Which system can be utilized to create a responsive layout in Liferay?

The Bootstrap grid system or custom media queries are integral for creating responsive layouts in Liferay. The Bootstrap grid system is designed to help developers create fluid and responsive designs through a series of predefined classes that adapt based on the screen size. This system utilizes a series of containers, rows, and columns to organize content, allowing for layouts that can easily scale and rearrange according to different devices, enhancing user experience.

Custom media queries complement the Bootstrap system by allowing developers to apply specific styles at various breakpoints, ensuring that the layout is tailored to diverse screen sizes and orientations. This flexibility is essential for ensuring that a website achieves responsiveness across a broad range of devices, from mobile phones to desktop computers.

Using only the CSS Grid system could effectively create a responsive layout but lacks the established utility classes and comprehensive support found in Bootstrap for quick implementations. Relying on HTML tables for layout is an outdated approach that does not provide the responsiveness or accessibility that modern web design standards require. Thus, leveraging the Bootstrap grid system or crafting custom media queries represents best practices in responsive web design within the Liferay platform.