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

Design - Interview Questions and Answers for 'Adapter' - 6 question(s) found - Order By Rating

Q1. What could be the real world example of Adapter Design Pattern ?

Design

Ans. Voltage converters / Power Adapters

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Q2. What are the disadvantages of Adapter Design Pattern ?

Design

Ans. It introduces a layer of adaptations before it reaches the final and desired interface.

Moreover sometimes all requests are forwarded to adapter class. Some of such requests doesn't even require any sort of adaptions as they are qualified to call the final interface directly and introducing overheads.

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Q3. What are the Wrapper classes available for primitive types ?

Core Java

Ans. boolean - java.lang.Boolean
byte - java.lang.Byte
char - java.lang.Character
double - java.lang.Double
float - java.lang.Float
int - java.lang.Integer
long - java.lang.Long
short - java.lang.Short
void - java.lang.Void

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Q4. What Design pattern Wrapper Classes implement ?

Design

Ans. Adapter.

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Q5. Difference between Proxy and Adapter ?

Design

Ans. Adapter object has a different input than the real subject whereas Proxy object has the same input as the real subject. Proxy object is such that it should be placed as it is in place of the real subject.

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Q6. Difference between Adapter and Facade ?

Design

Ans. The Difference between these patterns in only the intent. Adapter is used because the objects in current form cannot communicate where as in Facade , though the objects can communicate , A Facade object is placed between the client and subject to simplify the interface.

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