Dart

20 Minutes

10 Questions

This test is designed to assess a student's knowledge of the basics of technology and the Dart programming language. It will cover topics such as data types, variables, functions, classes, and other fundamental concepts. The test will also include questions about the syntax and semantics of Dart code. The goal is to evaluate a student's understanding of the fundamentals of technology and Dart programming.

Example Question:

Multiple-Choice

Consider the two Dart code snippets below:

Code Snippet A

void fetchData() {
 for (int i = 0; i < 1e8; ++i) {}
 print('Data fetched');
}

void main() {
 print('Fetching data...');
 fetchData();
 print('Done.');
}

Code Snippet B

Future<void> fetchData() async {
 await Future.delayed(Duration(seconds: 2));
 print('Data fetched');
}


void main() async {
 print('Fetching data...');
 await fetchData();
 print('Done.');
}

Which of the following statements is most accurate?

Answers

1. Both Code Snippet A and Code Snippet B will have the same impact on the UI thread.

2. Code Snippet A will block the main thread, leading to poor app performance, while Code Snippet B will not.

3. Code Snippet A will execute faster than Code Snippet B.

4. Code Snippet B will block the main thread, while Code Snippet A will not.