Preparing for Dart & Flutter Interviews in 2025?

 

While working on my own interview preparation, I hand-picked some key Dart questions that I believe could be really helpful for anyone gearing up in 2025. It’s a small effort from me to share something valuable with the community. I’ve compiled these into a document (DOCX) that’s ready to go! Hit like and drop a “thank you” in the comments if you find this helpful.

Wishing you all the best for your interviews! 😊

Basics of Dart

1.       What is Dart and where is it used?

2.       How do you declare a variable in Dart?

3.       What is the difference between var, final, and const in Dart?

4.       What are data types available in Dart?

5.       How do you write a comment in Dart?

6.       What is the main() function in Dart?

7.       What is type inference in Dart?

8.       How does Dart handle type safety?

9.       What is string interpolation in Dart?

10.   How do you create multi-line strings in Dart?

Control Flow and Loops

1.       What are the control flow statements in Dart?

2.       How do if and else work in Dart?

3.       What types of loops does Dart support?

4.       What is the difference between for and for-in loop?

5.       What is a while loop and when to use it?

6.       What is a do-while loop in Dart?

7.       How does break and continue work?

Functions in Dart

1.       How do you define a function in Dart?

2.       What is an arrow function in Dart?

3.       What are optional positional parameters?

4.       What are named parameters?

5.       What is the use of default parameters?

6.       What is a higher-order function?

7.       What is an anonymous function?

8.       What is a recursive function in Dart?

9.       What is typedef and how is it used?

Object Oriented Programming (OOP)

1.       How do you define a class in Dart?

2.       What are constructors in Dart?

3.       What is a named constructor?

4.       What is inheritance in Dart?

5.       How do you implement interfaces in Dart?

6.       What is the use of abstract classes?

7.       What is a mixin and how is it used?

8.       What is an enum and how do you use it?

9.       What are getters and setters?

10.   How do you override a method in Dart?

Advanced Dart Topics

11.   What is null safety in Dart?

12.   What is the difference between ? and ! in Dart?

13.   What does the ?? and ??= operator do?

14.   What is the use of the cascade operator (..)?

15.   What are extension methods in Dart?

16.   What is a factory constructor?

17.   What is a static method and how is it used?

18.   How does Dart manage memory?

19.   What is late keyword used for?

20.   What is const constructor?

Collections and Generics

21.   What is a List in Dart?

22.   What is the difference between List and Set?

23.   How does Map work in Dart?

24.   What are collection if and collection for?

25.   What are spread operators in Dart?

26.   How do you use generics in Dart?

27.   What is a generic function?

Asynchronous Programming

28.   What is a Future in Dart?

29.   What is async and await in Dart?

30.   What is a Stream in Dart?

31.   How do you handle errors in Futures?

32.   How do you listen to Stream events?

33.   What is the difference between Future and Stream?

Error Handling

34.   How do you handle exceptions in Dart?

35.   What is the difference between try-catch and try-on?

36.   What is finally block in Dart?

37.   What are custom exceptions in Dart?

Miscellaneous

38.   What is the difference between dynamic and Object in Dart?

39.   What are symbols in Dart?

40.   What is rethrow in Dart?

41.   What is assert in Dart?

42.   How do you import libraries in Dart?

43.   What is the use of 'part' and 'part of' in Dart?

44.   What is deferred loading in Dart?