Database - Modeling Data in the Organization MCQs Part

1. A binary relationship is which of the following?

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

 Answer Option B

2. 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?

A.
Derived attribute
B.
Optional one cardinality
C.
Multi-valued attribute
D.
Weak entity

 Answer Option D

3. A relationship is which of the following?

A.
A person, place, or thing
B.
Property or characteristic of an entity
C.
Link between entities
D.
Weak entity

 Answer Option C

4. Which of the following conditions should exist if you want to convert a relationship to an associative entity?

A.
Some of the relationships for the participating entities are "many".
B.
The resulting associative entity has an independent meaning.
C.
The resulting associative entity has no attributes.
D.
All of the above

 Answer Option B

5. A good identifier is which of the following?

A.
One that can change over time
B.
Can be null
C.
One that is unique
D.
Be intelligent

 Answer Option C

6. A rectangle represents which of the following in an ERD?

A. Attribute
B. Entity
C. Optional One
D. Relationship

 Answer Option B

7. An entity name should be which of the following?

A. A singular noun
B. Specific to the organization
C. Concise
D. All of the above.

 Answer Option D

8. An oval represents which of the following in an ERD?

A. Attribute
B. Entity
C. Optional One
D. Relationship

 Answer Option A

9. When the minimum and maximum number of instances of an entity is one, you know which of the following?

A. Mandatory one
B. Optional one
C. Mandatory many
D. Cannot tell

 Answer Option A

10. An attribute name should be which of the following?

A. Singular verb or verb phrase
B. Follow a standard format
C. Use a alias
D. All of the above.

 Answer Option B

11. A composite attribute is which of the following?

A. An attribute that can be broken into components
B. An attribute that cannot be broken into components
C. Multiple attributes
D. An identifier

 Answer Option A

12. A binary relationship cannot be which of the following?

A. One-to-One
B. One-to-Many
C. Many-to-Many
D. Zero-to-Zero

 Answer Option D

13. A ternary relationship involves how many entities?

A. 3 or less
B. 3
C. More than 3
D. 3 or more

 Answer Option B

14. When the minimum number of instances of an entity is one, you know which of the following?

A. Mandatory one
B. Optional one
C. Mandatory many
D. Cannot tell

 Answer Option D

15. A good business rule is which of the following?

A. Declarative
B. Imprecise
C. Redundant
D. Compound

 Answer Option A

6. A rectangle represents which of the following in an ERD?

A. Attribute
B. Entity
C. Optional One
D. Relationship

 Answer Option B

7. An entity name should be which of the following?

A. A singular noun
B. Specific to the organization
C. Concise
D. All of the above.

 Answer Option D

8. An oval represents which of the following in an ERD?

A. Attribute
B. Entity
C. Optional One
D. Relationship

 Answer Option A

9. When the minimum and maximum number of instances of an entity is one, you know which of the following?

A. Mandatory one
B. Optional one
C. Mandatory many
D. Cannot tell

 Answer Option A

10. An attribute name should be which of the following?

A. Singular verb or verb phrase
B. Follow a standard format
C. Use a alias
D. All of the above.

 Answer Option B

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