A/L ICT Lesson 05: Operating Systems
Bilingual, exam-focused notes for Unit 5 of the Sri Lankan GCE Advanced Level ICT syllabus (Grade 12), covering operating systems. The lesson explains the functions of an operating system, process management (process versus program, the Process Control Block, context switching and the process state model), memory management (virtual memory, paging, segmentation and the Memory Management Unit), and file management (FAT and NTFS, and contiguous, indexed and linked allocation). It also introduces CPU scheduling ideas such as multiprogramming, time sharing, Round Robin, and long-term versus short-term schedulers. Includes an interactive process-state simulator, structured A/L essay questions with model answers, fifteen five-option MCQs with explanations, and bilingual flashcards.
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