If my phone is on “Do Not Disturb” mode or my volume is on silent, will I still hear alarms?

No, you will not hear alarms. If you wish to hear alarms, disable “Do Not Disturb” mode and make sure your volume is set to a level that you can hear. Additionally, you can enable "Do Not Disturb Override" in your phone's app settings to receive alarms when your phone is in "Do Not Disturb" mode.