Software Design and Development (Implementation: Data Types and Structures)

Question 1

What are the five data types?

Answer 1

Integer
Real
Character
String
Boolean

Question 2

What are Integers?

Answer 2

Integers are positive or negative WHOLE numbers

Example Data: 17

Question 3

What are Real numbers?

Answer 3

Real Numbers are positive or negative numbers with decimal points

Example Data: 17.11

Question 4

What are Characters?

Answer 4

Characters are any one number, letter or symbol

Example Data: A

Question 5

What are Strings?

Answer 5

Strings are collections of characters stored together as one

Example Data: Darren

Question 6

What are Booleans?

Answer 6

Boolean is either (True/False) or (On/Off) or (Yes/No)

Example Data: True

Question 7

What are Arrays?

Answer 7

An array is a data structure which stores a group of values of the same data type

Question 8

What data type is a phone number and why?

Answer 8

A phone number is an example of String Data. Phone numbers are not stored as integers, as the integer data type holds values that have the potential to be used in calculations.

Question 9

What is the name given to the unique identifiers used in arrays?

Answer 9

Keys

Question 10

What number do keys start at?

Answer 10

0

Question 11

What is an equivalent to the following piece of code?

DECLARE age1 AS INTEGER INITIALLY 0
DECLARE age2 AS INTEGER INITIALLY 0
DECLARE age3 AS INTEGER INITIALLY 0

Answer 11

DECLARE ageArray AS ARRAY OF INTEGER INITIALLY [0]*3