EDF India Data Analyst Intern Interview Questions and Answers

HackerRank Test - Python, SQL

Q1. Core python,python library and data science
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Q1. Mathematics,python and sql and data science are complete
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I was asked a medium-level SQL question that involved the RANK function.

Q1. Previous company experience and current company roles and responsibilities
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Q1. SQL related questions like joins
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Q2. Types of join in sql
Ans. 
Types of join in SQL include inner join, left join, right join, and full outer join.
• Inner join returns only the matching records from both tables.

• Left join returns all records from the left table and the matching records from the right table.

• Right join returns all records from the right table and the matching records from the left table.

• Full outer join returns all records when there is a match in either the left or rig
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Q3. Practical use of left join
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A left join is used to combine data from two tables based on a common column, including all records from the left table.
• Left join returns all rows from the left table and the matching rows from the right table.

• It is useful when you want to retrieve all records from the left table, even if there are no matches in the right table.

• The result of a left join will have NULL values in the columns from the right table where th...read more
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Q4. Number of rows after applying certain join operations
Ans. 
The number of rows after applying join operations depends on the type of join used and the data in the tables being joined.
• Inner join retains only the rows that have matching values in both tables

• Left join retains all rows from the left table and the matched rows from the right table

• Right join retains all rows from the right table and the matched rows from the left table

• Full outer join retains all rows when there is a
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Q5. Difference between vlookup in excel and some function in sql
Ans. 
VLOOKUP in Excel is used to search for a value in a table and return a corresponding value, while SQL functions like JOIN and WHERE are used to retrieve data from multiple tables based on specified conditions.
• VLOOKUP is specific to Excel and works on a single table, while SQL functions can work on multiple tables.

• VLOOKUP requires the table to be sorted in ascending order, while SQL functions do not have this requiremen...read more
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Simple SQL & Excel test

Q1. Will Face hiring Manager
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1 hour test maths reasoning and english

Aptitude test is a way for employers to assess a candidate's abilities through a variety of different testing formats. Aptitude tests will test your ability to perform tasks and react to situations at work. This includes: problem-solving.

Q1. Tell me something about yourself. How did you hear about this position? Why do you want to work here?
Ans. Hi thank you for giving me this opportunity to introduce my self lakshmi r am basically from doddballapur i graduate in b. Com from banglore north university
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Q2. What is your greatest strength? What are your strengths and weaknesses? What do you know about this company/organization?
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