React Native Professional Standards & Competencies 3

Question 1

A React Native app is collecting user location data. Which professional practice is legally and ethically required in the US?

Accepted Answer

Collect location only when the app is active and disclose usage clearly in a privacy policy

Answer

US regulations and both platform guidelines require clear disclosure and appropriate permissions when collecting sensitive data like location.

Question 2

When should a React Native developer use the `useCallback` hook?

Accepted Answer

When passing a callback to a memoized child component to prevent unnecessary re-renders

Answer

`useCallback` is most valuable when its stable reference prevents a memoized child (`React.memo`) from re-rendering unnecessarily.

Question 3

A new React Native release contains a security patch. What is the professional course of action?

Accepted Answer

Evaluate the patch's relevance to your app, test the upgrade in a branch, and ship it within a reasonable risk window

Answer

Evaluating relevance and testing before shipping balances security urgency with production stability.

Question 4

Which technique demonstrates professional accessibility (a11y) implementation in React Native?

Accepted Answer

Using `accessibilityLabel`, `accessibilityRole`, and testing with TalkBack and VoiceOver on real devices

Answer

Meaningful labels, semantic roles, and real-device screen reader testing together produce genuinely accessible experiences.

Question 5

A team discovers that a third-party React Native library has not been maintained for two years. The professional response is to:

Accepted Answer

Assess active usage, check for known CVEs, evaluate maintained alternatives, and plan migration if risk is high

Answer

A risk assessment drives the right response — immediate migration may be unnecessary if the library is low-risk and stable.

React Native Practice Test