What are CSS media queries used for?
A). Adding animations to elements
B). Applying styles based on the device characteristics
C). Creating image sliders
D). Defining CSS variables
Which CSS unit is commonly used in fluid grid layouts?
A). Pixels
B). Points
C). Percentages
D). Inches
Which jQuery method is used to change the source of an image dynamically?
A). .attr()
B). .html()
C). .css()
D). .val()
What does the .on('click', function) method in jQuery do?
A). Attaches a click event handler to selected elements
B). Hides selected elements
C). Changes the background color of selected elements
D). Resizes selected elements
What does the $('.menu-toggle').click(function() { $('.menu').slideToggle(); }); code do?
A). Hides the menu permanently
B). Toggles the visibility of the menu with a sliding effect
C). Fixes the menu position
D). Changes the menu color
How does display: none; help in responsive design?
A). It hides elements from the page completely
B). It makes elements visible only on small screens
C). It resizes elements
D). It changes the background color of elements
What does the following CSS media query do: @media (orientation: portrait) { ... }?
A). Applies styles when the device is in landscape mode
B). Applies styles when the device is in portrait mode
C). Applies styles regardless of orientation
D). Applies styles only to desktop devices
What is the purpose of using $(window).resize() in jQuery?
A). To detect when the window is resized and execute a function
B). To detect mouse clicks
C). To load new content
D). To change the CSS of an element
Why is it important to use $(document).ready(function() { ... }); in jQuery?
A). To ensure the DOM is fully loaded before executing scripts
B). To increase script execution speed
C). To prevent scripts from running
D). To hide content until the user interacts with the page
What is the primary purpose of responsive web design?
A). To make websites load faster
B). To make websites compatible with older browsers
C). To ensure websites render well on various devices and screen sizes
D). To reduce the amount of CSS required