Principal Global Services Data Analyst Interview Questions and Answers

Basic 10 apti question

Basic 5 python question

Basic 5 SQL question

Q1. They asked two python program.
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Q1. They asked one SQL question
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Q1. Just question based on my resume.
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Q1. Tell me about your self?
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Q2. What is SQL and diffrent joins in SQL?
Ans. 
SQL is a programming language used for managing and manipulating relational databases. Different joins in SQL include inner join, outer join, left join, and right join.
• SQL is a standard programming language for managing and manipulating relational databases.

• Different types of joins in SQL include inner join, outer join, left join, and right join.

• Inner join returns rows when there is at least one match in both tables.

• Ou...read more
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Q3. How to separate portion before @ and after @ from mail using python?
Ans. 
Use Python to separate portion before and after @ in an email address.
• Use the split() method to separate the email address into two parts based on the @ symbol.

• Access the parts using index 0 for the portion before @ and index 1 for the portion after @.

• Example: email = 'example@email.com'; parts = email.split('@'); before = parts[0]; after = parts[1];
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Q4. What is the rank, Dense Rank and Row Number?
Ans. 
Rank, Dense Rank, and Row Number are functions used in SQL to assign a ranking to rows in a result set.
• Rank function assigns a unique rank to each row based on the specified column values.

• Dense Rank function assigns a unique rank to each row without any gaps.

• Row Number function assigns a sequential integer to each row in the result set.
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Q1. Regularizaion, model improvemnts
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Q2. Hyperparameter tuning
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Q1. Sql indexing. window function.
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Q2. Many other sql questins were there
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Q1. 5 year goal. where do you see yourself.
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Q1. Why do you want to join this company?
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Q1. What is your strength?
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Q1. What is joins in SQL?
Ans. 
Joins in SQL are used to combine rows from two or more tables based on a related column between them.
• Joins are used to retrieve data from multiple tables based on a related column.

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;
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Q1. How do you maintain your work life balance?
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Q1. Tell me about yourself
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Number series
Simplification