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

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 primary purpose of form validation?

A). Enhance visual design

B). Secure data submission

C). Improve page load speed

D). Reduce server requests

Which jQuery plugin is commonly used for form validation?

A). jQuery UI

B). jQuery Mobile

C). jQuery Validation Plugin

D). jQuery Animate

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

A). errorPlacement

B). errorLocation

C). errorPosition

D). errorField

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)

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

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

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

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 }

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