Question 310
At Brookside Manufacturing, the plant software team is implementing a work-order system upgrade under requirements for planned downtime and production traceability. After the proposed change, the release reviewer requires evidence for: A code app renders 15,000 records in a single React list and scroll performance collapses. Which result BEST proves the intended fix is effective?
Explanation
Correct Answer
Scrolling remains responsive and no extra 15,000-row DOM nodes are created at once. This directly tests whether the reported failure has been corrected: A code app renders 15,000 records in a single React list and scroll performance collapses. The intended action was Use virtualized rendering and server-side paging for large lists while keeping stable row keys. The observed Brookside Manufacturing outcome is stronger evidence than a completed ticket or a saved configuration alone.
Incorrect Answers
A test failure can be traced to a specific request without sending personally identifying values to telemetry. Such evidence would validate a different change: An incident leaves no trace of which code-app action failed because the UI only shows a generic error toast. It follows the separate remedy Instrument Application Insights with correlation IDs, exception events and sanitized diagnostic dimensions. The Brookside Manufacturing scenario instead reports A code app renders 15,000 records in a single React list and scroll performance collapses. The decisive observation must be: Scrolling remains responsive and no extra 15,000-row DOM nodes are created at once.
Required assets load and CSP violation logs show no unexpected third-party requests during testing. Such evidence would validate a different change: A hosted Power Apps code app loads fonts and scripts from unapproved origins and its Content Security Policy blocks rendering. It follows the separate remedy Configure a restrictive but sufficient CSP that permits approved resources while excluding unsafe wildcard sources. The Brookside Manufacturing scenario instead reports A code app renders 15,000 records in a single React list and scroll performance collapses. The decisive observation must be: Scrolling remains responsive and no extra 15,000-row DOM nodes are created at once.
Application startup uses fewer requests and avoids rate-limit spikes while preserving fresh essential data. Such evidence would validate a different change: A code app opens ten parallel metadata requests on every launch and routinely breaches connection or service limits. It follows the separate remedy Combine safe metadata reads, cache stable schema information and bound request concurrency. The Brookside Manufacturing scenario instead reports A code app renders 15,000 records in a single React list and scroll performance collapses. The decisive observation must be: Scrolling remains responsive and no extra 15,000-row DOM nodes are created at once.