Answers to practice exam questions
| A1: | Answer: A. The other options describe valid general recommendations. Using an excessive number of ORDER BY clauses can negatively affect application and query performance. |
| A2: | Answer: C. Options A, B, and D identify valid recommendations for this situation. Option C is not a good recommendation because keeping tables that are used by the same applications together in the database can promote concurrency. |
| A3: | Answer: A. DB2 uses share locks, update locks, and exclusive locks, but not priority locks. |
| A4: | Answer: C. The statements in the other options are true. Option C is partially false because with RR isolation level, applications can read before the application reaches a commit point but they cannot update ... |
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