What is Less in web development?

• A markup language
• A JavaScript library
• A CSS pre-processor
• A browser extension

What symbol is used to declare a variable in Less?

• $
• @
• #
• &

How do you compile a .less file into CSS?

• Run lessc filename.less
• Use sass filename.less
• Use compile filename.css
• Save as .css

Which of the following is a valid Less variable?

• $color: red;
• var color = red;
• @color: red;
• color = red;

In Less, what does nesting allow you to do?

• Add new elements
• Combine JS with CSS
• Write hierarchical selectors
• Import JavaScript files

How do you pass parameters to a mixin in Less?

• Using $param syntax
• With function()
• By defining variables inside mixin
• Using (@param) after mixin name

What are "guarded mixins" in Less?

• Mixins that are private
• Mixins with conditions
• Mixins without variables
• Mixins that extend CSS

Which of the following is a correct guard condition?

• when (@color = red)
• if @color == red
• guard(@color == red)
• when @color == red

How do you define multiple mixins with the same name but different conditions?

• Use overloaded mixins with when
• Use function()
• It's not allowed
• Use IDs

Which keyword is used to extend a selector in Less?

• inherit
• use
• @extend
• :extend

What does recursion in Less typically use?

• Loops
• JavaScript
• Self-invoking mixins
• Conditional imports

What is a common use of recursion in Less?

• Repeating animations
• Creating loops
• Importing files
• Nesting media queries

How do you implement a loop in Less using recursion?

• Use a for loop
• Use while syntax
• Use a mixin that calls itself with changed parameters
• Use the loop() function

How can you simulate a loop over a list in Less?

• With a while directive
• Using the each() function
• Using forEach()
• Using the do keyword

What does each(@list, .mixin(@value)) do?

• Assigns index to variable
• Applies .mixin to each value in @list
• Declares a mixin
• Throws a syntax error