
Flutter Prague #7
Quiz
•
Computers
•
Professional Development
•
Practice Problem
•
Easy
Honza Bittner
Used 1+ times
FREE Resource
Enhance your content in a minute
8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens if you use setState() in StatefulWidget and don't change any data?
The build() function is not called
The build() function is called again even though the data has not changed
Compilation fails
Flutter optimizes it and skips the rebuild
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What causes a memory leak?
Failure to call super.dispose()
Too much setState()
Using the const widget
StatefulWidget without createState
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the validity of BuildContext in async operations in build()?
The context remains valid
It may be deprecated - it is dangerous to use
It is guaranteed by Flutter
Cannot be used in async functions
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is correct?
This code won’t compile
You cannot use factory in an abstract class
This is valid and will instantiate Circle
You must implement Shape with extends, not implements
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these applications IS NOT written in Flutter?
Můj T-Mobile
About You
Fakturoid
Discord
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Consider this Swift plugin and its Flutter representation. What is the output of getId()?
Consider this Swift plugin and its Flutter representation. What is the output of getId()?
1
2
error
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Consider the following class, what happens when calling getFirst ?
Null is returned
Exception is thrown
Compilation error
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