Design - Interview Questions and Answers for 'Reflection' | Search Interview Question

Design - Interview Questions and Answers for 'Reflection' - 7 question(s) found - Order By Rating

Q1. Can you tell us a use case of reflection in java that you have applied ?

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Q2. How Reflection can break any design pattern ?

Design

Ans. Using java reflection api, we can tweak into a class and modify it's runtime behavior and hence modify the pattern it might be using.

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Q3. What is reflection ?

Ans. It is the process of examining / modifying the behaviour of an object at runtime.

Sample Code for reflection

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Q4. Is It Good to use Reflection in an application ? Why ?

Core Java

Ans. no, It's like challenging the design of application.

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Q5. Why is Reflection slower ?

Ans. Because it has to inspect the metadata in the bytecode instead of just using precompiled addresses and constants.

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Q6. How can we test methods individually which are not visible or declared private ?

Ans. We can either increase their visibility and mark them with annotation @VisibleForTesting or can use reflection to individually test those methods.

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Q7. What is the use of MethodHandle ?

Ans. MethodHandle is a modern, more flexible, more typesafe way of doing reflection.

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