Java Developer Mock Interview
Master 20 Java Developer interview questions covering OOP, Spring, multithreading, and system design.
Question 10 of 20
What is Composition, as used in Java?
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William Swansen has worked in the employment assistance realm since 2007. He is an author, job search strategist, and career advisor who helps individuals worldwide and in various professions to find their ideal careers.
As the interview progresses, the hiring manager will continue to ask you technical questions about writing programs within Java. Some of these will be very simple, asking you to define basic concepts that any programmer should know. Others will be more complex and require you to give longer, more complicated answers to define the concept, describe how it is used, and give an example of how to write the code. The best way to prepare for these is the practice these types of questions, stating the answers out loud, so you become comfortable doing this.
William Swansen has worked in the employment assistance realm since 2007. He is an author, job search strategist, and career advisor who helps individuals worldwide and in various professions to find their ideal careers.
"Composition is a method used in Java to implement has-a relationships within classes. This facilitates code reuse through object composition. When using composition, you implement instance variables that refer to different objects. The benefit is to provide visibility of the objects to other classes so they can reuse them."
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