Are these statements about Analog-to-digital and DAC correct?

Question

I've been studying about these for a while and I read a few statements online that I'm not sure are accurate. Can you people just tell me if it's true or false?

1) An analog-to-digital converter (abbreviated ADC, A/D or A to D) is a device which converts continuous signals to discrete digital numbers.

2) An analog-to-digital; converter is a device for converting a digital (usually binary) code to an analog signal (current, voltage or electric charge.)

3) Instead of impulses, usually the sequence of numbers updates the analogue voltage at uniform sampling intervals.

4) Video signals from a digital source, such as a computer, must be converted to digital form if they are to be displayed on an analog monitor.

5) The Oversampling DAC is the simplest DAC type.

Thank you for your time and knowledge.

Answer 1

2) An analog-to-digital; converter is a device for converting a digital (usually binary) code to an analog signal (current, voltage or electric charge.) You need to state, a digital to analog converter is a device....

3) is fine

4) is wrong.Video signals from a source, such as a computer, must be converted to digital form for transmission and converted back to analog if they are to be displayed on an analog monitor.

5...... I have not heard of oversampling DAC. there is an oversampling ADC and is called delta sigma ADC. So change DAC to ADC. However it is not the simplest. the simplest ADC is possibly, the dual slope ADC

Answer 2

2 and 4 are wrong as stated.

Answer 3

1 true

2 false (duh) unless it meant to say digital-to-analog converter, in which case it's true

3 not sure what this is talking about. ADCs have a sampling interval. DAC specifications usually talk about a conversion rate (despite what wikipedia says). Whether impulses are involved depends on the type of DAC.

4 false (duh)

5 false, per wikipedia