Multiple options vs single option UI

1. What is the best UI for multi selecting from a list?
2. What UI control allows user to select one or more options from a set of options?
3. Which is better radio buttons or checkboxes?
4. Which of these is used to select more than one out of many choices in UI?

What is the best UI for multi selecting from a list?

A multi-select pillbox is a suitable option if the user is familiar with the list's content and knows precisely what they're searching for. By searching or simply scrolling through the list, they can quickly locate what they are looking for.

What UI control allows user to select one or more options from a set of options?

Checkboxes allow the user to select one or more options from a set. It is usually best to present checkboxes in a vertical list.

Which is better radio buttons or checkboxes?

When should you use radio buttons or checkboxes? This relies entirely on what question you are asking. If you want your users to select multiple options, use checkboxes. If you want your users to select only one option, use radio buttons (or another alternative).

Which of these is used to select more than one out of many choices in UI?

Checkboxes allow a user to select multiple choices.