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FC0-U71 Practice Question: A web developer wants to identify why a web page…
A web developer wants to identify why a web page is loading slowly. Which built-in browser tool is most appropriate to analyze network requests?
⚠ Common exam trap
Many exam-takers confuse the general-purpose 'Developer Tools' with other browser utilities that have 'manager' in their name, assuming any 'manager' can handle performance analysis, when only Developer Tools provides the network waterfall and timing breakdowns.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Developer Tools
Developer Tools (F12) include a Network tab that captures all HTTP/HTTPS requests made by the page, showing timing details (DNS lookup, TCP handshake, TLS negotiation, time to first byte, content download) and response sizes. This allows the developer to pinpoint slow resources, such as large images, unoptimized scripts, or server delays, making it the correct tool for analyzing network performance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Password manager
Why it's wrong here
A password manager stores and autofills credentials; it captures no request timing, headers or payload data, so it cannot reveal which resources delay page load. It is tempting because browsers bundle it alongside developer tools, and it would be the right choice when a developer needs to save, retrieve or autofill login credentials securely.
- ✓
Developer Tools
Why this is correct
Developer Tools includes a Network panel that records every HTTP request with timing, size and status, letting the developer pinpoint slow resources. This directly satisfies the need to analyse network requests, which no other built-in browser feature provides.
- ✗
Download manager
Why it's wrong here
A download manager only queues and resumes file transfers; it cannot inspect per-request timing, headers or status codes, so it cannot reveal which resource delays page rendering. It is tempting because it does handle network traffic, and it would be the right tool for scheduling large downloads or resuming interrupted transfers.
- ✗
Bookmark manager
Why it's wrong here
A bookmark manager stores and organises saved URLs; it records no request timing, headers or payload data, so it cannot reveal which resources delay page load. It is tempting because it does catalogue page addresses, and it would be the right tool for syncing or tidying frequently visited sites — not for diagnosing network performance.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This FC0-U71 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the FC0-U71 exam.