Unit 1.1_1.4 Digital

A quantity having discrete numerical values is

• an analog quantity

• a digital quantity

• a binary quantity

• a natural quantity

The term bit means

• a small amount of data

• a 1 or a 0

• binary digit

• both answers (b) and (c)

The time interval between the 50% points on the rising and falling edges is

• rise time

• fall time

• pulse width

• period

A pulse in a certain waveform has a frequency of 50 Hz. It repeats itself every

• 1 ms

• 20 ms

• 50 ms

• 100 ms

In a certain digital waveform, the period is four times the pulse width. The duty cycle is

• 25%

• 50%

• 75%

• 100%

An inverter

• performs the NOT operation

• changes a HIGH to a LOW

• changes a LOW to a HIGH

• does all of the above

The output of an OR gate is LOW when

• any input is HIGH

• all inputs are HIGH

• no inputs are HIGH

• Both (a) and (b)

The output of an AND gate is LOW when

• any input is LOW

• all inputs are HIGH

• no inputs are HIGH

• Both (a) and (c)