Preparing for a database interview? If the job involves IBM DB2, you’ll definitely want to study the most frequently asked db2 interview questions.
DB2 is widely used across industries for managing large databases, especially in mainframe environments.
This guide covers both beginner and advanced DB2 concepts to help you confidently crack your upcoming interview!

Let’s dive in!

What is DB2?

DB2 is a family of data management products, including database servers developed by IBM. It supports the relational model and object-relational features, making it powerful for handling complex and high-volume database tasks.

People Also Ask: DB2 Interview Questions and Answers

1. What is DB2?
DB2 is IBM’s database management system designed to store, analyze, and retrieve the data efficiently for various applications.

2. What are the main features of DB2?

• High scalability
• Data compression
• XML support
• Advanced security features
• High availability options

3. What is a Tablespace in DB2?
A tablespace is a storage structure containing tables, indexes, large objects, and long data.

4. What are Buffer Pools in DB2?
Buffer pools are areas of memory used to cache table and index data to improve database performance.

5. What is a Cursor in DB2?
A Cursor allows row-by-row processing of SQL query results.

6. What is the difference between Static SQL and Dynamic SQL in DB2?

• Static SQL: SQL statements are precompiled and stored in the database.
• Dynamic SQL: SQL statements are created and executed at runtime.

7. What is a View in DB2?
A View is a virtual table representing the result of a database query.

8. What are the types of locks in DB2?

• Shared lock
• Exclusive lock
• Update lock
• Intent locks

9. How do you improve DB2 performance?

• Use appropriate indexing
• Optimize SQL queries
• Adjust buffer pool settings
• Regularly reorganize tables and indexes

10. What is the significance of RUNSTATS in DB2?
RUNSTATS gathers statistics about tables and indexes, helping the optimizer choose the most efficient access paths.

11. What is REORG in DB2?
REORG is used to reorganize the data of a table to improve performance and recover fragmented space.

12. What is the function of COMMIT and ROLLBACK in DB2?

• COMMIT saves all changes made in the transaction permanently.
• ROLLBACK undoes all changes made in the transaction.

13. What is an Alias in DB2?
An Alias is an alternative name for a table or a view, useful for managing object dependencies.

14. What are Check Constraints in DB2?
Check constraints ensure that values in a column meet specific criteria before they are inserted or updated.

15. What is the use of the LOAD utility in DB2?
The LOAD utility quickly loads large amounts of data into DB2 tables with minimal logging.

16. What is SQLCA in DB2?
SQLCA (SQL Communications Area) is a structure used to return feedback to programs after SQL operations.

17. How do you retrieve the current date in DB2?
Use the query: