MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Rdbms knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A _________ Fc for F is a set of dependencies such that F logically implies all dependencies in Fc, and Fc logically implies all dependencies in F. |
| A. | tCanonical cover |
| B. | tComplete cover |
| C. | tCanonical dependency |
| D. | tCanonical clause |
| Answer» B. tComplete cover | |
| 2. |
We say that a decomposition having the property F + = F+ is a __________ decomposition. |
| A. | tDependency losing |
| B. | tDependency preserving |
| C. | tLossless |
| D. | tNone of the mentioned |
| Answer» C. tLossless | |
| 3. |
If B is an attribute and A B, Then B is said to be ________ by a. |
| A. | tLogically implied |
| B. | tFunctionally implied |
| C. | tLogically determined |
| D. | tFunctionally determined |
| Answer» E. | |
| 4. |
If A B, A C then which of the following is true? |
| A. | tA BC |
| B. | tA B |
| C. | tA C |
| D. | tAll of the mentioned |
| Answer» E. | |
| 5. |
State true or false: Armstrong s axioms allow us to generate all F+ for any given F |
| A. | tTrue |
| B. | tFalse |
| Answer» B. tFalse | |