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

1. What is the purpose of the 'spread' operator ('...') in Dart?

Handling exceptions

Defining constants

Creating objects

Flattening iterable elements

2. Which Dart data type is used for representing integers?

int

integer

number

numeric

3. In Dart, what is the 'call()' method used for?

Handling exceptions

Defining constants

Implementing function invocation

Creating objects

4. In Dart, what is the purpose of the 'is' keyword?

Defining variables

Checking the type of an object

Creating loops

Importing libraries

5. What is the purpose of the 'assert' statement in Dart?

To ensure that a given expression is true during development and testing

To define constants in Dart programming

To create conditional statements in Dart

To handle exceptions in Dart applications

6. How is error handling typically done in Dart?

Using try-catch blocks

Using if-else statements

Using switch-case statements

Using assert statements

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

Terminating a loop

Exiting a function

Handling exceptions

Creating objects

8. Which Dart operator is used for null-aware assignment?

9. How do you declare a variable in Dart?

var variableName;

int variableName;

variable variableName;

declare variableName;

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

List

Set

Map

Queue

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

Handling exceptions

Managing asynchronous operations

Defining constants

Implementing synchronous generators

12. What is the purpose of the 'late' keyword in Dart?

Deferring variable initialization

Creating constants

Handling exceptions

Accessing class members

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

Creating constant variables

Defining constants

Handling exceptions

Creating objects based on specific conditions

14. What is the purpose of the 'const constructor' in Dart?

Creating constant variables

Defining constants

Handling exceptions

Accessing class members

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

Using 'static' keyword

Using 'singleton' keyword

Using 'final' keyword

Using 'const' keyword

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

Creating objects

Handling exceptions

Re-throwing the current exception

Defining constants

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

Using 'try-catch' blocks

Using 'onError' handlers

Using 'finally' blocks

Using 'catchError' methods

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

Web development

Mobile app development

Data analysis

Game development

19. In Dart, what is the difference between 'is' and 'as' when working with types?

They are interchangeable

'is' checks type, 'as' casts to a type

'as' checks type, 'is' casts to a type

'is' and 'as' are used for entirely different purposes

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

Define asynchronous functions

Declare constants

Create static methods

Specify variable types

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

Ensuring type safety

Allowing more flexible type assignments

Handling exceptions

Defining constants

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

Creating objects

Checking conditions at runtime

Defining constants

Handling exceptions

23. In Dart, how do you define an abstract class?

Using 'abstract' keyword before the class declaration

Using 'interface' keyword before the class declaration

Adding 'abstract' keyword to the class constructor

Including 'final' keyword in the class body

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 'cascade' operator ('..') in Dart?

Performing arithmetic operations

Chaining method calls

Accessing class variables

Defining constants

26. In Dart, how do you import a library?

using

import

include

require

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

Isolates

Threads

Futures

Promises

28. In Dart, what is the purpose of the 'zoneCallback' function?

Handling exceptions

Managing asynchronous operations

Defining constants

Creating objects

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

Extending class functionalities

Defining constants

Creating objects

Handling exceptions

30. Which Dart keyword is used to implement inheritance?

extends

implements

inherits

inheritsFrom

31. 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

32. What is the primary use of the 'print' function in Dart?

To output text to the console

To declare variables in Dart

To create loops in Dart programming

To handle exceptions in Dart

33. What is the purpose of the 'never' type in Dart?

Defining variables

Handling exceptions

Denoting functions that never return

Creating objects

34. What is the purpose of the 'Future' class in Dart?

To represent a value or error that might be available in the future

To define constants in Dart programming

To create parallel execution in Dart applications

To handle UI interactions in Dart

35. What is the purpose of the 'finally' block in a try-catch statement in Dart?

Defining constants

Handling exceptions

Executing code regardless of exceptions

Creating objects

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

Implementing mixins

Creating objects

Defining constants

Handling exceptions

37. 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

38. How is the 'noSuchMethod' method used in Dart?

Handling exceptions

Defining constants

Implementing dynamic method invocation

Creating objects

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

Creating objects

Handling exceptions

Re-throwing the current exception

Defining constants

40. 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

Dart MCQ Test 2