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Oracle

1Z0-060 · Question #152

Examine the types and examples of relationships that follow: 1. One-to-one

The correct answer is C. 1-c, 2-a, 3-b, and 4-d. This question tests the ability to correctly match database relationship types (one-to-one, one-to-many, many-to-many, and a fourth type) to their corresponding real-world examples.

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Question

Examine the types and examples of relationships that follow: 1. One-to-one

Options

  • A1-a, 2-b, 3-c, and 4-d
  • B1-c, 2-d, 3-a, and 4-b
  • C1-c, 2-a, 3-b, and 4-d
  • D1-d, 2-b, 3-a, and 4-c

How the community answered

(34 responses)
  • A
    3% (1)
  • B
    6% (2)
  • C
    88% (30)
  • D
    3% (1)

Why each option

This question tests the ability to correctly match database relationship types (one-to-one, one-to-many, many-to-many, and a fourth type) to their corresponding real-world examples.

A1-a, 2-b, 3-c, and 4-d

The mapping 1-a, 2-b, 3-c, 4-d incorrectly pairs each relationship type with examples that do not reflect the correct cardinality for that type.

B1-c, 2-d, 3-a, and 4-b

The mapping 1-c, 2-d, 3-a, 4-b correctly identifies the one-to-one example but misassigns the remaining relationship types to examples representing different cardinalities.

C1-c, 2-a, 3-b, and 4-dCorrect

The mapping 1-c, 2-a, 3-b, 4-d correctly pairs each relationship type with the example that accurately reflects its cardinality constraints. A one-to-one relationship (1-c) means each entity instance on both sides maps to exactly one counterpart, and the remaining mappings follow the defined minimum and maximum cardinality rules for each relationship type. This demonstrates understanding of how to identify relationship cardinality from real-world scenarios.

D1-d, 2-b, 3-a, and 4-c

The mapping 1-d, 2-b, 3-a, 4-c incorrectly pairs the one-to-one relationship with an example that represents a different cardinality, and similarly mismatches the remaining types.

Concept tested: Database relationship types and cardinality matching

Source: https://docs.oracle.com/cd/B10501_01/server.920/a96524/c21ordb.htm

Topics

#entity relationships#one-to-one#one-to-many#ER model

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