Key facts

  • For CET Graduation 2026, Computer Knowledge must follow the official RSSB bullets: characteristics and applications of computers;
  • A computer is an electronic programmable data-processing system: it accepts input, processes data under stored instructions, stores data or results, a...
  • Computer organization connects CPU, main memory, storage, input devices, output devices and files;
  • An operating system is system software that manages processor time, memory, files, devices, security, user accounts and the user interface;
  • Internet and e-mail questions can test browsers, websites, URLs, search, attachments, CC/BCC, spam, phishing, malware attachments, HTTPS, strong passw...

Key Points at a Glance

  1. 1

    For CET Graduation 2026, Computer Knowledge must follow the official RSSB bullets: characteristics and applications of computers; operating system, internet and e-mail; computer organization including RAM, ROM, file system, input devices and output devices; MS Word, MS Excel/spreadsheet and MS PowerPoint; cyber security; e-services; and Artificial Intelligence.

  2. 2

    A computer is an electronic programmable data-processing system: it accepts input, processes data under stored instructions, stores data or results, and gives output.

  3. 3

    Computer organization connects CPU, main memory, storage, input devices, output devices and files; RAM is volatile working memory, while ROM is non-volatile memory used for essential startup instructions.

  4. 4

    An operating system is system software that manages processor time, memory, files, devices, security, user accounts and the user interface; Windows, Linux, macOS, Android and iOS are standard examples to recognize.

  5. 5

    Internet and e-mail questions can test browsers, websites, URLs, search, attachments, CC/BCC, spam, phishing, malware attachments, HTTPS, strong passwords and safe logout from shared systems.

  6. 6

    MS Office revision should be tool-wise: Word for documents, Excel/spreadsheets for cells, formulas, functions and charts, and PowerPoint for slide presentations.

  7. 7

    Cyber security should be read around confidentiality, integrity and availability; common threats include malware, phishing and ransomware, and safe practice includes updates, backups, strong unique passwords and multi-factor authentication.

  8. 8

    E-services and AI are explicit 2026 syllabus areas: link e-services with Digital India, Aadhaar authentication, DigiLocker, e-Mitra and electronic records under the IT Act, 2000; link AI with data, pattern recognition, prediction, generative AI, risks and human verification.

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Computer characteristics and applications

A computer is an electronic, programmable data-processing system. In exam language, read it through the input-processing-output-storage cycle. Input is the data or command supplied through a keyboard, mouse, scanner, microphone, webcam, barcode reader or touchscreen. Processing is performed mainly by the CPU under stored software instructions. Output is the useful result shown or produced through a monitor, printer, speaker, projector or plotter. Storage keeps data, programs and results for later use.

The standard characteristics are speed, accuracy, diligence, storage capacity and versatility. Speed means the machine performs operations very quickly. Accuracy means it gives correct results when the data and instructions are correct; wrong input or wrong logic gives wrong output. Diligence means the machine can repeat the same instructed task without tiredness. Storage capacity means it can keep files, records, images, videos and programs. Versatility means the same computer can prepare a document, calculate marks, run a database, display a map, process a payment or play a training video. Automation means that once correct instructions and data are supplied, the system can continue the task with limited human intervention.

Applications should be revised through everyday public-service examples. In education, computers support online classes, digital notes, question banks and exam forms. In banking and finance, they support account records, ATMs, cards, digital payments and statements. In government offices, they support e-Mitra services, certificates, land records, pensions, recruitment forms and grievance portals. In health, they support registration, reports, telemedicine and hospital records. In business, they support billing, inventory, payroll, accounting and customer service. In agriculture, they support weather information, market information, soil records and subsidy records.

The exam trap is to separate strengths from limitations. A computer is fast and consistent, but it does not have independent common sense. It follows instructions and depends on power supply, hardware condition, software correctness, data quality and user skill. Therefore cyber safety, backups and correct data entry are part of practical computer knowledge, not a separate afterthought.

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