Which of the following are the features of Zend_Controller_Front?
Each correct answer represents a complete solution. Choose all that apply.
By default, the ErrorHandler plugin and ViewRenderer action helper plugin are loaded in Zend_Controller_Front.
It is used to register a plugin broker, which allows calling a user code when certain events occur in controller process.
It is used to implement the Singleton pattern.
It is used to handle the request and output.
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