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class 8 chapter 1 wxer cise answer

Operating System (OS) – Class 8 Notes 1. Operating System (OS) Definition: An Operating System is system software that controls and manages the computer hardware and software and allows the user to interact with the computer. Examples: Microsoft Windows Linux macOS Android Functions of an Operating System Manages hardware devices. Runs application programs. Manages memory. Controls input and output devices. Provides user interface (GUI or CUI). Manages files and folders. Types of Operating System 1. Multitasking Operating System Definition: A multitasking OS allows a computer to run more than one program at the same time . Example: Microsoft Windows macOS Example Situation: Listening to music while typing a document. Use: In personal computers For office work 2. Multi-user Operating System Definition: A multi-user OS allows multiple users to use the same computer system at the same time . Examples: Unix Linux Use: Used in servers Used in banks and large organizations 3. Real-Time Op...
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class 7 chapter 1

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 Here are simple notes for Class 7 students about Computer Memory, Hardware Devices, Ports, and Storage Devices . The language is simple so students can understand easily. Computer Notes for Class 7 1. What is Memory? Memory is the part of a computer that stores data, instructions, and information so that the CPU can use them. 📌 Example: When you open a game or program, the computer stores the data in memory so it can run. Types of Memory Primary Memory (Main Memory) RAM ROM Secondary Memory (Storage Devices) Hard Disk SSD CD/DVD 2. RAM (Random Access Memory) RAM is the temporary memory of the computer. It stores data while the computer is running . If the computer turns off, the data is lost . Types of RAM SRAM (Static RAM) Faster Expensive Used in cache memory DRAM (Dynamic RAM) Slower than SRAM Cheaper Used in main memory Functions of RAM Stores data while programs are running Helps CPU process information quickly Runs software and applications 3. ROM (Read Only Memory) RO...
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