Database Data Modeling with ER Model Online Test, Data Modeling MCQ
Database Data Modeling with ER Model Online Test
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Database Data Modeling with ER Model Online Test. The Database Full online mock test paper is free for all students. Database Question and Answers. Database Online Mock test for Data Modeling with ER Model. Here we are providing Data Modeling with ER Model in English. Database Mock Test Series 2019.
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Question 1 of 30
1. Question
Which of the following indicates the maximum number of entities that can be involved in a relationship?
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Question 2 of 30
2. Question
Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier?
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Question 3 of 30
3. Question
In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.
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Question 4 of 30
4. Question
Which type of entity represents an actual occurrence of an associated generalized entity?
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Question 5 of 30
5. Question
A recursive relationship is a relationship between an entity and ________ .
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Question 6 of 30
6. Question
Which of the following indicates the minimum number of entities that must be involved in a relationship?
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Question 7 of 30
7. Question
Which of the following refers to something that can be identified in the users’ work environment, something that the users want to track?
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Question 8 of 30
8. Question
In which of the following is a single-entity instance of one type related to many entity instances of another type?
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Question 9 of 30
9. Question
Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity?
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Question 10 of 30
10. Question
Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity?
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Question 11 of 30
11. Question
An attribute that names or identifies entity instances is a(n):
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Question 12 of 30
12. Question
Properties that describe the characteristics of entities are called:
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Question 13 of 30
13. Question
In which of the following can many entity instances of one type be related to many entity instances of another type?
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Question 14 of 30
14. Question
Entities of a given type are grouped into a(n):
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Question 15 of 30
15. Question
Which of the following is NOT a basic element of all versions of the E-R model?
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Question 16 of 30
16. Question
In which of the following is a single-entity instance of one type of related to a single-entity instance of another type?
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Question 17 of 30
17. Question
Entities can be associated with one another in which of the following?
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Question 18 of 30
18. Question
Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator?
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Question 19 of 30
19. Question
Which type of entity represents a logical generalization whose actual occurrence is represented by a second, associated entity?
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Question 20 of 30
20. Question
In a one-to-many relationship, the entity that is on the many side of the relationship is called a(n) ________ entity.
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Question 21 of 30
21. Question
An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.
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Question 22 of 30
22. Question
A ternary relationship is so called because in contains two entities and one association between them.
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Question 23 of 30
23. Question
All instances of an entity class have the same attributes.
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Question 24 of 30
24. Question
A minimum cardinality is the minimum number of entity instances that may participate in a relationship instance.
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Question 25 of 30
25. Question
An attribute describes the entity’s characteristics.
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Question 26 of 30
26. Question
The degree of a relationship refers to the number of entity classes in the relationship.
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Question 27 of 30
27. Question
Entities use identifiers while tables use keys.
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Question 28 of 30
28. Question
Composite identifiers consist of two or more attributes.
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Question 29 of 30
29. Question
When designing a database, first identify the entities, then determine the attributes, and finally establish the relationships.
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Question 30 of 30
30. Question
A subtype entity is a special case of another entity called a supertype entity.
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