_VOIS Data Engineer Interview Questions and Answers

Q1. Types of join and explain self join
Ans. 
Types of join include inner, outer, left, and right join. Self join is when a table is joined with itself.
• Types of join: inner, outer, left, right

• Self join: table is joined with itself

• Example: SELECT e1.name, e2.name FROM employees e1, employees e2 WHERE e1.manager_id = e2.employee_id
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Q2. 2nd highest salary in SQL
Ans. 
Use SQL query with ORDER BY and LIMIT to find the 2nd highest salary.
• Use SELECT statement to retrieve the salary column from the table.

• Use ORDER BY clause to sort the salaries in descending order.

• Use LIMIT 1,1 to skip the highest salary and retrieve the 2nd highest salary.
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Q1. Tell us about yourself
Ans. 
I am a data engineer with a strong background in programming and data analysis.
• Experienced in programming languages such as Python, SQL, and Java

• Skilled in data manipulation, ETL processes, and data modeling

• Worked on projects involving big data technologies like Hadoop and Spark
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Q2. Describe a situation where you had to deal with conflict in the workspace
Ans. 
Handled conflict by facilitating open communication and finding a mutually beneficial solution
• Identified the root cause of the conflict

• Encouraged all parties involved to share their perspectives

• Facilitated a discussion to find common ground and reach a resolution

• Ensured that all parties felt heard and respected

• Implemented strategies to prevent similar conflicts in the future
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Q1. About my previous project
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Q2. Questions where about pyspark
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Pattern Questions
Questions based on JP

Behavioral
Salary Discussion