CompSci A Unit 5: Classes and Objects

What is a class in programming?

• A class in programming is a blueprint for creating objects and defining their behavior.

• A class in programming is a variable that stores multiple values.

• A class in programming is a type of data structure.

• A class in programming is a function that performs a specific task.

How do you create an object in Java?

• MyClass obj = new();

• MyClass obj = MyClass();

• MyClass obj = create MyClass();

• MyClass obj = new MyClass();

What are class methods and attributes?

• Class methods and attributes are features of object-oriented programming languages.

• Class methods and attributes are only used in functional programming languages.

• Class methods and attributes are used to implement recursion in programming languages.

• Class methods and attributes are used to define variables in procedural programming languages.

What is the purpose of void methods in Java?

• Void methods in Java are used to return multiple values.

• Void methods in Java are used to terminate the program.

• Void methods in Java are used to perform mathematical calculations.

• The purpose of void methods in Java is to perform a task without returning a value.

What are parameters in Java methods?

• Parameters in Java methods are keywords used to define the method.

• Parameters in Java methods are variables used to pass values to the method.

• Parameters in Java methods are variables used to return values from the method.

• Parameters in Java methods are used to specify the return type of the method.

What is the syntax for defining a class in Java?

• class ClassName

• ClassName class

• public class ClassName

• def ClassName

How do you access class attributes in Java?

• MyClass.attributeValue()

• MyClass.getAttribute()

• MyClass.attribute

• MyClass.myAttribute

What is the difference between a class method and an instance method?

• A class method is bound to the class and can be called on the class itself, while an instance method is bound to an instance of the class and can only be called on an instance of the class.

• A class method is bound to an instance of the class and can only be called on an instance of the class.

• A class method can only be called within the class definition, while an instance method can be called from anywhere in the code.

• A class method is a static method that can be called on the class itself, while an instance method is a non-static method that can only be called on an instance of the class.

What is the return type of a void method?

• String

• int

• boolean

• void

How do you pass arguments to a method in Java?

• By declaring the arguments as global variables

• By specifying the data type and name of each argument within the parentheses of the method declaration.

• By passing the arguments as a string

• By using the 'pass' keyword