Mastering CSS Selectors by ID

What does a CSS selector define?

• The style of the webpage

• Which HTML elements a rule applies to

• The size of the text

• The background color of the page

What makes selecting by ID unique compared to class and tag?

• It selects multiple elements

• It can select any HTML element

• It applies to a single specific HTML element

• It changes the content of the element

How do you select an element by its ID in CSS?

• Using a dot followed by the ID name

• Using the class attribute

• Using the element's tag name

• Using a hashtag followed by the ID name

What is a requirement for an element's ID?

• It should not be specific

• It can be reused across elements

• It must be unique on the webpage

• It must be a number

Can ID names start with a number?

• Yes, but it's not recommended

• Only if followed by a letter

• No, never

• Yes, always

What is the correct way to fix invalid ID names?

• Add a letter at the start

• Remove any numbers

• Replace spaces with dashes

• All of the above

What happens when there are style conflicts between ID, class, and tag selectors?

• The class selector takes precedence

• The tag selector overrides others

• The ID selector has the highest precedence

• All styles are ignored

What does the ID selector override?

• Only the class selector

• None, it's equal to class and tag selectors

• Only the tag selector

• Both class and tag selectors

What is the effect of adding an ID selector to an element with existing class and tag styles?

• It adds to the existing styles without overriding

• It only overrides tag styles

• It overrides both the class and tag styles

• It is ignored if class styles exist

How can conflicts between different types of selectors be resolved?

• By removing all styles

• By using only tag selectors

• By giving ID selectors the highest priority

• By writing more specific class selectors