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Introduction to touchscreen devices

Touchscreens are both an input and output device. They allow input from the user through the use of a touch sensitive surface on the screen. They also output data to the user, such as displaying the home screen of a phone or displaying a number pad for the users to press the digits on.

Source: WIkipedia

How they work

Pros and cons

Pros and Cons of touch screens

Advantages of touchscreens

  • They are incredibly intuitive to use, so much so that even babies can use them.
  • They don’t require a separate piece of hardware
  • They are faster to interact with than mice.
  • They can be used to perform complex interactions, such as pinch-zoom, two finger rotate.


Disadvantages of touchscreens

  • Mice are far more accurate then touchscreens, due to the size of your finger.
  • They don’t work well when wet or when you are wearing gloves
  • The are less durable than non-touch screens
  • Onscreen keyboards can take up a lot of space on the screen



Past Paper Questions

0478/12 Paper 1 Theory May/June 2015 – Qn2