← Years 5–6 Digital Systems

How components work together

Hardware and software cooperate in a sequence, such as input device, operating system, CPU, then output, to finish one user action like a mouse click or saving a file.

Part of: 5-6 Digital Technologies Vic Curric - Digital Systems & Security — Module 18, ACARA Digital Technologies Years 5–6 — Inside Digital Systems — Module 16, QCE Digital Solutions Unit 3 — Interactions Between Users, Data and Digital Systems — Module 13

Understanding How components work together in Years 5–6 Digital Systems

What it does: The click is hardware input, then the driver and operating system (software) pass it to the app, so both types work together. Every step is needed to complete the action, so without storage the save sequence cannot finish. Hardware needs software to tell it what to do, and software needs hardware to run on and to show results. A monitor is an output device and does not store files. Saved files are written to storage such as a hard drive, SSD or the cloud. If the input step of the sequence fails, the rest of the chain never starts, even if the output device works.

Common mistakes: The CPU processes instructions. RAM only holds data temporarily. The line should be: OS asks the CPU to process it. A monitor is an output device, not storage. Saving writes the data to a storage device, so it should be: OS writes data to the SSD.

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Learning
Duo
A student clicks the mouse to open a folder. Which order is correct?
Mouse (input) sends the click, the operating system and CPU process it, the screen (output) shows the folderThe screen shows the folder first, then the CPU processes the click, then the mouse sends it
Matches
mouse click → screen (no OS or CPU)
↓
This skips the operating system and CPU, but the click signal must be interpreted and processed before the screen can change.
Applying
Meanings
Term
components work together
Meaning
Hardware and software cooperate in a sequence, such as input device, operating system, CPU, then output, to finish one user action like a mouse click or saving a file.
Practice
Action: click a link with the mouse
Testing
Gaps
Mouse -> OS -> -> Screen
Check Answer
Spots
2Mouse signals the OS
3OS asks the RAM to process it

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Quick Questions

1. A student clicks the mouse to open a folder. Which order is correct?
A. The screen shows the folder first, then the CPU processes the click, then the mouse sends it
B. Mouse (input) sends the click, the operating system and CPU process it, the screen (output) shows the folder ✓
Input comes first. The mouse sends the signal, the operating system and CPU process it, and the screen displays the result.
2. When you click a mouse, what does the operating system do?
A. It turns the click into electricity inside the mouse
B. It receives the click signal and tells the CPU and the right application what to do ✓
The operating system is software that links hardware and applications. It passes the input on so the action can be processed.
3. Which statement is true about completing one user action?
A. Hardware and software must both work together in a sequence ✓
B. Hardware can finish the action alone without any software
Hardware needs software to tell it what to do, and software needs hardware to run on and to show results.
4. A student saves a homework file. Where does the data end up?
A. The CPU processes the save command and the data is written to a storage device ✓
B. The data is saved only in the monitor so it can be seen later
A monitor is an output device and does not store files. Saved files are written to storage such as a hard drive, SSD or the cloud.
5. While you are typing a document, where is it held before you save it?
A. In memory (RAM), which the CPU can access quickly ✓
B. In the keyboard, until the save button is pressed
Input devices only send signals. The open document is held in RAM while you work, then saved to storage.

Match the Pairs

mouse click → OS → CPU → screen → The input device sends a signal, the operating system passes it on, the CPU processes it and the screen shows the result
Save: app → OS → CPU → storage → The app asks the operating system to save, the CPU processes the request and the file is written to storage
Input hardware starts the sequence when a user acts, and software then handles the signal → click → driver → OS → app
If one component is missing, the sequence breaks and the action cannot be finished → no storage → file cannot be saved
mouse click → screen (no OS or CPU) → This skips the operating system and CPU, but the click signal must be interpreted and processed before the screen can change.
Save: app → storage (no OS) → This skips the operating system, which manages the request and the storage device, so the app cannot save a file on its own.

Key Term

components work together
Hardware and software cooperate in a sequence, such as input device, operating system, CPU, then output, to finish one user action like a mouse click or saving a file.

Fill in the Blanks

1. Mouse -> OS -> CPU -> Screen
Hint: Type the component that processes the instructions after the operating system passes on the click.
2. Save file: OS -> CPU -> storage
Hint: Type the kind of device where the file is kept long-term at the end of the sequence.
3. No output device = cannot see the result
Hint: Type the kind of device that is missing when you cannot see the result of an action.
4. No OS: the mouse click is not understood
Hint: Type the short name for the software that links the mouse to the rest of the system.
5. Click Save (input device) OS and CPU process the request File is written to storage
Hint: Type the middle step that comes between input and output.

Spot the Error

Question 1
A Mouse detects a click
B Mouse signals the OS
C OS asks the RAM to process it
D Screen shows the new result
Line C — The CPU processes instructions. RAM only holds data temporarily. The line should be: OS asks the CPU to process it.
Question 2
A User clicks Save
B Keyboard sends the command
C OS finds the file data in RAM
D OS writes data to the monitor
E Screen shows a Saved message
Line D — A monitor is an output device, not storage. Saving writes the data to a storage device, so it should be: OS writes data to the SSD.
Question 3
A No mouse is plugged in
B The click is never detected
C So the OS still gets a signal
D Nothing happens on the screen
Line C — If the mouse is missing, no click is detected, so the OS never receives a signal. It should be: So the OS never gets a signal.
Question 4
A Keyboard sends the typed key
B OS passes it to the speaker
C Screen displays the letter
Line B — The OS passes the input to the CPU to be processed, not to a speaker. It should be: OS passes it to the CPU.
Question 5
A Press Save on the document
B OS needs no storage to save
C Without a drive, save fails
Line B — Saving a file needs a storage device to keep the data. That is why the save fails without a drive. It should be: OS needs storage to save it.

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