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

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

A). onSubmit

B). onBlur

C). onChange

D). onFocus

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)

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 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 does the email rule validate in a form field?

A). Field value is a URL

B). Field value is an email address

C). Field value is a number

D). Field value is a date

How can you make a field optional in jQuery Validation Plugin?

A). By not including it in the rules section

B). By setting the required rule to false

C). By using the optional rule

D). By setting the field type to optional

Which option allows you to place error messages in a specific location?

A). errorPlacement

B). errorLocation

C). errorPosition

D). errorField

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

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 display all error messages in one place instead of next to each field?

A). Use the errorSummary option

B). Use the errorLabel option

C). Use the errorContainer option

D). Use the errorList option