What is an example of an "IS-A" relationship? a column IS-A database a keyboard IS-A peripheral device a door IS-A window a teacher IS-A student a boy IS-A person a ball IS-A cube

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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### Understanding "IS-A" Relationships

**Question 14:**

Select all the correct text in the passage.

**What is an example of an "IS-A" relationship?**

- a column IS-A database
- a keyboard IS-A peripheral device
- a door IS-A window
- a teacher IS-A student
- a boy IS-A person
- a ball IS-A cube

**Explanation:**

In object-oriented programming, an "IS-A" relationship describes inheritance, where an instance of a subclass is also an instance of its superclass. Correct examples of "IS-A" relationships from the options include:

- **a keyboard IS-A peripheral device:** This indicates that a keyboard is a type of peripheral device.
- **a boy IS-A person:** This shows that a boy is a kind of person.
Transcribed Image Text:### Understanding "IS-A" Relationships **Question 14:** Select all the correct text in the passage. **What is an example of an "IS-A" relationship?** - a column IS-A database - a keyboard IS-A peripheral device - a door IS-A window - a teacher IS-A student - a boy IS-A person - a ball IS-A cube **Explanation:** In object-oriented programming, an "IS-A" relationship describes inheritance, where an instance of a subclass is also an instance of its superclass. Correct examples of "IS-A" relationships from the options include: - **a keyboard IS-A peripheral device:** This indicates that a keyboard is a type of peripheral device. - **a boy IS-A person:** This shows that a boy is a kind of person.
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