interview Questions and Answers

SQL, excel, tableau , looker studio

Q1. What is your notice period.
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Q1. Difference between logistic regression and svm
Ans. 
Logistic regression is a linear model used for binary classification, while SVM is a non-linear model that can handle complex decision boundaries.
• Logistic regression is a probabilistic model that predicts the probability of a binary outcome based on input features.

• SVM aims to find the hyperplane that best separates the classes in a high-dimensional space.

• Logistic regression is more interpretable and easier to implement...read more
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Q2. Data augmentation related questions
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Q1. Difference between Drop and Truncate ?
Ans. 
Drop deletes the table structure and data, while truncate only deletes the data.
• Drop is a DDL (Data Definition Language) command, while truncate is a DML (Data Manipulation Language) command.

• Drop removes the table from the database, while truncate only removes the rows from the table.

• Drop is slower and requires more permissions than truncate.

• Example: DROP TABLE table_name; TRUNCATE TABLE table_name;
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Q2. To write SQL queries
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Q1. Why you are switching to non-core?
Ans. 
I am switching to non-core because I want to explore new opportunities and challenges outside of my current field.
• Seeking new challenges and opportunities

• Exploring different industries and roles

• Developing new skills and gaining diverse experience
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Q2. What are your expected salary?
Ans. 
I am looking for a competitive salary that reflects my skills and experience in the data analysis field.
• Research the average salary for Data Analysts in your area to have a realistic expectation

• Consider your level of experience, education, and any specialized skills you bring to the table

• Be prepared to negotiate based on the company's budget and benefits package
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Easy DSA questions , SQL, Aptitude,

Topic on Today's Relevance - EV in India

Had assignment for ror and react basic crud

Q1. Elevator problem in java
Ans. 
Elevator problem in Java
• Create an Elevator class with methods for moving up and down

• Use a Queue to keep track of the floors that need to be visited

• Implement a scheduling algorithm to determine the order of floor visits
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Q2. Horse race puzzle solution
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