What is the entry point of every Dart application?

• start()
• init()
• main()
• run()

Which keyword is used to declare a compile-time constant?

• final
• const
• static
• fixed

How do you perform string interpolation in Dart?

• {var}
• #var
• $var
• @var

Which data type is used for whole numbers in Dart?

• float
• double
• int
• num

What does '?' mean when added to a type (e.g., String?)?

• It's a secret
• The variable can be null
• It's a dynamic type
• It's a constant

Which keyword is used to inherit a class?

• implements
• extends
• with
• inherits

What is a Mixin?

• A type of constructor
• A way to reuse code in multiple classes
• A private variable
• A data type

Which keyword allows a variable to be initialized later?

• late
• future
• async
• await

What is the purpose of an Abstract Class?

• To be instantiated
• To define an interface for others
• To hide data
• To speed up the app

Which keyword is used to handle exceptions?

• try-catch
• error-handle
• fail-safe
• attempt

What is a Dart Isolate?

• A UI component
• An independent worker with its own memory
• A network socket
• A CSS style

How do Isolates communicate?

• Shared memory
• Message passing
• Global variables
• Static methods

What is a StreamController used for?

• Controlling UI
• Creating and managing a stream
• Sorting lists
• Handling HTTP

What is Dart FFI?

• Fast File Interface
• Foreign Function Interface (C/C++ integration)
• Flutter Fast Install
• Full File Integration

Which constructor creates a single instance only?

• Singleton/Factory
• Default
• Named
• Const