The video tutorial introduces CSS selectors, explaining their five categories: simple, combinator, pseudo-class, pseudo-element, and attribute selectors. It then covers CSS color formats like RGB, HEX, and RGBA, with practical demonstrations in VS Code. The tutorial also explains the use of class and ID selectors for styling HTML elements, highlighting the differences between them. Finally, it discusses the universal selector and concludes the lecture.

Which of the following is NOT a category of CSS selectors?

• Simple selectors

• Combinator selectors

• Pseudo-class selectors

• Color selectors

What are the most commonly used color formats in CSS?

• RGB, RGBA, and HEX

• HSL and CMYK

• HEX and CMYK

• RGB and HSL

In CSS, what does the simple selector apply to?

• All elements of a specified type

• Elements with a specific ID

• Only the first element of a type

• Elements with a specific class

How can you apply different styles to multiple elements using CSS?

• By using the ID selector

• By using the class selector

• By using the inline style

• By using the universal selector

What is the main difference between an ID and a class selector in CSS?

• An ID is unique to a page, while a class can be used multiple times

• Both ID and class can be used multiple times

• An ID can be used multiple times, while a class is unique

• A class is unique to a page, while an ID can be used multiple times

What is the purpose of the universal selector in CSS?

• To apply styles to all elements on a page

• To apply styles to the first element of a type

• To select elements with a specific class

• To select elements with a specific ID

Which CSS selector would you use to remove white spaces from a page?

• Universal selector

• Simple selector

• Class selector

• ID selector