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DCA

UNIT–I

  1. Brief History of Development of Computers.
  2. Computer System Concept.
  3. Computer System Characteristics/Features.
  4. Limitations of Computer.
  5. Types of Computers -Personal Computer (PCs) – IBM PCs, Types of PCs- Desktop, Laptop, Notebook, Palmtop, etc.
  6. Basic Components of a Computer System – Control Unit, ALU, Input / Output semiconductor Memory.
  7. Memory – Primary Vs. Secondary memory.

UNIT–II

  1. Input Devices : Keyboard, Mouse, Joystick, Scanners, Digital Camera, MICR, OCR, OMR, Light pen, Touch Screen.
  2. Output Devices.
  3. Monitors – Characteristics and types of monitor, Size, Resolution, Refresh Rate, Dot Pitch, Video Standard – VGA, SVGA, XGA etc.
  4. Printers – Daisy wheel, Dot Matrix, Inkjet, Laser.
  5. Plotter.

UNIT–III

  1. Various Storage Devices – Magnetic Disks, Hard Disk Drives, Floppy, Disks, Optical Disks.
  2. Computer Software, Need, Types of Software’s – System software, Application software System Software  Operating System, compiler, Assemblers, Interpreter.

UNIT–IV

  1. Operating Systems –Functions, Types- Batch, Single, Multiprogramming, Multiprocessing.
  2. Programming languages- Machine, Assembly, High Level, 4GL
  3. Application Software– Word-processing, Spreadsheet, Presentation Graphics, Data Base Management Software.
  4. Number System.
  5. Number System of computers- Binary, Octal, Hexadecimal, their conversion.
  6. Coding System – ASCII, EBCDIC

UNIT–V

  1. Direction of Transmissions Flow-Simplex, Half Duplex Full Duplex.
  2. Types of Network – LAN, WAN, MAN etc.
  3. Topology- Ring, Bus, Star, Mesh, and Tree topology.
  4. What is Virus ?
  5. Virus working principals.
  6. Types of viruses.
  7. Virus detection and Prevention Viruses on the network.