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04 - Digital and Analogue

 1. The sound waves that your mouth produces when you speak are ____________ - the waves vary in a smooth way.

  digital

  analogue

  light particles

  watery

 2. An analogue signal is one which has a value that varies smoothly.
earlyyears_Analog-and-Digital-Signals.jpg

  FALSE

  TRUE

 3. Computers (and most other modern electronic devices such as cameras, mobile phones, etc.) are ?digital? devices because they ___________ in the form of numbers (digits).

  process data

  make waves

  hear sounds

  delete sounds

 4. Everything stored and processed inside a computer is a number (digital)

  TRUE

  FALSE

 5. Computers are unable to process analogues signals because they are digital devices.

  TRUE

  FALSE

 6. For digital devices such as computers, to work with analogue devices, _______________ is required?

  deletion

  subversion

  conversion

  wavification

 7. If you want to attach an analogue input device to a digital device such as a computer, you will need an analogue to digital convertor (ADC).

  FALSE

  TRUE

 8. A good example of a computer peripheral that requires an _____ is a microphone.
earlyyears_demo_analoguedigitalmic.png

  DAC

  Analogue register

  Digital switch

  ADC

 9. When you plug a microphone into a computer, you are actually plugging it into an ADC which converts the analogue signals from the microphone into _________ that the computer can then process.

  music

  letters

  waves

  digital data

 10. If you want to attach an analogue output device to a digital device such as a computer, you will need a digital to analogue convertor ______.

  DAC

  CAD

  ADC

  ADD

 11. Fill in the blanks for the following: 
A good example of a computer peripheral that requires a 
DAC is a __________________________. When you plug a 
loudspeaker into a computer, you are actually plugging 
it into a DAC, which takes digital data from the computer 
and converts it into analogue signals which the loudspeaker
 then converts into sound.

  off and on buttons

  loudspeaker or headphones

  plug or socket

  microphone or modem


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