IBM DB2 11.1 Advanced DBA for Linux, UNIX, and Windows — Question 20

What is the primary use case for creating an index with the RANDOM option on a table?

Answer options

• A. Maximize performance with OLTP random key queries
• B. Maximize performance when inserting into an expression based index containing the RAND() function
• C. Minimize contention due to ascending key or descending key inserts, especially in a pureScale environment
• D. Minimize hashing skew on a table in a multiple database partition environment, especially with column organized tables C

Correct answer:

Explanation

The correct answer, C, is accurate because using the RANDOM option helps to reduce contention issues that arise from sequential key inserts in environments that require high concurrency. Options A, B, and D do not address the specific issue of insert contention associated with ordered keys, making them less relevant in this context.