Practice Annotations In Java (7.1) - Annotations and Reflection API

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10 questions

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4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is an annotation in Java?
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Think about external information added to code.
Question 2.
What does the @Override annotation do?
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Consider how this relates to inheritance.
3Question 3.
What is the main purpose of annotations in Java?
- Modify code execution
- Provide metadata
- Add comments
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Think about what 'metadata' means.
4Question 4.
True or False: Annotations can directly alter the logic of code.
- True
- False
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Consider how annotations are defined and what they do.
Question 5.
Create a custom annotation called @JsonSerializable that can be applied to classes, making them JSON serializable.
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Think about what information you'd want to mark for serialization.
Question 6.
Explain how you would implement a processor that reads @JsonSerializable annotations and converts annotated classes to JSON.
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Consider the steps of using reflection and what library you might use for JSON operations.

6 more questions in this section. Enroll free to practise them all.