What are the advantages and disadvantages of analog data and digital data?

Answer 1

analog eats more power
analog is more realistic

obviously, digital takes the other end

Answer 2

The primary difference between analog and digital is the way it reproduced. Analog signals are wave shaped, the bigger the signal the louder the sound, the closer together the wave peaks are the higher the note. analog sounds are what we hear in the natural world. Audio cassettes are an example of analog data, each time you copy it to another tape some quality is lost because the tiny signal from the analog input needs to be amplified hence causing distortion. Eventually it is not worth listening to.

Digital data is made up of pulses which simply switch between on and off so when it is copied, it is not just amplified, the signal is used to flip a switch between off and on, which means quality is identical each time it is copied. The down side of this is that you get all or nothing, digital radio signals can be received or not. There is no in between like faint analog radio stations that may fade in and out.

Answer 3

Computers can only read digital, therefore if you have an analogue signal it has to be decoded in order to be read, thereby slowing down the access.

That's like when we used to use dial up modems, dial up uses analogue signal, so we need a modem (modulator/de-modulator) to change analogue signal to digital in order for the data to be read. Now days we use ADSL routers which receive digital data, therefore making it faster. (some products say ADSL modems, but that is incorrect since it does not need modulating/ de-modulating)