computerscience-ssc.docVIP

5COMPUTER SCIENCE For Class IX (marks 55) 1. Introduction to Computers History and development of computers Types of computers (analogue, digital, hybrid) Classification of digital computers (micro, mini, mainframe and super computer) Impact of computers and the internet on society Introduction to programming languages (high level, medium level and low level) concepts of compiler, interpreter and assembler. 2. Computer Components Central Processing Unit (CPU), Control Unit (CU), Arithmetic and Logic Unit (ALU) Busses: Data bus, Address bus, Control bus Primary/Main memory (RAM, ROM) Secondary memory, Input/output devices, Ports: serial and parallel ports Motherboard 3. Input/Output Devices Input devices: Key board, mouse, joystick, scanner, trackball, light pen, voice microphone, digital video camera, disk drive Output devices: - Monitors, printers and their kinds (daisy wheel, line, electrostatic, inkjet, electro thermal and laser), plotters, CD writer, disk drive (concept of soft copy and hard copy) 4. Storage Devices Main memory: RAM, ROM, SIMM, DIMM Memory units: Bits, byte (K bytes, M bytes, G bytes and T bytes). Secondary memory; Floppy disk, hard disk, compact disk, magnetic tape. 5. Computer Software Types of software: System software (operating system, programming language translator, service software and examples), Application software, DOS Commands: Executable Files, EXE, COM and BAT, DIR with Switches, CLS, DATE, TIME, COPY, VER, DEL, TYPE, FORMAT, COPY PRINT, SYS, CHKDSK, EDIT, XCOPY, DELTREE, PROMPT, REM, Create or make directory, Remove/Delete command, and other commonly used commands, Paths. 6. Introduction to WINDOWS Startup process of WINDOWS, Components of WINDOWS: Title bar, Status bar, Scroll bars, Menu bar, Dialog boxes, Familiarization with WINDOWS icons: My Computer, Recycle Bin, Start Button, Control Panel, Other sub menus, Clicking the start button, beginning with taskbar, Shut down process, Demonstr