IGCSE Computer Science 0478 — 4.1 Types of Software and Interrupts
System software, application software, and how a CPU handles interruptions.
Modules (62)
1
Hardware
2
Software
3
System software
4
Application software
5
Examples of application software
6
System software versus application software
7
Operating system
8
Utility software
9
Antivirus software
10
Firewalls
11
Backup systems
12
Disk defragmentation utility
13
Disk formatting utility
14
File compression utility
15
Classifying software as system or application
16
The nine functions of an operating system
17
OS function: managing files
18
What is a user interface?
19
OS function: providing a graphical user interface (GUI)
20
OS function: providing a command-line interface (CLI)
21
Peripheral
22
Device drivers
23
OS function: managing peripherals and drivers
24
Memory (RAM)
25
OS function: managing memory
26
OS function: managing multitasking
27
OS function: providing a platform for running applications
28
OS function: providing system security
29
Operating system updates
30
Digital account
31
User permissions: read, write and execute
32
OS function: managing user accounts
33
Matching a scenario to an operating system function
34
Firmware
35
Read only memory (ROM)
36
Volatile and non-volatile memory
37
Bootloader
38
The start-up sequence of a computer
39
Layers: applications, operating system, firmware and hardware
40
Why an application needs the operating system, firmware and hardware
41
Central processing unit (CPU)
42
The fetch-decode-execute cycle
43
Registers
44
Program counter (PC)
45
Interrupt
46
Why computers use interrupts
47
Keyboard
48
Optical mouse
49
Hardware interrupts
50
Runtime error: divide by zero
51
Software interrupts
52
Hardware interrupts compared with software interrupts
53
Classifying an event as a hardware or software interrupt
54
How an interrupt is generated
55
The CPU checks for interrupts after each cycle
56
Interrupt priority
57
Interrupt service routine (ISR)
58
Saving the CPU's state before handling an interrupt
59
What happens as a result of an interrupt
60
Interrupt handling step by step
61
OS function: handling interrupts
62
Writing an exam answer about software and interrupts
Smaller journeys, one per content description
The same modules, split up so a class can take just the content description it's working on.
15
IGCSE Computer Science 0478: System and application software
Students learn to tell system software (the operating system and utility software) from application software and to give examples of each.
18
IGCSE Computer Science 0478: Functions of an operating system
Students learn the role of an operating system and its functions for files, interface, peripherals and drivers, memory, multitasking, running applications, security and user accounts.
7
IGCSE Computer Science 0478: Hardware, firmware and the operating system
Students learn how the hardware, firmware with its bootloader, and the operating system work together in layers to run application software.
22
IGCSE Computer Science 0478: Interrupts
Students learn how hardware and software interrupts are generated, how the CPU handles them with an interrupt service routine, and what happens as a result.
Printables for this journey
Every module above has its own free printable worksheet with an answer key. These crosswords and word searches cover the same terms:
✎
VCE Cyber Security Crossword: Emerging trends in cyber security to Antivirus software (Modules 1–10)
10 clues · Emerging trends in cyber security, Regulatory compliance, Zero Trust Architecture, Routers and more
✎
VCE Cyber Security Crossword: Worms to Operating system updates (Modules 31–40)
10 clues · Worms, Ransomware, Denial of service attacks, Improper credential management and more
🔎
VCE Cyber Security Word Search: Emerging trends in cyber security and more (Modules 1–20)
20 words to find · Emerging trends in cyber security, Regulatory compliance, Zero Trust Architecture, Routers and more
🔎
VCE Cyber Security Word Search: Local Area Networks (LANs) to Operating system updates (Modules 21–40)
20 words to find · Local Area Networks (LANs), Wide Area Networks (WANs), Wireless Personal Area Networks (WPANs), Global exposure to cyber security threats and more
✎
Years 5–6 Digital Systems Crossword: Inside digital systems (Modules 1–10)
10 clues · Digital system, Hardware, Software, Input, process, output and storage and more
✎
Years 5–6 Digital Systems Crossword: Inside digital systems and Data and networks (Modules 11–20)
10 clues · Cloud storage, Motherboard, Graphics processing unit (GPU), Network interface (wired and wireless adapter) and more
✎
Years 5–6 Digital Systems Crossword: Data and networks and Accounts, passphrases and security (Modules 31–40)
10 clues · Modem, Wireless access point, IP address, Data packets and more
🔎
Years 5–6 Digital Systems Word Search: Inside digital systems and Data and networks (Modules 1–20)
20 words to find · Digital system, Hardware, Software, Input, process, output and storage and more
🔎
Years 5–6 Digital Systems Word Search: Data and networks and Accounts, passphrases and security (Modules 21–52)
20 words to find · Data transmission, Wired transmission, Wireless transmission, Bluetooth for short-range transfer and more
✎
Years 5–6 Creating Digital Solutions Crossword: Designing algorithms with branching and iteration and Designing user interfaces (Modules 21–30)
10 clues · Branching inside a loop, Algorithms that use sequence, branching and iteration together, Drawing a sequence in a flowchart, Drawing a decision in a flowchart and more
🔎
Years 5–6 Creating Digital Solutions Word Search: Designing algorithms with branching and iteration and Designing user interfaces (Modules 21–40)
20 words to find · Branching inside a loop, Algorithms that use sequence, branching and iteration together, Drawing a sequence in a flowchart, Drawing a decision in a flowchart and more
✎
Years 9–10 Digital Systems Crossword: Controlling and securing access to data (Modules 13–24)
10 clues · Confidentiality, Integrity, Availability, Authentication vs authorisation and more
🔎
Years 9–10 Digital Systems Word Search: Controlling and securing access to data and Threats and software vulnerabilities (Modules 13–40)
20 words to find · Confidentiality, Integrity, Availability, Authentication vs authorisation and more
✎
VCE Software Development U3O1 Crossword: Searching and sorting algorithms and Errors and debugging (Modules 156–166)
10 clues · Comparing searching and sorting algorithms, Applying an algorithm to a task, Logic errors in Python, Runtime errors in Python and more
🔎
VCE Software Development U3O1 Word Search: Object-oriented programming to Errors and debugging (Modules 142–166)
20 words to find · OOP principle: inheritance, Calling the parent __init__ with super(), Linear search in Python, Binary search in Python and more
✎
Crossword: 3.1 Computer Architecture (Modules 218–227)
10 clues · Registers, Program counter (PC), Memory address register (MAR), Memory data register (MDR) and more
✎
Crossword: 3.1 Computer Architecture (Modules 228–239)
10 clues · The fetch-decode-execute cycle, Fetch: sending the address from the PC to the MAR, Fetch: reading the instruction from RAM into the MDR, Fetch: incrementing the PC and copying the instruction to the CIR and more
✎
Crossword: 3.1 Computer Architecture and 3.2 Input and Output Devices (Modules 240–251)
10 clues · Machine code, Embedded system, Devices that use embedded systems, General-purpose computer and more
✎
Crossword: 3.2 Input and Output Devices and 3.3 Data Storage (Modules 293–303)
10 clues · Sensors, microprocessor and actuator in a control system, Matching sensors to the data they capture, Choosing the most suitable sensor for a given context, Choosing input devices, output devices and sensors together for a system and more
✎
Crossword: 3.4 Network Hardware and 4.1 Types of Software and Interrupts (Modules 356–372)
10 clues · Writing exam answers about network hardware and addresses, System software, Examples of application software, System software versus application software and more
✎
Crossword: 4.1 Types of Software and Interrupts (Modules 373–389)
10 clues · OS function: managing files, OS function: providing a graphical user interface (GUI), OS function: providing a command-line interface (CLI), OS function: managing peripherals and drivers and more
✎
Crossword: 4.1 Types of Software and Interrupts (Modules 390–408)
10 clues · Firmware, Bootloader, The start-up sequence of a computer, Layers: applications, operating system, firmware and hardware and more
✎
Crossword: 4.1 Types of Software and Interrupts (Modules 409–418)
10 clues · Classifying an event as a hardware or software interrupt, How an interrupt is generated, The CPU checks for interrupts after each cycle, Interrupt priority and more
🔎
Word Search: 3.1 Computer Architecture (Modules 218–239)
21 words to find · Registers, Program counter (PC), Memory address register (MAR), Memory data register (MDR) and more
🔎
Word Search: 3.1 Computer Architecture and 3.2 Input and Output Devices (Modules 240–261)
22 words to find · Machine code, Embedded system, Devices that use embedded systems, General-purpose computer and more
🔎
Word Search: 3.2 Input and Output Devices and 3.3 Data Storage (Modules 283–303)
22 words to find · Humidity sensor, Infra-red sensor, Level sensor, Light sensor and more
🔎
Word Search: 3.4 Network Hardware and 4.1 Types of Software and Interrupts (Modules 356–389)
20 words to find · Writing exam answers about network hardware and addresses, System software, Examples of application software, System software versus application software and more
🔎
Word Search: 4.1 Types of Software and Interrupts (Modules 390–418)
20 words to find · Firmware, Bootloader, The start-up sequence of a computer, Layers: applications, operating system, firmware and hardware and more
Frequently Asked Questions
Are these worksheets free?
Yes — every worksheet and its answer key is free to view, download, and print, with no account required to access any individual module.
Do I need an account?
No account is needed to view or print a worksheet. A free teacher account adds extras like assigning modules to a class and tracking progress automatically — it takes under three minutes to set up and doesn't need a credit card.
What year level is this for?
This curriculum is aligned to the Australian Curriculum (ACARA) and Victorian Curriculum, spanning roughly Years 3 to 10 — from first sequencing and variables through to object-oriented programming and advanced data structures. Start wherever matches your class's current level; each module builds on the last.
Can I print them?
Yes — every module has a one-click Print Worksheet button that generates a printable page with the practice questions and a full answer key.
Is this aligned to a curriculum?
Yes — the module sequence is mapped to the Australian Curriculum (ACARA) and Victorian Curriculum, and a class's progress is reported back against those curriculum bands (e.g. ACARA Years 5–6 sequencing and iteration, Years 7–8 functions and data structures), not just a generic difficulty scale.
Can students use this without a teacher?
Yes — students can start any module and practice directly, no class or account required. Joining a teacher's class with a class code adds progress tracking, class badges, and live Sprints, but isn't needed to work through the worksheets or modules solo.
Do I need to know IGCSE Computer Science Paper 1 myself to teach this?
No — every module comes with a full worked answer key, and Cloodit tracks who's stuck automatically, so you don't need to solve each exercise yourself before assigning it or be able to debug a student's work line by line.
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