Discussion
Home ‣ Database ‣ Modeling Data in the Organization Comments
- Question
An oval represents which of the following in an ERD?
Options- A. Attribute
- B. Entity
- C. Optional One
- D. Relationship
- Correct Answer
- Attribute
- 1. When the minimum and maximum number of instances of an entity is one, you know which of the following?
Options- A. Mandatory one
- B. Optional one
- C. Mandatory many
- D. Cannot tell Discuss
- 2. A good business rule is which of the following?
Options- A. Declarative
- B. Imprecise
- C. Redundant
- D. Compound Discuss
- 3. An entity name should be which of the following?
Options- A. A singular noun
- B. Specific to the organization
- C. Concise
- D. All of the above. Discuss
- 4. A good identifier is which of the following?
Options- A. One that can change over time
- B. Can be null
- C. One that is unique
- D. Be intelligent Discuss
- 5. A ternary relationship involves how many entities?
Options- A. 3 or less
- B. 3
- C. More than 3
- D. 3 or more Discuss
- 6. A composite attribute is which of the following?
Options- A. An attribute that can be broken into components
- B. An attribute that cannot be broken into components
- C. Multiple attributes
- D. An identifier Discuss
- 7. An attribute name should be which of the following?
Options- A. Singular verb or verb phrase
- B. Follow a standard format
- C. Use a alias
- D. All of the above. Discuss
- 8. When the minimum number of instances of an entity is one, you know which of the following?
Options- A. Mandatory one
- B. Optional one
- C. Mandatory many
- D. Cannot tell Discuss
- 9. If there are two entities with a relationship between them, and one of the entities is completely dependent on the other, then which of the following must exist?
Options- A. Derived attribute
- B. Optional one cardinality
- C. Multi-valued attribute
- D. Weak entity Discuss
- 10. A binary relationship is which of the following?
Options- A. A relationship between two attributes
- B. A relationship between two entities
- C. An attribute with two different relationships
- D. An entity with two different relationships Discuss
Modeling Data in the Organization problems
Search Results
Correct Answer: Mandatory one
Correct Answer: Declarative
Correct Answer: All of the above.
Correct Answer: One that is unique
Correct Answer: 3
Correct Answer: An attribute that can be broken into components
Correct Answer: Follow a standard format
Correct Answer: Cannot tell
Correct Answer: Weak entity
Correct Answer: A relationship between two entities
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