15. Which PHP function is commonly used to validate email addresses submitted through a form?

What security measure helps prevent form spamming by distinguishing between human users and bots?

A). CAPTCHA

B). HTTPS

C). CSRF Token

D). Two-Factor Authentication

Which of the following HTTP methods is considered safe and idempotent, making it suitable for form submissions?

A). POST

B). GET

C). PUT

D). DELETE

Which of the following is NOT a common input validation technique for form data?

A). Regular Expressions

B). Whitelisting

C). Blacklisting

D). Tokenization

Which of the following is NOT a common security vulnerability associated with file uploads in web applications?

A). File Inclusion

B). File Upload Vulnerability

C). Path Traversal

D). Cross-Site Request Forgery

What is the primary purpose of form data validation in web applications?

A). Enhancing user experience

B). Preventing security vulnerabilities

C). Optimizing server performance

D). Improving search engine ranking

Which PHP function is commonly used to check if a form field is empty?

A). empty()

B). isset()

C). is_empty()

D). is_null()

What is the purpose of using HTTPS (HTTP Secure) in web applications?

A). Encrypting Data

B). Authenticating Users

C). Preventing XSS Attacks

D). Optimizing Page Load Speed

Which PHP function is used to generate a random CSRF token for form submissions?

A). bin2hex()

B). uniqid()

C). md5()

D). openssl_random_pseudo_bytes()

What is the purpose of input validation in web forms?

A). Ensuring Data Integrity

B). Enhancing User Experience

C). Preventing XSS Attacks

D). Enforcing Password Policies

What is the purpose of using prepared statements when interacting with databases in PHP?

A). Preventing SQL Injection

B). Improving Performance

C). Encrypting Data

D). Enforcing Data Integrity