Are required indicators necessary for radio buttons?

1. What are the mandatory attributes for a radio button?
2. How do I keep my radio button checked?
3. How are radio buttons different from checkboxes This question is required?

What are the mandatory attributes for a radio button?

To group radio buttons they must all have the same name value. This allows only one to be selected at a time and applies required to the whole group.

How do I keep my radio button checked?

You can check a radio button by default by adding the checked HTML attribute to the <input> element. You can disable a radio button by adding the disabled HTML attribute to both the <label> and the <input> .

How are radio buttons different from checkboxes This question is required?

Checkboxes and radio buttons are elements for making selections. Checkboxes allow the user to choose items from a fixed number of alternatives, while radio buttons allow the user to choose exactly one item from a list of several predefined alternatives.