Which rule ensures that a field must not be left empty?
A). minlength
B). maxlength
C). required
D). email
What is the default event that triggers form validation in the jQuery Validation Plugin?
A). onSubmit
B). onBlur
C). onChange
D). onFocus
What does the equalTo rule validate?
A). Field value must be unique
B). Field value must be a number
C). Field value must match another field
D). Field value must be an email address
How do you specify a custom error message for a validation rule?
A). error: 'Message'
B). message: 'Message'
C). msg: 'Message'
D). messages: { fieldName: 'Message' }
What is the correct way to specify validation rules in the jQuery Validation Plugin?
A). rules: { fieldName: rule }
B). fields: { rule: fieldName }
C). options: { fieldName: rule }
D). validate: { rule: fieldName }
Which jQuery plugin is commonly used for form validation?
A). jQuery UI
B). jQuery Mobile
C). jQuery Validation Plugin
D). jQuery Animate
What is the purpose of the remote rule in jQuery Validation Plugin?
A). To check field value uniqueness on the server
B). To validate field value against a regex
C). To prevent default action
D). To handle field validation on the client-side
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()
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
How can you prevent a form from being submitted if it is invalid?
A). By using the onsubmit option
B). By using the preventSubmit option
C). By using the blockSubmit option
D). By using the submitHandler option