Hot reload and hot restart in Flutter - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is hot reload in Flutter?

Hot reload updates the running app's code instantly without restarting the whole app. It preserves the app state and shows UI changes quickly.

beginner

What does hot restart do in Flutter?

Hot restart restarts the app completely, losing the current state but applying all code changes from the start.

intermediate

When should you use hot reload instead of hot restart?

Use hot reload to quickly see UI or logic changes without losing app state, like changing colors or layouts.

intermediate

When is hot restart necessary?

Hot restart is needed when you change app initialization code, global variables, or dependencies that hot reload can't update.

beginner

How do hot reload and hot restart improve Flutter development?

They speed up development by reducing wait times. Hot reload lets you see changes instantly, and hot restart resets the app quickly without a full rebuild.

What happens to the app state during a hot reload?

A The app state is reset

B The app state is preserved

C The app closes and restarts

D The app crashes

Hot reload updates code without losing the current app state.

Which action restarts the app and loses the current state?

A Hot reload

B Debug mode

C Hot restart

D Build APK

Hot restart restarts the app fully and resets the state.

Which change requires a hot restart instead of hot reload?

A Changing button color

B Changing layout padding

C Changing text in a widget

D Changing app initialization code

App initialization code changes need a full restart to take effect.

How does hot reload help developers?

A By instantly showing UI changes without losing state

B By closing the app

C By rebuilding the entire app

D By deleting app data

Hot reload quickly updates UI and logic while keeping app state.

Which Flutter feature speeds up development by reducing wait times?

A Hot reload and hot restart

B Full rebuild

C Manual code refresh

D App store deployment

Hot reload and hot restart let developers see changes quickly without full rebuilds.

Explain the difference between hot reload and hot restart in Flutter.

Think about what happens to the app state and how fast changes appear.

Describe scenarios when you would use hot reload versus hot restart during Flutter app development.

Consider what kind of code changes affect app state or initialization.