Q. What does the key prop do in React lists?

  • (A) It sets the list style
  • (B) It uniquely identifies elements for efficient updates
  • (C) It adds a password to components
  • (D) It defines accessibility
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✅ Correct Answer: (B) It uniquely identifies elements for efficient updates
Explanation: Keys help React identify which items have changed, been added, or removed.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 03:11 pm in React Js

Explanation by: Mr. Dubey
Keys help React identify which items have changed, been added, or removed.

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