Flutter Prague #7

Flutter Prague #7

Professional Development

8 Qs

quiz-placeholder

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Flutter Prague #7

Flutter Prague #7

Assessment

Quiz

Computers

Professional Development

Practice Problem

Easy

Created by

Honza Bittner

Used 1+ times

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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

Media Image

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

Media Image

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

Media Image

Consider the following class, what happens when calling getFirst ?

Null is returned

Exception is thrown

Compilation error

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