Input Devices

• What is the main focus of this tutorial?

  Input devices of a computer
• What is the purpose of input devices?

  To send data to the central processing unit
• What is the most commonly found input device?

  Keyboard
• What is the function of a keyboard?

  To enter text into the computer
• What type of device is a mouse?

  A pointing device
• How does a joystick function?

  It controls video games in play zones
• What is a light pen used for?

  Highlighting text on CRT monitors
• How does a trackball differ from a mouse?

  You roll the ball instead of moving the device
• What is the primary function of a scanner?

  To capture images for editing
• What is a passport scanner designed for?

  Quick scanning of passports and IDs
• Where can you typically find passport scanners?

  Airports and hotel check-ins
• What is the function of a pen scanner?

  To enter printed text into the computer
• Why are pen scanners particularly useful?

  They reduce mistakes in text entry
• What does a barcode reader do?

  Reads and decodes printed barcodes
• What does OMR stand for?

  Optical Mark Recognition
• How are OMR sheets used in exams?

  For answering multiple choice questions
• What is the benefit of using an OMR reader?

  Instantaneous evaluation of answers
• What does a graphics tablet allow users to do?

  Hand draw images with a stylus
• What is a common use for webcams?

  Recording videos and live streaming
• What are the main input devices discussed in the tutorial?

  • Keyboard
  • Mouse
  • Joystick
  • Light pen
  • Trackball
  • Scanner
  • Passport scanner
  • Pen scanner
  • Barcode reader
  • OMR reader
  • Graphics tablet
  • Webcam
• What are the functions of the various input devices mentioned?

  • Keyboard: Enter text
  • Mouse: Control cursor
  • Joystick: Control video games
  • Light pen: Highlight text
  • Trackball: Move cursor by rolling
  • Scanner: Capture images
  • Passport scanner: Quick ID scanning
  • Pen scanner: Enter printed text
  • Barcode reader: Decode barcodes
  • OMR reader: Read exam sheets
  • Graphics tablet: Draw images
  • Webcam: Record videos
• Encoding


  Translating readable texts or values into a code that computers can understand.
• Decoding


  Reading and translating encoded data back into its original form.