1st session

What is Dart primarily used for?

• Backend development

• Mobile app development

• Desktop applications

• Game development

Which of the following is NOT a valid data type in Dart?

• int

• float

• bool

• string

How do you create a nullable variable in Dart?

• int value;

• int value!;

• int? value;

• nullable int value;

What is the purpose of the ! operator in Dart?

• To declare a nullable variable

• To check if a value is null

• To negate a boolean value

• To force a nullable value to be treated as non-null

What does the following code output?
void main() {
var a = 5, b = 3;
print(a ~/ b);
}

• 1.6666

• 1

• 2

• Error

What is the output of the following code?
void main() {

var x = 10;

print(x is String);

}

• true

• false

• error

• null

Which method is used to add an item to a list in Dart?

• addItem()

• append()

• add()

• push()

What is the purpose of the late keyword in Dart?

• Declares a variable that must be initialized later

• Declares a constant variable

• Declares a nullable variable

• Declares a variable with no type

What is the output of the following code?
void main() {

String? name;

print(name ?? 'No Name');

}

• null

• No Name

• Error

• Empty string

What is the difference between const and final in Dart?

• final is used for runtime constants, and const is used for compile-time constants.

• Both are identical in Dart.

• const allows reassignment, while final does not.

• final variables are immutable, while const variables are not.