4.2 Fundamentals of data structures

Question 1

What does Abstraction mean

Answer 1

Removing unnecessary details, from a problem making a comlex problem simpler

Question 2

What is Representational Abstraction

Answer 2

A scenario arrived by removing unnecessary details

Question 3

What is Abstraction by Genralisation

Answer 3

When you group things in terms of a set of common characteristics, describing a “kind of” relationship which arrives at a hierarchy where going up you genralise and as you go down you specialise

Question 4

What is Information Hiding

Answer 4

The process of hiding all of the details of an object that do not contribute to its essential characteristics

Question 5

How is information hidiing used practically

Answer 5

Most systems hide their complexity behind an interface as it provides abstraction of what lies behind, like in an OS which uses a GUI that allows the user to interact with the computer system without any knowledge of its work around

Question 6

What is the advantage of Information hiding and Interfaces

Answer 6

1 - Interfaces using information hiding allows the machine to be changed or upgraded without the need to modify the interface

Question 7

What is Procedural Abstraction

Answer 7

The result sof abstracting away the actual values used in a computation to create a procedure

Question 8

What is Functional Abstraction

Answer 8

Abstraction with disreagard to the computational method which creates a function which only necessitates the number, order and type of inputs to get the results

Question 9

What is the key distinction between Functional and Procedural Programming

Answer 9

In functional the particular computational method is hidden