1.7 Operating Systems
Explain how operating systems manage hardware, software, users, files, security and utility services.
How to study WJEC GCSE Computer Science
Learn the computing principle, apply it to the named system or scenario, trace the data and control flow, and test the result against requirements.
Core concepts
Concept 1
Processor, memory, device, file and storage management
Exam cue: Identify the current WJEC unit, the command word and whether the task asks for knowledge, application or computational analysis.
Concept 2
User interfaces, accounts, permissions, authentication and access control
Exam cue: Name the managed resource, describe the operating-system action and explain its effect on performance, usability or security.
Concept 3
Utility software, backup, compression, encryption, maintenance and monitoring
Exam cue: Use precise terminology, trace inputs and state changes, and test the answer against the data, scenario or program behaviour.
Risk pitfalls and guardrails
Calling every system utility part of the operating system without distinguishing the service it provides.
Guardrail: Avoid generic descriptions, unchecked traces and cross-board assumptions; make every answer depend on the named data, system, algorithm or scenario.
Importing the legacy WJEC structure, a different board's content or a Foundation/Higher tier assumption.
Guardrail: Use qualification code 3460QS or 3460CS and the current two-unit untiered structure; do not import a legacy or cross-board route.
Giving a generic description without applying it to the named system, data set, algorithm or pre-release scenario.
Guardrail: Practice cannot replace the annual live brief, specified Python environment, clean-copy rule, restricted examination files or Surpass upload process.
Memory anchors
Process management
Scheduling processor time and coordinating running programs.
Memory management
Allocating, tracking and reclaiming memory used by processes.
Device driver
Software that lets the operating system communicate with a particular hardware device.
File management
Organising files and folders and controlling storage, naming, access and retrieval.
User interface
The means through which a user interacts with the system, such as graphical or command-line controls.
Utility software
Software that maintains, protects, analyses or optimises a computer system.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
What is an operating system's core purpose?
What does process scheduling decide?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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