React Native Professional Standards & Competencies 4

Question 1

A React Native app crashes in production but not in development. What is the most professional first step?

Accepted Answer

Capture and analyze the crash report from a service like Sentry or Firebase Crashlytics before making any code change

Answer

Crash reports with stack traces and device context identify the real root cause before any code change is made.

Question 2

Which practice best demonstrates professional version control discipline in a React Native project?

Accepted Answer

Committing small, logically atomic changes with descriptive messages that explain why the change was made

Answer

Small atomic commits with clear 'why' messages make code review, bisecting, and reverting straightforward.

Question 3

A product manager asks for an urgent feature that skips QA. The professional developer response is to:

Accepted Answer

Explain the risks of skipping QA, propose a minimal smoke-test plan, and document the accepted risk in writing

Answer

Surfacing risk, proposing a pragmatic minimum, and documenting accepted risk are professional behaviors that protect the team and product.

Question 4

What does the React Native New Architecture's JSI (JavaScript Interface) primarily improve over the old bridge?

Accepted Answer

Direct synchronous communication between JS and native code, eliminating async serialization overhead

Answer

JSI replaces the asynchronous JSON bridge with direct C++ object references, enabling synchronous native calls and better performance.

Question 5

Which behavior reflects professional handling of a disagreement with a team member's architectural decision in code review?

Accepted Answer

Raise specific technical concerns with evidence or alternatives, discuss openly, and accept the team's consensus

Answer

Evidence-based technical discussion followed by team consensus respects both technical quality and collaborative decision-making.

React Native Practice Test