What identifies a controller as being an extension? : salesforce visualforce
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Answer / Shweta Paedey
{"extension": "In Visualforce, a controller is identified as an extension when it extends another Visualforce controller. This allows you to add new functionality or modify existing functionality of the original controller without replacing it. To create an extension, use the 'extends' keyword in the controller's declaration and specify the name of the controller being extended."}
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