Merilytics Data Engineer 1 Interview Questions and Answers

Aptitude test contains of programming language and aptitude questions

Q1. Tell us about yourself
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Q2. Which is your favourite programming language
Ans. 
My favorite programming language is Python because of its readability, versatility, and extensive libraries.
• Python is known for its readability, making it easier to write and maintain code.

• Python is versatile and can be used for web development, data analysis, machine learning, and more.

• Python has a vast collection of libraries like NumPy, Pandas, and Matplotlib that make data manipulation and visualization easier.
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Q1. What are SQL commands
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SQL commands are instructions used to interact with databases to perform tasks such as querying, updating, and managing data.
• SQL commands are used to perform various operations on databases, such as SELECT, INSERT, UPDATE, DELETE.

• Examples of SQL commands include SELECT * FROM table_name, INSERT INTO table_name (column1, column2) VALUES (value1, value2), UPDATE table_name SET column1 = value1 WHERE condition, DELETE FRO...read more
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Q2. Difference between left and right join
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Left join returns all records from the left table and the matched records from the right table, while right join returns all records from the right table and the matched records from the left table.
• Left join keeps all records from the left table, even if there are no matches in the right table.

• Right join keeps all records from the right table, even if there are no matches in the left table.

• Example: If we have a table o...read more
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