How much space does an element take up within the document (on modern browsers) if it has "display: none" styling applied?

Which of the following is the correct syntax for using z-index?

How do you remove browser default margin and padding settings?

What selector is used to select all elements?

An attribute selector allows you to select an element with a specific attribute. To select a <input type="submit"> you would use:

Which of the following elements takes up the full width available, and has a line break before and after it?

Which is the newly introduced background properties in CSS3?

The ..................... specifies whether a border should be solid, dashed line, doted line, double line, groove etc.

Which is valid properties for flex-container? Check all that apply.

Internet Explorer uses ....................... property to create transparent images.

The ...................... property allows to specify how much space appear between the content of an element and it's border.