PURE.CSS provides concept of Pure Grid with two types of classes:

pure-g: A grid class
pure-u-*: A unit class

For a Pure.CSS interview question about Pure.CSS grids, the correct answer would be:

“Pure.CSS grids are a part of the Pure.CSS framework developed by Yahoo!. They provide a lightweight and responsive grid system for building web layouts. Pure.CSS grids are based on a 12-column grid system, allowing developers to easily create flexible and responsive layouts for their websites or web applications. These grids help in organizing content on web pages by providing a structured layout that adjusts gracefully to different screen sizes and devices, ensuring a consistent user experience across various platforms.”