Which type of malware displays advertisements, often as pop-ups?

• A. Adware
• B. Anti-Passback System
• C. Administrator
• D. AES

Answer: (A)

Ads appearing as pop-ups are the hallmark of adware, a type of malware whose primary purpose is to display advertisements on the infected system. Adware often comes bundled with free software, and it may monitor browsing activity to tailor ads, sometimes slowing performance and compromising privacy. The revenue goal behind adware explains why it floods your screen with ads and why it’s considered malicious.

The other terms don’t describe software that displays ads. An anti-passback system relates to access control and prevents credential reuse at entry points. An administrator is a user role with elevated permissions, not a malware category. AES is a widely used encryption standard, not a method for delivering advertisements.