How are objects removed from working memory?

Question

Options

• AclearObject ()
• Bremoveobject()
• Cdelete statement
• Dretract statement

• B
  2% (1)
• C
  94% (51)
• D
  4% (2)

Explanation

In rules engines like Drools, the delete statement is the standard, modern way to remove a fact (object) from working memory during rule execution, making it the correct choice. Options A (clearObject()) and B (removeobject()) are fabricated method names that do not exist in any standard rules engine API. Option D (retract) is the tricky distractor - it was the original keyword in older versions of Drools (pre-6.0) and still works as an alias, but delete is the current preferred and official statement. For the exam, remember: "delete" is what you do when a fact is no longer true - just as you delete a record that shouldn't exist anymore. If your course material uses Drools 6.0+, delete is the answer; if you see both delete and retract as options, choose delete as the modern standard.

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