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The interface com.bluemartini.dna.Callback contains only single method that has to be implemented. Select the method signature

  1. public DNAList init(DNA dnaIn) throws BMException;

  2. public DNAList execute(DNAList dnaIn) throws BMException;

  3. public DNA execute(DNA dnaIn) throws BMException;

  4. public DNA start(DNAList dnaIn) throws BMException;
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B Correct answer
Explanation

The com.bluemartini.dna.Callback interface requires implementation of the execute() method, which takes a DNAList input parameter and returns a DNAList. This is the standard callback pattern for custom business logic execution in Blue Martini's DNA framework.

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