How can you prevent a form from being submitted if it is invalid?

Which rule ensures that a field must not be left empty?

A). minlength

B). maxlength

C). required

D). email

How do you apply validation to only specific fields in a form?

A). By using the field selector

B). By using the field attribute

C). By specifying fields in the validate method

D). By using CSS classes

What is the primary purpose of form validation?

A). Enhance visual design

B). Secure data submission

C). Improve page load speed

D). Reduce server requests

What is the purpose of the highlight option in jQuery Validation Plugin?

A). To change the color of valid fields

B). To change the color of invalid fields

C). To add a CSS class to valid fields

D). To add a CSS class to invalid fields

Which method prevents the default form submission if validation fails?

A). submitHandler: function(form)

B). beforeSubmit: function(form)

C). onError: function(form)

D). preventSubmit: function(form)

Which jQuery plugin is commonly used for form validation?

A). jQuery UI

B). jQuery Mobile

C). jQuery Validation Plugin

D). jQuery Animate

How do you include the jQuery Validation Plugin in your HTML file?

A). Using a script tag

B). Using a link tag

C). Using an iframe

D). Using an embed tag

How do you validate a field that should only contain numbers?

A). Use the number rule

B). Use the digits rule

C). Use the numeric rule

D). Use the integer rule

What is the default event that triggers form validation in the jQuery Validation Plugin?

A). onSubmit

B). onBlur

C). onChange

D). onFocus

How can you add a custom validation method using the jQuery Validation Plugin?

A). $.validator.custom()

B). $.validator.addMethod()

C). $.validator.newMethod()

D). $.validator.create()