Understanding Instance Variables in Java

Lucy, a computer science student, introduces the concept of attributes in describing objects, using cakes as an example. She explains how these attributes are represented as instance variables in Java, allowing each object to have its own specific characteristics. The video covers creating classes and objects with attributes, using examples like cakes and students to illustrate how instance variables work in programming.

What is Lucy's field of study?

• Mathematics

• Computer Science

• Physics

• Biology

What does Lucy's research focus on?

• Accessibility and Human-Computer Interaction

• Data Science

• Cybersecurity

• Artificial Intelligence

How might you describe a cake to a chef?

• By its attributes like layers and toppings

• By its baking time

• By its nutritional value

• By its price

What term is used to describe the characteristics of an object?

• Methods

• Attributes

• Properties

• Functions

In Java, what do instance variables represent?

• Functions of a class

• Classes themselves

• Attributes of an object

• Methods of a class

What is the purpose of instance variables in a class?

• To store methods

• To store attributes of an object

• To store classes

• To store functions

What instance variables might you declare in a Cake class?

• Name, age, grade level

• Speed, distance, time

• Layers, flavor, toppings

• Height, weight, color

What value might you assign to the 'flavor' instance variable in a Cake class?

• Fast

• Vanilla

• 10

• Red

What instance variables might you declare in a Student class?

• Height, weight, color

• Speed, distance, time

• Name, age, grade level

• Layers, flavor, toppings

What happens when you create a student object in Java?

• It gets a copy of the class methods

• It gets a copy of the instance variables

• It gets a copy of the class itself

• It gets a copy of the functions