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

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

Creating instances of classes

Defining constants

Handling exceptions

Accessing class members

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

Creating objects

Handling exceptions

Re-throwing the current exception

Defining constants

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

using

import

include

require

4. What is the purpose of the 'match' expression in Dart?

Defining constants

Handling exceptions

Implementing pattern matching

Creating objects

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

List

Set

Map

Queue

6. In Dart, how do you declare a multi-line string?

multi('...')

multiline('...')

'''...'''

string('...')

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

Implementing mixins

Creating objects

Defining constants

Handling exceptions

8. In Dart, what is the 'main()' function used for?

Handling exceptions

Starting the execution of the program

Defining classes

Printing output to the console

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

Creating objects

Handling exceptions

Re-throwing the current exception

Defining constants

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

A type of loop

A type of function

A separate memory execution unit

A type of data structure

11. Which Dart keyword is used to implement inheritance?

extends

implements

inherits

inheritsFrom

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

Define asynchronous functions

Declare constants

Create static methods

Specify variable types

13. What is the purpose of the 'cascade' operator ('..') in Dart?

Performing arithmetic operations

Chaining method calls

Accessing class variables

Defining constants

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

15. 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

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

Handling exceptions

Defining constants

Implementing function invocation

Creating objects

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

Creating constant variables

Defining constants

Handling exceptions

Accessing class members

18. 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

19. What is the purpose of the 'Sync' in Dart's 'Future.sync'?

Handling exceptions

Managing asynchronous operations

Defining constants

Ensuring synchronous execution of the future

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

null

undefined

false

Dart MCQ Test 4