11. A relation has which of the following properties? A. Each row is not unique. B. Attributes can have the same name within a given table. C. Each relation has a unique name. D. The order of the columns is significant. Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
12. When mapping a ternary relationship with an associative entity into a relation which of the following is true? A. One relation is created. B. Two relations are created. C. Three relations are created. D. Four relations are created. Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
13. When mapping a regular entity into a relation which of the following is true? A. One relation is created. B. Two relations are created. C. Three relations are created. D. Four relations are created. Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
14. When mapping a supertype/subtype relationship which of the following is true? A. The supertype primary key is assigned to each subtype. B. The subtype primary key is assigned to each supertype. C. There is no link between the supertype/subtype entities. D. There is no primary key/foreign key relationship between a supertype/subtype. Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
15. Relations are: A. two-dimensional tables. B. three-dimensional tables. C. four-dimensional tables. D. five-dimensional tables. Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
16. An enterprise key is a primary key whose value is unique for a given relation. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
17. A composite attribute does not get mapped into a relation. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
18. A relation is a two-dimensional table. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
19. Weak entities do not get mapped into a relation. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
20. A primary key may be null. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
