0 — Test 611

Correct Answer: B. Network throttling
Explanation: Throttling helps reveal problems that only appear on slow mobile networks.

Correct Answer: B. WebP
Explanation: AVIF compresses even better, but its support arrived later in some browsers.

Correct Answer: B. WOFF2
Explanation: EOT was used only by Internet Explorer.

Correct Answer: B. Application
Explanation: Firefox shows the same information in its Storage panel.

Correct Answer: A. The DOM element currently selected in the Elements panel
Explanation: $1 refers to the previously selected element, and so on. ALSO KNOW (related points): • Which DevTools panel shows every HTTP request, with its status, size, and timing? → Network • Which tool built into Chrome DevTools audits performance, accessibility, best practices, and SEO? → Lighthouse • Where can you see uncaught JavaScript errors from a page? → In the DevTools Console • Which DevTools panel shows cookies, localStorage, IndexedDB, and service workers in Chrome? → Application • Which DevTools panel lets you set breakpoints and step through JavaScript? → Sources (called Debugger in Firefox) • Which DevTools panel records frame rates, scripting time, and layout work to find performance bottlenecks? → Performance • What does typing view-source:https://example.com into the address bar do? → It shows the raw HTML source of that page

Correct Answer: A. Sources (called Debugger in Firefox)
Explanation: You can also pause on exceptions and use conditional breakpoints.

Correct Answer: C. Performance
Explanation: The Memory panel takes heap snapshots to find memory leaks.

Correct Answer: D. It shows the raw HTML source of that page
Explanation: This is the same as pressing Ctrl + U on that page.

Correct Answer: C. Blink
Explanation: Only iOS imposes the WebKit requirement. On Android, Chrome uses Blink.

Correct Answer: C. Chromium (Blink)
Explanation: Samsung Internet is preinstalled on Samsung Galaxy devices.