ALGORITHMS

Question 1

What is an algorithm

Answer 1

Ordered sequence of steps that solve a problem in a limited number of steps.

Question 2

Properties of an Algorithm?

Answer 2

Finiteness
Clear instructions
Input and output
Effective
Sequence of execution
Scope definitions

Question 3

Pseudocode

Answer 3

Informal language that helps programmers develop
algorithms. Similar to everyday English

Question 4

3 methods used in creating an algorithm

Answer 4

STEPPING, LOOPING and CHOOSING

Question 5

Stepping

Answer 5

Where all the instructions needed to solve a problem is set out
one after the other.

Question 6

Looping? What the 3 types?

Answer 6

Repeat instruction/ set of instructions a number of times.

REPEAT UNTIL loop
WHILE loop
FOR loop

Question 7

Choosing?

Answer 7

Method for making a choice, and uses the commands
IF, THEN and sometimes (but not always) ELSE

Question 8

The Flowchart & symbols

Answer 8

A graphical representation of the sequence of operations .

Oval: initialization/end (defines the starting and ending point of a flowchart.)

Rectangle: Input / Output
/Process (The inputting of data for processing and printing out of
processed data. Manipulation of data.)

Diamond: Decision (process conditions using relational operators. Used for
trapping and filtering data)

Arrows: flow lines (defines logical sequence order of program)