Is that CAPTCHA you just encountered real? Find out how fake CAPTCHAs are installing hidden malware and how to stay safe.

I pushed eight free AI chatbots to their limits to find the best AI chatbots of 2026. To explore our top picks, check out ZDNET's chatbot-by-chatbot guide.

Overview: Strong knowledge of data structures and recognizing common patterns makes complex coding questions easier and faster to solve.Thinking out loud during ...