Unit 2

Which form of abstraction involves grouping together similarities within a problem to identify what kind of problem it is?

• Abstraction by generalisation

• Abstraction by value

• Abstraction by size

• Abstraction by date

What is meant by data abstraction?

• A form of abstraction in which details about how data is being stored are hidden.

• A form of abstraction in which details about how data is being stored are shown.

• A form of abstraction in which details about how information is being stored are hidden.

• A form of abstraction in which details about how information is being stored are hidden.

What is representational abstraction?

• A technique in which excessive details are removed to arrive at a representation of a problem that consists of only the key features.
• A technique in which random details are removed to arrive at a representation of a problem that consists of only the key features.
• A technique in which excessive details are removed to arrive at a representation of a problem that consists of no key features.
• A technique in which random details are removed to arrive at a representation of a problem that consists of no key features.

What kind of problems make use of multiple levels of abstraction?

• Large, complex problems

• Small, complex problems

• Large, simple problems

• Small, simple problems

How does abstraction allow non-experts to make use of a system?

• Hides complex and irrelevant information in abstract models.

• Displays the answer in easy to understand language

• Breaks the problem into small parts

• Problem can be split between multiple developers

State two advantages of using abstraction in software development

• Easier for programmers to focus on core elements

• Reduces the time needed to be spent on the project.

• Easier to remember syntax in high-level languages as it is closer to natural language

• Methods are an abstraction for the actions a real-world object is able to perform.

Give an applications of layers of abstraction

• Networking (TCP/IP layer)
• Victoria Sponge
• RGB
• Binary

State two advantages of using abstraction in programming languages

• Easier to remember syntax in high-level languages as it is closer to natural language

• Coding becomes accessible to beginners

• Programming becomes more secure

• Attributes are an abstraction for the characteristics of an object.

• Methods are an abstraction for the actions a real-world object is able to perform.

How does object-oriented programming use abstraction?

• Objects are an abstraction for real-world entities.

• Attributes are an abstraction for the characteristics of an object.

• Methods are an abstraction for the actions a real-world object is able to perform.

• Easier to remember syntax in high-level languages as it is closer to natural language

• Coding becomes accessible to beginners

What is the difference between abstraction and reality?

• Abstraction is a simplified representation of reality

• Attributes are an abstraction for the characteristics of an object.

• Methods are an abstraction for the actions a real-world object is able to perform.

• Easier to remember syntax in high-level languages as it is closer to natural language