Explain how Magento’s fallback mechanism works for themes.

Explain how Magento’s fallback mechanism works for themes.

Answer: Magento’s fallback mechanism for themes allows the system to locate the necessary files in a hierarchical manner. When a request for a resource (like a template or layout file) is made, Magento first checks the custom theme specified in the configuration. If the file is not found there, it falls back to the base theme defined in the Magento installation.

The fallback order is as follows:

1. Custom Theme: The system checks the active custom theme.
2. Base Theme: If the resource isn’t found in the custom theme, it searches the base theme provided by Magento.

This approach enables developers to extend and override default functionality while ensuring that missing resources can automatically fall back to the base resources, promoting reusability and customization.

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