Which method finalizes the object in the Builder pattern?

Which method finalizes the object in the Builder pattern?

• A. finalize()
• B. getResult()
• C. assemble()
• D. build()

Answer: (D)

In the Builder pattern, you configure a complex object piece by piece and then need a final step that produces the finished product. The method that finalizes and returns the built object is named build() because it clearly communicates the transition from “pieces are configured” to “the product is ready.” It encapsulates the idea that, after all parts are set up, calling this method assembles and returns the final object, possibly performing final validation in the process. This naming makes the intended flow obvious: set up the builder with the desired parts, then call a single method to obtain the completed object. Other choices don’t fit as well: finalize() is typically associated with cleanup or destruction, not construction; getResult() is vague and not a standard convention for producing the product; assemble() describes the act of putting parts together but doesn’t by itself signal that the final object is returned. Build() is the most expressive and conventional way to indicate that the object is now complete and ready for use.

In the Builder pattern, you configure a complex object piece by piece and then need a final step that produces the finished product. The method that finalizes and returns the built object is named build() because it clearly communicates the transition from “pieces are configured” to “the product is ready.” It encapsulates the idea that, after all parts are set up, calling this method assembles and returns the final object, possibly performing final validation in the process.

This naming makes the intended flow obvious: set up the builder with the desired parts, then call a single method to obtain the completed object. Other choices don’t fit as well: finalize() is typically associated with cleanup or destruction, not construction; getResult() is vague and not a standard convention for producing the product; assemble() describes the act of putting parts together but doesn’t by itself signal that the final object is returned. Build() is the most expressive and conventional way to indicate that the object is now complete and ready for use.