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507 hiring manager interview questions shared by candidates

1. How do you access an element of a set? 2. What is the difference between list, tuple, and set? 3. What is the difference between append() and extend()? 4. How do you merge two dictionaries? 5. How do you check if a string contains only alphabets and numbers (no special characters)? 6. In SQL, how do you find the second highest salary employee from a department table? 7. What is the difference between DDL and DML? 8. How do you delete a row in SQL? 9. What do you know about ETL? 10. How do you update a certain key’s value in a dictionary? 11. What is encapsulation in Python? 12. Tell me about yourself, tell me about your education and career break And what kind of projects you recently worked on explain the projects. A lot of focus on Job role if you are lucky to know it and questions will be asked from that For example since this was a data engineering role They wanted someone efficient in Pyspark, Hadoop , ETL, A cloud service (Azure/AWS) and databricks especially SQL concepts.
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Data Engineer- Returnship Hiring

Interviewed at Cognizant

4★
Jan 17, 2026

1. How do you access an element of a set? 2. What is the difference between list, tuple, and set? 3. What is the difference between append() and extend()? 4. How do you merge two dictionaries? 5. How do you check if a string contains only alphabets and numbers (no special characters)? 6. In SQL, how do you find the second highest salary employee from a department table? 7. What is the difference between DDL and DML? 8. How do you delete a row in SQL? 9. What do you know about ETL? 10. How do you update a certain key’s value in a dictionary? 11. What is encapsulation in Python? 12. Tell me about yourself, tell me about your education and career break And what kind of projects you recently worked on explain the projects. A lot of focus on Job role if you are lucky to know it and questions will be asked from that For example since this was a data engineering role They wanted someone efficient in Pyspark, Hadoop , ETL, A cloud service (Azure/AWS) and databricks especially SQL concepts.

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