Algorithms

Question 1

What is an algorithm?

Answer 1

An algorithm is precise set of rules or instructions to solve a specific problem or task.

Question 2

What are the three main ways to design an algorithm?

Answer 2

• Structure diagrams
• Flowcharts
• Pseudocode

Question 3

What is a flowchart?

Answer 3

• Flowcharts are a visual tool that uses shapes to represent different functions to describe an algorithm
• Flowcharts show the data that is input and output, the processes that take place and any decisions or repetition
• Lines are used to show the flow of control

Question 4

What is a structure diagram?

Answer 4

• Structure diagrams show hierarchical top-down design in a visual form
• Each problem is divided into sub-problems and each sub-problem divided into further sub-problems
• At each level the problem is broken down into more detailed tasks that can be implemented using a single subroutine

Question 5

What is pseudocode?

Answer 5

Pseudocode is a text-based tool that uses short English words/statements to describe an algorithm.

Question 6

What shape is used to represent a process or something being performed or done in a flowchart?

Answer 6

Rectangle

Question 7

What shape is used to represent a subroutine call relating to a separate, non - linked flowchart?

Answer 7

Rectangle with two lines

Question 8

What shape is used to represent an input / output in a flowchart?

Answer 8

Parallelogram

Question 9

What shape is used to represent a Boolean decision in a flowchart?

Answer 9

Rhombus

Question 10

What shape is used to represent the terminator (start or stop) in a flow chart?

Answer 10

Round - Edged Square