Question: The WCAG are broadly divided into four principles. Which of the following is NOT one of those principles?
- Operable
- Perceivable
- Comprehensible
- Understandable
Explanation
WCAG groups accessibility guidance under four formal principles: Perceivable, Operable, Understandable, and Robust. The unmatched term is not one of the standardized principle names used in that framework. HubSpot’s accessibility documentation points developers to WCAG as the standard for accessible web content and emphasizes using its defined requirements when building templates, modules, and interactions. Because the principle names are fixed terms, only those four belong to the official model. HubSpot Developers+1
Why the other options are incorrect
Operable is one of the four official WCAG principles and covers whether users can interact with navigation and controls. HubSpot Developers+1
Perceivable is one of the four official WCAG principles and covers whether content can be detected through sight, hearing, or assistive technology. HubSpot Developers+1
Understandable is one of the four official WCAG principles and covers clarity, predictability, and meaning in content and interface behavior. HubSpot Developers+1
Source for verification
HubSpot Developer Documentation: Accessibility — HubSpot Developers
HubSpot: Web accessibility overview — HubSpot Blog
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