Specialization and generalization Mcqs and Answer

1. GENERALIZATION
AND
SPECIALIZATION
MCQ’S & ANSWERS
PART – 4
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2. KCC

3. 1. Root super class in diagrams of generalization and
specialization is considered as
A. three-tier class
B. two-tier class
C. base class
D. top class Answer: - C
2. Kind of subclass on which entity become part of subclass by
putting some condition on attribute values is classified as
A. predicate segregation subclass
B. predicate aggregation subclass
C. predicate-defined subclass
D. indicate-defined subclass Answer: - C
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4. 4. Generalization and specialization lattices are classified as
A. single aggregation
B. multiple inheritance
C. single inheritance
D. multiple aggregation
Answer: - B
Answer: - D
3. Main constraints applicable in specialization are
A. disjointness constraint
B. incomplete constraint
C. completeness constraint
D. both a and c
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5. 5. Representation of query in form of data structure is classified
as
A. query graph
B. query tree
C. scanner tree
D. parser tree
Answer: - B
Answer: - D
6. If in database of employees, Age attribute is derived
attribute then date of birth is classified as
A. logical attribute
B. physical attribute
C. conceptual attribute
D. stored attribute
K
C
C

6. 7. Considering constraints of generalization and specialization,
constraint of disjointness and completeness is usually
A. non calculated
B. non defined
C. independence
D. dependence
Answer: - C
8. Kind of class which does not have its own subclasses is called
A. leaf node
B. attribute node
C. overlapping node
D. disjoint node Answer: - A

7. Answer: - A
9. Type of lattice in which a subclass can be class or subclass
in more than one association of subclasses is classified as
A. attribution lattice
B. specialization lattice
C. generalization lattice
D. disjoint lattice
10. Kind of subclass in which there are no constraints for
deciding membership in any given subclass is classified as
A. visual subclass
B. user-defined subclass
C. member subclass
D. local subclass
Answer: - B
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8. 11. If super class contains entities in subclasses and is derived
from super class then super class is considered as
A. total
B. partial
C. overlap
D. disjoint
Answer: - A
Answer: - B
12. Subclass which has more than one super class is called
A. partial subclass
B. shared subclass
C. shared super class
D. joint super class
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9. 13. In process of specialization, specific attributes are also
classified as
A. public attributes
B. local attributes
C. aggregate attributes
D. segregate attributes
Answer: - B
14. In standard query language, rows and columns are called
respectively
A. tuple and attributes
B. quantifiers and identifiers
C. predicator and indicator
D. non-identifiers and quantifiers
Answer: - A
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