_VOIS Data Engineer Interview Questions and Answers

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

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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