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Frontend Performance Quiz Practice
Active Recall Drill Session
← Exit Session
Question 1 of 1
medium
Frontend Performance
What real DOM/reconciliation cost does virtualization avoid for a 10,000-item list?
A
No real cost is avoided, it's purely cosmetic
B
10,000 real DOM nodes existing simultaneously (most invisible), each subject to reconciliation on any list-touching update — virtualization bounds this to roughly the viewport's visible item count instead
C
It avoids the cost of fetching the data from a server
D
It only affects CSS rendering, not JavaScript reconciliation
Check Answer