Answers to practice exam questions
| A1: | Answer: D. |
| A2: | Answer: D. The other definitions are incorrect. REAL data consists of single-precision floating-point numbers, which can be less than, equal to, or greater than 21. DOUBLE data consists of double-precision floating-point numbers. SMALLINT data consists of small integers, but they need not be less than 22. |
| A3: | Answer: B and D. The statements in the other options are false. Option A is false because no user-defined settings control how DB2 treats null values. Option C is false because a null value is not equivalent to a blank. Option E is false because a null value is not equivalent to a zero value. |
| A4: | Answer: A. The statements in the other options are true. Option A is false because using an index ... |
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