Phalcon uses Volt templating Engine. Volt provides Phalcon fast execution as it is very fast and designer friendly templating language written in C for PHP. Volt is inspired by Jinja and written by Armin Ronacher.
In Phalcon, the default template engine used is Volt. Volt is a fast and efficient templating engine designed specifically for Phalcon. It offers features such as template inheritance, auto-escaping, macros, and more, making it a powerful tool for building dynamic web applications with Phalcon framework. Therefore, the correct answer to the interview question would be “Volt.”