2.1.3 The use of, and need for, data structures

Question 1

Define:

Data Structures

Answer 1

“Collection of data objects which facilitate the storing and managing of data in a program”

Question 2

State:

2 advantages of using data structures

Answer 2

• Optimise memory usage within a system
• Can be reused and compiled into libraries

Question 3

State:

“A collection of data items, can be of different data types and items are accessed using each data items index value”

Answer 3

List

Question 4

State:

“Contains a group of elements of the same data type”

Answer 4

Array

Question 5

Define:

Dictionary

Answer 5

“A set of values, each with associated keys. Items are unordered and when accessed by the key, will return the associated value”

Question 6

Define:

Index

Answer 6

“A numerical representation of an item’s position in a sequence”