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DBMS Generalization, Specialization, and Aggregation Multiple-Choice Questions (MCQs)

DBMS Generalization, Specialization, and Aggregation MCQs: This section contains DBMS Generalization, Specialization, and Aggregation Multiple-Choice Questions (MCQs) and Answers.
Submitted by Anushree Goswami, on February 16, 2022

1. The generalization process is similar to the bottom-up approach.

  1. Top-Bottom
  2. Top-Up
  3. Bottom-Up
  4. Up-Bottom

Answer: C) Bottom-Up

Explanation:

The generalization process is similar to the bottom-up approach.

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2. When two or more lower-level entities share some attributes, they lead to a ___. This is often referred to as a bottom-up approach.

  1. Lower-level entity
  2. Higher-level entity
  3. Middle-level entity
  4. Center-level entity

Answer: B) Higher-level entity

Explanation:

When two or more lower-level entities share some attributes, they lead to a higher-level entity. This is often referred to as a bottom-up approach.

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3. As a general rule, entities at higher levels can combine with entities at lower levels to form a ___ level entity.

  1. Lower
  2. Higher
  3. Middle
  4. Central

Answer: B) Higher

Explanation:

As a general rule, entities at higher levels can combine with entities at lower levels to form a higher-level entity.

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4. There are more ___ in generalization.

  1. Subclasses
  2. Superclasses
  3. Both a and b
  4. None of the above

Answer: A) Subclasses

Explanation:

There are more subclasses and superclasses in generalization.

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5. A ___ entity is created by combining entities.

  1. Generalized
  2. Higher-level
  3. Lower-level
  4. Middle-level

Answer: A) Generalized

Explanation:

A generalized entity is created by combining entities.

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6. Specialization is a –

  1. Bottom-Up
  2. Top-Up
  3. Top-Down
  4. Bottom-Top

Answer: C) Top-Down

Explanation:

Specialization is a Top-Down approach.

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7. Several lower-level entities can be decomposed into one higher-level entity in ___.

  1. Generalization
  2. Specialization
  3. Both A. and B.
  4. None of the above

Answer: B) Specialization

Explanation:

Several lower-level entities can be decomposed into one higher-level entity in specialization.

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8. The term specialization refers to a ___ of a set of entities which share some distinguishing characteristics.

  1. Subset
  2. Set
  3. Superset
  4. Upperset

Answer: A) Subset

Explanation:

The term specialization refers to a subset of a set of entities which share some distinguishing characteristics.

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9. ___ are defined first, followed by subclasses and their associated attributes, followed by the relationship set.

  1. Subclasses
  2. Superclasses
  3. Classes
  4. Fields

Answer: B) Superclasses

Explanation:

Superclasses are defined first, followed by subclasses and their associated attributes, followed by the relationship set.

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10. What is the difference between Generalization and Specialization?

  1. Generalization and Specialization is like the Bottom-Up Approach
  2. Generalization and Specialization is like the Top-Down Approach
  3. Generalization is like the Top-Down approach and Specialization is like the Bottom-Up Approach
  4. Generalization is like a Bottom-Up approach and Specialization is like a Top-Down Approach

Answer: D) Generalization is like a Bottom-Up approach and Specialization is like a Top-Down Approach

Explanation:

Generalization is like a Bottom-Up approach and Specialization is like a Top-Down Approach.

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11. When two different entities are aggregations, they are treated as if they were ___.

  1. Double
  2. Single
  3. Triple
  4. Many

Answer: B) Single

Explanation:

When two different entities are aggregations, they are treated as if they were Single.

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12. When entities are aggregated, their relationships with each other are combined into ___.

  1. Higher-level entity
  2. Lower-level entity
  3. Middle-level entity
  4. Central-level entity

Answer: A) Higher-level entity

Explanation:

When entities are aggregated, their relationships with each other are combined into higher-level entities.

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