Practice Real-world Analogy (19.2.2) - Dependency Injection and Inversion of Control

Practice: Real-world Analogy

Lesson 19.2.2Dependency Injection and Inversion of Control

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8 questions

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6 sample questions

Question 1.
What is Dependency Injection?
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Think of the television remote needing batteries.
Question 2.
Why is reducing tight coupling important in software design?
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Consider how changing batteries can make a remote work better.
3Question 3.
What does Dependency Injection allow an object to do?
- Create its own dependencies
- Receive dependencies from an external source
- Ignore dependencies completely
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Think about how the remote gets its power.
4Question 4.
True or False: Tight coupling makes a system easier to maintain.
- True
- False
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Recall how the remote would be affected by battery changes if it created its own batteries.
Question 5.
Design a small application in Java that utilizes Dependency Injection to manage a class representing a Smart Light and its required power source.
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Think about how you would approach creating a light that could use different types of energy sources.
Question 6.
Describe a situation where tight coupling could severely impact the maintainability of an application. Provide a solution that uses Dependency Injection.
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Consider the pros and cons of making every class responsible for creating its own dependencies.

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