Default RF/UI Screen Parameter Values when left blank

Summary: Can you clarify what are the default values for the RF screen or Company/Facility parameters available at the link below when they are left blank?

https://support.oracle.com/epmos/main/downloadattachmentprocessor?parent=DOCUMENT&sourceId=2959863.1&attachid=2959863.1:RF-SCREEN-PARAM-23C&clickstream=yes

https://support.oracle.com/epmos/main/downloadattachmentprocessor?parent=DOCUMENT&sourceId=2959863.1&attachid=2959863.1:COMP_FAC_PARAMETERS&clickstream=yes

For example, if Prompt Dock Door parameter is left blank on Receive {lpn} Shipment RF screen, what default behavior is expected (Prompt or Do Not Prompt)?

Another example is, if ALLOW_LOWER_CASE_SERIAL_NBR company parameter is left blank, what default behavior is expected (Yes or No)?