Expedia Interview Question for Software Engineer / Developers






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Use object composition & delegation. (Adapter pattern comes to mind.) For e.g, you can add the public interface of both A & B to C, and have A & B objects as members of C. One of the issues with this is ambiguity resolution when the name & prototypes are identical - in that case you can use RTTI feature to do the appropriate delegation.

- acoder September 21, 2008 | Flag Reply
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Or have C inherit from A, and have C contain B.

- anon September 21, 2008 | Flag Reply
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use interfaces

- rt October 16, 2008 | Flag Reply
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Two ways to do this in Java:
Let the classes be A, B and C.
Assume C wants to inherit from A and B.

1)Have B extend A (or vice versa) and C extend B. This can be done only if you own all the 3 classes.

2)Have B contain A i.e. B HAS-A A. And make C extend B.

- badalrocks January 06, 2009 | Flag Reply
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using interface and default function implementation of java 8 interface feature we can achieve this.

- Kapil July 14, 2017 | Flag Reply


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