BCS-111 – Computer Basics and PC Software (IGNOU BCA)

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38-page PDF, all 3 blocks, explained in easy Hinglish Computer basics: characteristics, history, generations, types, applications and limitations Block diagram of a computer: CPU, ALU, CU, registers, fetch–decode–execute cycle Number systems: solved conversions (binary, octal, decimal, hex), 1’s and 2’s complement, ASCII, Unicode Logic gates with truth tables Memory: hierarchy, RAM vs ROM, cache, HDD/SSD structure Input/output devices, printers, PC configuration, BIOS/UEFI, booting Software types, open source vs proprietary, OS functions and types, process states Programming languages, compiler vs interpreter, algorithms and flowcharts Networking: LAN/MAN/WAN, topologies, devices, OSI vs TCP/IP, IP address, DNS Email, WWW, blogging, e-learning, wikis, social networking IGNOU exam pattern, answer-writing tips, model answers, important questions and 60 one-liners for viva/revision

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Published: 11 October 2026

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