Code obfuscation and optimization in Flutter - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable code obfuscation in Flutter build command.

Flutter

flutter build apk --[1]

Drag options to blanks, or click blank then click option'

Arelease

Bdebug

Cprofile

Dobfuscate

Attempts:

3 left

💡 Hint

Common Mistakes

Using --debug instead of --obfuscate

Forgetting to add --obfuscate flag

Use --obfuscate to enable code obfuscation during Flutter build.

2fill in blank

medium

Complete the code to specify the directory for storing debug symbols during obfuscation.

Flutter

flutter build apk --obfuscate --split-debug-info=[1]

Drag options to blanks, or click blank then click option'

Abuild/debug-info

Blib/src

Candroid/app

Dassets/images

Attempts:

3 left

💡 Hint

Common Mistakes

Using source code folders like lib/src

Using unrelated folders like assets/images

The --split-debug-info flag requires a directory path to save debug symbols for stack traces.

3fill in blank

hard

Fix the error in the Flutter build command to properly optimize the app for release.

Flutter

flutter build apk --[1] --obfuscate

Drag options to blanks, or click blank then click option'

Adebug

Bprofile

Crelease

Dtest

Attempts:

3 left

💡 Hint

Common Mistakes

Using debug mode with obfuscation

Using profile mode instead of release

The --release flag builds the app optimized for production use.

4fill in blank

hard

Fill both blanks to create a Dart function that returns the optimized square of a number using a concise syntax.

Flutter

int square(int x) => x [1] [2];

Drag options to blanks, or click blank then click option'

A*

B+

C-

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition or subtraction instead of multiplication

Using division operator

Multiplying x by itself returns the square.

5fill in blank

hard

Fill all three blanks to create a Dart map comprehension that filters and squares even numbers from a list.

Flutter

{ [1]: [2] * [2] for (var [3] in numbers if [2] % 2 == 0) }

Drag options to blanks, or click blank then click option'

Anum

Bx

Di

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently

Using a variable not declared in the loop

The variable x is used for keys and values, filtering even numbers and squaring them.