IBM DB2 Questions et reponses d'entretien
Question 11. Explain the ACID properties in the context of DB2.
ACID stands for Atomicity, Consistency, Isolation, and Durability. These properties ensure the reliability of database transactions.
Question 12. What is a buffer pool in DB2?
A buffer pool is a memory area used to cache table and index data to reduce the I/O operations and improve query performance.
Question 13. How does DB2 handle concurrency control in a multi-user environment?
DB2 uses various concurrency control mechanisms, including locks and isolation levels, to ensure that transactions execute without interference from other transactions.
Question 14. What is the purpose of the LOAD utility in DB2?
The LOAD utility is used to efficiently load large amounts of data into DB2 tables. It is faster than using SQL INSERT statements for bulk data loading.
Question 15. Explain the difference between a view and a materialized query table (MQT) in DB2.
A view is a virtual table based on the result of a SELECT query, while an MQT is a physical table that stores the result of a query, and its data is updated periodically.
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