GroMo job Trainee Interview Questions and Answers

Q1. Questions based on the understanding of joins in sql
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Q2. Convert row to columns using sql
Ans. 
Use SQL pivot function to convert rows to columns
• Use the PIVOT function in SQL to convert rows into columns

• Specify the columns you want to pivot on and the values you want to display in the new columns

• Example: SELECT * FROM table_name PIVOT (MAX(value_column) FOR pivot_column IN (column1, column2, column3)) AS alias_name
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Aptitude tests + 3 Rounds

Q1. Joins, SQL query execution
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Q2. Simple Sals Question - SQL
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Q1. Questions on probability and puzzles
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Q1. Joins, case when
Ans. 
Joins are used to combine rows from two or more tables based on a related column between them. Case when is a conditional statement used to perform different actions based on different conditions.
• Joins are used to retrieve data from multiple tables based on a related column

• Case when is used to perform different actions based on different conditions in SQL queries

• Example: SELECT * FROM table1 JOIN table2 ON table1.id = ...read more
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Q1. Result of different sql joins
Ans. 
SQL joins combine data from two or more tables based on a related column between them.
• Inner join returns rows that have matching values in both 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

• Full outer join returns all rows when there is a match in either left or right table
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Q1. Current CTC, Preferred location
Ans. 
Current CTC and preferred location are confidential information.
• Current CTC and preferred location are personal and confidential details.

• It is common practice not to disclose current CTC during interviews.

• Preferred location may vary based on individual circumstances and preferences.
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Q1. About yourself, projects worked, sql questions, Python questions
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