Abstraction-visual

What is the job title of the person in the image?

• Developer
• Tennis player
• Manager
• Engineer

Answer explanation

The answer is Developer because the image shows a person with the job title of "Developer". The person's name is Viktor, and their skills include "coding" and "problem solving". The image also shows that the person's job is to develop software.

What is the shape of the boxes in the image?

• Circle
• Square
• Rectangle
• Triangle

Answer explanation

The answer is Square because the boxes in the image are all squares. The text in the image says that the class Shape is extended by Circle and Square, and that Circle and Square both implement the interface Shape. This means that the boxes in the image must be squares, because they are both subclasses of Shape and implement the interface Shape.

What is the concept of object-oriented programming that is being illustrated in the image?

• Abstraction
• Encapsulation
• Polymorphism
• Inheritance

Answer explanation

The answer is Abstraction because the image shows how abstraction is used to hide the implementation details of an object and only expose the relevant data and functionality to the user. The text in the image says that "Abstraction is used for hiding the unwanted data & giving relevant data." This is a definition of abstraction in object-oriented programming.

Which of the following is an example of an abstract class in the image?

• Car
• IMachine
• Audi
• accelerate()

Answer explanation

The answer is Car because the class Car is declared as abstract. This means that the class cannot be instantiated, and it can only be inherited from. The text in the image says that "Abstract classes are used to define the common behavior of a group of classes." This is a definition of an abstract class in object-oriented programming.

Which of the following methods is abstract in the image?

• getColor()
• area()
• toString()
• None of the above

Answer explanation

The answer is None of the above because all of the methods in the image are concrete methods. A concrete method is a method that can be implemented in a subclass. The text in the image says that "Abstract methods are methods that are declared in an abstract class, but they are not implemented in the abstract class." This means that abstract methods must be implemented in a subclass.

What is the message of the image?

• Love is painful.
• Love is powerful.
• Love is abstract.
• Love is everything.

Answer explanation

The answer is 3. Love is abstract because the image shows how love can be represented in different ways. The heart with an arrow through it is a traditional symbol of love, but the image also shows other ways of representing love, such as the abstract shapes and colors. This suggests that love is a complex emotion that can be expressed in many different ways.

What is the difference between the two Lego figures in the image?

• The one on the left is a duck, and the one on the right is a block.
• The one on the left is a more abstract representation of a duck, and the one on the right is a more literal representation of a duck.
• The one on the left is a more complex representation of a duck, and the one on the right is a simpler representation of a duck.
• The one on the left is a more realistic representation of a duck, and the one on the right is a more cartoonish representation of a duck.

Answer explanation

The answer is 2. The one on the left is a more abstract representation of a duck, and the one on the right is a more literal representation of a duck because the Lego figure on the left is made up of a few simple shapes, while the Lego figure on the right is made up of many more detailed shapes. This suggests that the Lego figure on the left is a more abstract representation of a duck, while the Lego figure on the right is a more literal representation of a duck.

Which of the following is the role of the payroll system in the image?

• Calculates the salary of the person.
• Manages the payroll process.
• Keeps track of the working hours of the person.
• Prints the payslip of the person.

Answer explanation

The answer is 2. Manages the payroll process because the image shows the payroll system as a central hub for all of the activities related to payroll. The payroll system is responsible for calculating the salary of the person, keeping track of the working hours of the person, and printing the payslip of the person.

Which of the following concepts of object-oriented programming is illustrated in the image?

• Abstraction
• Encapsulation
• Polymorphism
• Inheritance

Answer explanation

The answer is 2. Encapsulation because the image shows how the data and methods of an object are bundled together into a single unit. The data and methods are hidden from the outside world, and they can only be accessed through the public methods of the object. This is a definition of encapsulation in object-oriented programming.

What is the concept of object-oriented programming that is being illustrated in the image?

• Abstraction
• Encapsulation
• Polymorphism
• Inheritance

Answer explanation

The answer is Abstraction because the image shows how the implementation details of a function property are hidden from the user. The user is only able to view basic functionalities, while the internal details are hidden. This is a definition of abstraction in object-oriented programming.