Let us see the Data models important Questions Answers.
1. A low level of data models is also called?
A. conceptual data models
B. Logical data models
C. Network models
D. physical data model
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2. Which one of the following is an example of the object-based logical model?
A. network model
B. conceptual model
C. relational model
D. entity relationship model
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3. How many categories of data models in DBMS?
A. 3
B. 5
C. 4
D. none of these
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4. In DBMS data models are classified into
A. object-based logical model
B. physical data model
C. record-based data models
D. all of these
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5. Which of the following design is both for software and hardware?
A. Network model
B. conceptual model
C. physical model
D. none of these
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6. The term which is used to represent real-world concept or object is classified as
A. Attribute
B. relationship
C. object
D. entity
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7. Possibly cardinality relation in the binary ratio are as follows
A. one to many
B. many to one
C. one to one
D. all of the above
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8. Association for several entities is called as?
A. relationship
B. object
C. association
D. none of these
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9. Manager salary’s information are hidden from employee this is called as?
A. physical-based data hiding
B. network-based data hiding
C. conceptual based data hiding
D. internal level data hiding
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10. Which form of the data model is used for the focuses concept in the same ways as data stored in the computer system that can be classified as?
A. dynamic data models
B. network data model
C. low-level data model
D. conceptual data model
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11. The classification of the set of all entities having the same attributes is as?
A. function type
B. attributes type
C. relationship type
D. entity type
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12. Values in object oriented models are stored in.
A. global
B. local
C. static
D. instance
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13. A scheme in data models can be described as?
A. record and files
B. data element
C. record relationship
D. all of these
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14. Arrangements of attributes into hierarchy are called?
A. Simple attribute
B. simple value attribute
C. composition attribute
D. none of these
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15. Collection of tables that can represent both data relationships described as?
A. entity model
B. relationship model
C. relational model
D. network model
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16. Which operations are specified on objects is the type of diagram?
A. attributes diagrams
B. class diagrams
C. entity diagrams
D. none of these
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17. An abstraction concept for building a composite object from their component object is?
A. generalization
B. association
C. aggregation
D. specialization
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18. Which of the following is a lowest level data model?
A. logical data model
B. physical data model
C. network data model
D. none of these
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19. The specific set of attributes that one is the object is distinguishable from other attributes is called?
A. relationship
B. entity
C. attributes
D. classes
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