What is the purpose of checking for 'parasitic draw' on a motorcycle battery, and what multimeter setting is used?

1. To measure spark plug secondary resistance; measured in Kilohms
2. To measure current drain when the ignition is switched off; measured in DC Amps (milliamps)
3. To check starter motor draw; measured in DC Volts
4. To check the charging output of the alternator; measured in AC Volts