What is the main building block of Flutter UI?
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Question 1 of 5
Flutter quiz
Check Flutter fundamentals around widgets, state, layouts, performance, and builds.
Mobile · About 3 minutes
Flutter quiz questions and answers
Review all 5 questions at your own pace. Open each answer to see the correct response and a concise explanation of the concept.
Topics covered
- Widgets
- Layouts
- State
- Navigation
- Dart
What is the main building block of Flutter UI?
Correct answer
Widget
Flutter UI is composed from widgets, including layout, text, images, and interaction elements.
Which language is Flutter primarily written with?
Correct answer
Dart
Flutter apps are built with Dart.
What does hot reload help developers do?
Correct answer
See UI changes quickly without a full restart
Hot reload speeds up development by injecting code changes into the running app.
Which widget arranges children vertically?
Correct answer
Column
Column lays out child widgets from top to bottom.
What should you optimize when a Flutter list scrolls slowly?
Correct answer
Use lazy list builders and reduce expensive rebuilds
Efficient builders and controlled rebuilds keep long lists smooth.
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