Flowcharts and Data Types

Question 1

Define integer

Answer 1

An integer data type deals which numbers(not decimals).
A complete unit of entity’s (1,2,3,-1,0)

A member of the set of positive whole numbers, negative while numbers and zero

Question 2

Floating point numbers

Answer 2

Floating-point numbers have no fixed number if digits before and after the decimal point.
The decimal point can float e.g.
4.0,-133.8

Question 3

What is a variable

Answer 3

Variables are data entities whose values can be changed

Question 4

Define real/float

Answer 4

A data type containing numerical data in a decimal form. E.g.
4.1,3.1459

Used in situations where more accurate information is required

Question 5

Define Boolean

Answer 5

A days type that represents the values of ‘true or false’ ,
‘yes or no’ or ‘on or off’

AND=true only if both sides are true
OR= true if either side is true
NOT= changes ‘true’ to ‘false’ and ‘false’ to ’true’

Question 6

What is a string

Answer 6

A string represents text in a program.
A string is composed of a set of characters e.g. ‘Hamburger’ or
‘I ate 5 hamburgers’

Question 7

Define what a constant is

Answer 7

Data entities whose values cannot be altered

Question 8

What is the symbol for ‘start’ , ‘end’ , ‘process’ and ‘decision’ in a flow chart

Answer 8

‘start’ and ‘end’=curved rectangle
‘Process’=rectangle
‘Decision’=diamond

Question 9

Define a decision in flow charts

Answer 9

A decision symbol represents a Boolean choice:
Has exactly 2 inputs and outputs
Contains a question with only 2 answers
The 2 outputs are labelled with the 2 answers to the question

Question 10

What is a sequence

Answer 10

A sequence is a set of instructions or actions in order.

Meaning each action follows the previous action

Question 11

What is an array

Answer 11

An array is an ordered arrangement of data elements that are accessible by referring their location within the array

Question 12

Define selection

Answer 12

A selection control structure involves a choice. (If—then—else)

Question 13

Define a process in a flow charts

Answer 13

A process symbol represents some operations that is carried out on an element of data:
It has exactly 1 inputs and 1 output
It contains a brief description describing the process being carried out on the data

Question 14

What is iteration

Answer 14

Iteration is where a statement is executed in a loop until the program reaches a certain state or the intended operation has been applied to every data element of an array

Question 15

What is a while statement

Answer 15

While statement are efficient loops that will continue to loop until the condition is false