Certified Information Systems Auditor (CISA) — Question 445

Which of the following metrics is the BEST indicator of the performance of a web application?

Answer options

• A. Server thread count
• B. Server uptime
• C. HTTP server error rate
• D. Average response time

Correct answer: D

Explanation

Average response time is the best indicator of web application performance because it directly reflects how quickly users receive responses from the server. While server thread count, uptime, and HTTP server error rate are important, they do not give a direct measure of user experience in terms of responsiveness.