Super Dart Test - 62+ MCQs: Dart test: Assess Your Dart Programming Knowledge with Challenging Questions and Answers

1. What is the purpose of the 'break' statement in Dart?

Terminating a loop

Exiting a function

Handling exceptions

Creating objects

2. What is the purpose of the 'covariant' keyword in Dart?

Ensuring type safety

Allowing more flexible type assignments

Handling exceptions

Defining constants

3. What is the primary use of Dart programming language?

Web development

Mobile app development

Data analysis

Game development

4. What is the purpose of the 'sync*' function in Dart?

Handling exceptions

Managing asynchronous operations

Defining constants

Implementing synchronous generators

5. How is error handling typically done in Dart?

Using try-catch blocks

Using if-else statements

Using switch-case statements

Using assert statements

6. In Dart, how do you handle asynchronous errors in a 'Future'?

Using 'try-catch' blocks

Using 'onError' handlers

Using 'finally' blocks

Using 'catchError' methods

7. In Dart, what is the default value of an uninitialized variable?

null

undefined

false

8. What is the purpose of the 'factory constructor' in Dart?

Creating constant variables

Defining constants

Handling exceptions

Creating objects based on specific conditions

9. What is the purpose of the 'rethrow' expression in Dart?

Creating objects

Handling exceptions

Re-throwing the current exception

Defining constants

10. Which keyword is used to define a constant variable in Dart?

final

const

static

var

11. What is the purpose of the 'super' keyword in Dart?

Accessing superclass members

Declaring variables

Creating objects

Handling exceptions

12. In Dart, how do you perform conditional property access safely?

Using 'try-catch' blocks

Using '?. operator'

Using 'else' statements

Using 'unsafe' keyword

13. What is the purpose of the 'onTimeout' method in Dart's 'Future' class?

Handling exceptions

Managing asynchronous operations

Defining constants

Specifying actions when a future times out

14. In Dart, what is the 'call' constructor used for?

Handling exceptions

Defining constants

Implementing function invocation

Creating objects

15. What is the purpose of the 'async' keyword in Dart?

Define asynchronous functions

Declare constants

Create static methods

Specify variable types

16. What is the purpose of the 'const' keyword in Dart?

Defining constant variables

Creating classes

Handling exceptions

Accessing class members

17. Which Dart concept is used for managing code execution in parallel?

Isolates

Threads

Futures

Promises

18. What is the purpose of the 'assert' keyword in Dart?

Creating objects

Checking conditions at runtime

Defining constants

Handling exceptions

19. What is the purpose of the 'extension' keyword in Dart?

Extending class functionalities

Defining constants

Creating objects

Handling exceptions

20. What is the purpose of the 'with' keyword in Dart?

Implementing mixins

Creating objects

Defining constants

Handling exceptions

21. In Dart, how do you perform a conditional import?

Using 'if' statements

Using 'else' statements

Using 'import if' syntax

Using 'deferred' keyword

22. Which Dart keyword is used to implement inheritance?

extends

implements

inherits

inheritsFrom

23. In Dart, how do you implement a singleton pattern?

Using 'static' keyword

Using 'singleton' keyword

Using 'final' keyword

Using 'const' keyword

24. What is the purpose of the 'new' keyword in Dart?

Creating instances of classes

Defining constants

Handling exceptions

Accessing class members

25. What is the purpose of the 'typedef' keyword in Dart?

Defining custom types

Creating variables

Importing libraries

Handling exceptions

26. Which collection type in Dart does not allow duplicate elements?

List

Set

Map

Queue

27. Explain the concept of mixins in Dart.

A way to reuse a class's code in multiple class hierarchies

A technique for optimizing Dart code execution

A type of loop construct in Dart programming

A mechanism for handling exceptions in Dart

28. What is the main purpose of the 'async' and 'await' keywords in Dart?

To handle asynchronous operations and improve code readability

To declare variables with asynchronous behavior

To create multi-threaded applications in Dart

To define generic types in Dart programming

29. What is the purpose of the 'if' statement in Dart?

To conditionally execute code based on a boolean expression

To create a loop in Dart programming

To declare a function in Dart

To handle asynchronous operations in Dart

30. In Dart, what is the 'isolate'?

A type of loop

A type of function

A separate memory execution unit

A type of data structure

Dart MCQ Test 3