Splitting a scenario into inputs, processes, outputs and storage

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. ATM cash withdrawal: the customer types in a PIN. Which group does the PIN belong to?

A Input

B Output

2. ATM cash withdrawal: the system checks the balance is high enough for the amount requested. Which group is this?

A Storage

B Process

3. Quiz game: the high-score table is saved so it is still there next time the game starts. Which group is this?

A Input

B Storage

4. Quiz game: the player's score is shown on the screen at the end. Which group does it belong to?

A Output

B Process

5. Automatic greenhouse: a temperature sensor reads 31 degrees. Which group is the sensor reading?

A Input

B Output

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1INPUT PIN		AATM: the card PIN typed by the customer is data going in, so it goes in the input group
2balance ← balance - amount		BATM: working out the new balance is something the program does, so it goes in the process group
3Quiz game: the high-score table must be kept after the game ends, so it is sorted as storage		CStorage is missing. The account balance and PIN must be kept somewhere, so the check for missing parts was skipped.
4Greenhouse: a sensor reading is data coming in, and the check against the limit is a process that decides what happens next		DIF temperature > 30 THEN OPEN window
5Quiz game decomposition: Input = score is displayed on screen		EWRITE highScores TO file
6ATM decomposition: Input = PIN, Process = check PIN, Output = notes given out (no storage listed)		FShowing the score on screen is an output, not an input. Input is data the player enters, such as an answer.

Definitions

Input, Process, Output, Storage

Fill in the Blanks

Complete each line of code by filling in the missing parts.

Typing the PIN at an ATM is an _____

Checking the PIN matches is a _______

Showing the cash amount is an ______

Quiz high scores kept in a file are _______

Sensor reads temperature: input Compare with the target: _______ Switch fan on or off: output

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A ATM cash withdrawal

B Input: cash, amount wanted

C Process: check the balance

D Output: cash and receipt

E Storage: account balance

Question 2

A Output: player's answer

B Process: compare with correct

C Output: score on screen

D Storage: high-score table

Question 3

A Process: temperature sensor

B Process: compare to set limit

C Output: open the window

D Storage: daily temp log

Question 4

A Quiz game high-score table

B Storage: none needed

C Process: add 1 for correct

D Output: show the table

E Input: player's name

Question 5

A Automatic greenhouse

B Input: temperature, moisture

C Process: compare with limits

D Input: sprinkler turns on

E Storage: readings log

Answer Key

Splitting a scenario into inputs, processes, outputs and storage

Section A: Quick Questions

A — Input

B — Process

B — Storage

A — Output

A — Input

Section B: Match the Pairs

INPUT PIN → ATM: the card PIN typed by the customer is data going in, so it goes in the input group

balance ← balance - amount → ATM: working out the new balance is something the program does, so it goes in the process group

Quiz game: the high-score table must be kept after the game ends, so it is sorted as storage → WRITE highScores TO file

Greenhouse: a sensor reading is data coming in, and the check against the limit is a process that decides what happens next → IF temperature > 30 THEN OPEN window

Quiz game decomposition: Input = score is displayed on screen → Showing the score on screen is an output, not an input. Input is data the player enters, such as an answer.

ATM decomposition: Input = PIN, Process = check PIN, Output = notes given out (no storage listed) → Storage is missing. The account balance and PIN must be kept somewhere, so the check for missing parts was skipped.

Section C: Definitions

Input, Process, Output, Storage — Read the scenario and sort every part into input (data in), process (what is done), output (result shown) or storage (data kept). Then check nothing is missing or in the wrong group.

Section D: Fill in the Blanks

Typing the PIN at an ATM is an input

Checking the PIN matches is a process

Showing the cash amount is an output

Quiz high scores kept in a file are storage

Sensor reads temperature: input
Compare with the target: process
Switch fan on or off: output

Section E: Spot the Error

B — Cash is what the ATM gives out, so it is an output, not an input. The input line should be 'Input: PIN, amount wanted'.

A — The answer is typed in by the player, so it is an input. The line should be 'Input: player's answer'.

A — A sensor reading is data going into the system, so it is an input. Comparing it with the limit is the process. The line should start 'Input:'.

B — A high-score table must be kept after the game ends, so something is missing from storage. It should be 'Storage: names and top scores'.

D — The sprinkler switching on is a result the system produces, so it is an output. It should be 'Output: sprinkler turns on'.