कैप्चा (CAPTCHA) का उपयोग निम्नलिखित में से किस खतरे से सुरक्षा और बचाव प्रदान करने के लिए किया जाता है?

Which of the following statements is/are true? [1] SMTP is used to receive emails from a server, while IMAP is used to send emails. [2] HTTP and HTTPS are protocols used for accessing websites, but HTTPS provides a secure, encrypted connection.

Match the type of hacker in Column A with their correct description in Column B: Column A (Type of Hacker): A) Black Hat Hacker B) Gray Hat Hacker C) Green Hat Hacker D) Blue Hat Hacker Column B (Description): 1) Eager to learn hacking, typically an amateur 2) Hacks with malicious intent; illegal 3) Invited to find bugs before a product launches or attacks out of revenge 4) Hacks without permission, but not necessarily with malicious intent