Tata Group Data Analyst Interview Questions and Answers

Q1. Can you tell me about yourself? Why do you want to work as a data analyst? What do you know about our company?
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Q2. What are your short-term and long-term career goals in the field of data analysis? Why do you wish to pursue a career in data analysis? What factors motivate you to work in a data-driven environment?
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Q1. Excel Assignment
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Q2. SQL assignment : joints , data extraction
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Q1. What are the different kinds of joins
Ans. 
Different kinds of joins include inner join, outer join, left join, and right join.
• Inner join: Returns only the rows that have matching values in both tables.

• Outer join: Returns all rows when there is a match in one of the tables.

• Left join: Returns all rows from the left table and the matched rows from the right table.

• Right join: Returns all rows from the right table and the matched rows from the left table.
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Q2. What is the difference between columns and measures in power BI
Ans. 
Columns are the fields in a dataset, while measures are calculations based on those fields in Power BI.
• Columns are the raw data fields in a dataset, such as 'Sales Amount' or 'Product Category'.

• Measures are calculations performed on columns, like sum, average, count, etc.

• Measures are created using DAX (Data Analysis Expressions) in Power BI.

• Columns are used for grouping, filtering, and slicing data, while measures are
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Q3. How can you remove duplicates in sql
Ans. 
Use the DISTINCT keyword in a SELECT statement to remove duplicates in SQL.
• Use the DISTINCT keyword in a SELECT statement to retrieve unique values.

• Example: SELECT DISTINCT column_name FROM table_name;

• Another way is to use the GROUP BY clause to remove duplicates.

• Example: SELECT column_name FROM table_name GROUP BY column_name;
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Q1. Self introduction
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Q2. Previous job experiences
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Algebra, percentage, questions

Python, MySQL, machine learning, power Bi

Q1. According to my knowledge
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Q2. Introduce yourself
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Q1. About Scala and spark
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Q1. SQL and scala coding
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