ICT CBP Q3 Periodical Test

Users mistype their email addresses. What's an effective solution?

• Allow registration despite email format errors.

• JavaScript validation for common mistakes.

• Provide the 'Confirm Email' field.

• Use HTML5 email input.

You're creating a registration form for a website. Users must provide a username, password, and email. What's the best approach to ensure validation? Use _______________ validation only.

• Combined HTML5 and JavaScript

• HTML5

• JavaScript

• Server-side and Client-side

In JavaScript, how do you access the value of an input element with the id 'username'?

• document.getElementByClass('username').value

• document.getElementById('username').value

• document.getElementByName('username').value

• document.querySelector('#username').value

The feedback form requires ratings, but some users submit it without rating. How do you enforce it?

• Allow without rating.

• Keep rating optional.

• Set default rating.

• Use JavaScript validation.

Users input invalid birthdates below age 13 in the registration form. How to ensure compliance?

• Allow registration regardless.

• Implement JavaScript age check.

• Prompt age confirmation.

• Use HTML5 date input.

Which JavaScript method is often used to validate if a checkbox is checked in a form?

• document.getElementById()

• document.querySelector()

• isCheckboxChecked()

• isChecked()

You need to ensure that users do not leave the username field empty. Which of the following JavaScript syntaxes would you use to validate if the username input is not null or undefined?

• if (username != null)

• if (username !== null)

• if (username == null)

• if (username === null)

Implementing form validation for sensitive data, what's a critical security measure?

• Disabling validation.

• Random number generator for validation.

• Using plain text storage.

• Validating client-side and server-side.

You're validating a textarea input field to ensure it contains only alphanumeric characters (a-z, A-Z, 0-9) and spaces. Which JavaScript code snippet provides the most effective validation?

• if (textarea === isNaN(textarea)) { /* Validation logic */ }

• if (textarea.includes('!@#$%^&*()')) { /* Validation logic */ }

• if (textarea.indexOf('!@#$%^&*()') === -1) { /* Validation logic */ }

• if (textarea.match(/^[a-zA-Z0-9 ]+$/)) { /* Validation logic */ }

You're validating a password input field to ensure it contains at least one special character (!@#$%^&*). Which JavaScript code snippet provides the most effective validation?

• if (password === isNaN(password)) { /* Validation logic */ }

• if (password.includes('!@#$%^&*')) { /* Validation logic */ }

• if (password.indexOf('!@#$%^&*') !== -1) { /* Validation logic */ }

• if (password.match(/[!@#$%^&*]/)) { /* Validation logic */ }