21-22 Algorithms KS3

What is an algorithm?

• A computer program

• Some instructions a computer follows

• An Arabic word meaning "playing with numbers"

• A sequence of instructions designed to achieve a specific outcome

Which of the following are key algorithms?

• Subroutine

• Loop

• Selection

• Program

An algorithm is only as good as the information it acts upon hence the phrase:

• Don't count your chickens before they hatch

• Measure twice, cut once

• Garbage in, garbage out

• Computers do exactly what you tell them

Jayne wants to have a system in which the greenhouse windows open if the temperature reaches 30 degrees celsius. What key processes below will Jayne use?

• Decomposition

• Creation

• Abstraction

• Extraction

Reading this extract, identify the variable

• input

• store

• output

• name

Reading this extract and thinking how the program might work; if I enter the name "Jim" and age "75", what would the final output be?

• Hello Jim, You are a spring chicken

• Hello Jim, you are aged to perfection

• You are aged to perfection

• You are a spring chicken

Reading the image; what type of algorithm is

IF age >= 70 THEN

Output "...."

ELSE

Output "..."

• Loop

• Subroutine

• Selection

• Iteration

Looking at the image what word best describes it

• Pseudocode

• English

• Code

• Flowchart

Looking at the image how many variables are required according to diagram

• 0

• 1

• 2

• 3

If, as part of an algorithm, we needed to create a model of how a car could "see" pedestrians which of the following would NOT be a useful part of the abstraction?

• Colour of shoes of pedestrian

• Position of pedestrian

• Speed of car

• Speed of pedestrian

• Height of pedestrian