A developer needs to declare an observer that listens for the 'catalog_product_save_before' event. In which XML file must this observer be registered?

Question

Options

• A'etc/events.xml'
• B'etc/config.xml'
• C'etc/module.xml'
• D'etc/di.xml'

• A
  71% (30)
• B
  5% (2)
• C
  17% (7)
• D
  7% (3)

Explanation

In Magento 2, observers are registered in etc/events.xml (or etc/frontend/events.xml / etc/adminhtml/events.xml for area-specific scope), which is the dedicated configuration file that maps event names to observer classes - making A correct. etc/config.xml is for module default configuration values (store settings, flags), not event wiring. etc/module.xml only declares the module's name and setup version for the framework to recognize it. etc/di.xml handles dependency injection - plugins, preferences, and virtual types - not event observers.

Memory tip: Think "Events go in Events.xml" - the file name matches the concept exactly, unlike the other files which serve entirely different purposes.

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