Q about flash tuning

Hi im new here and i have some questions about flash tuning with my humble knowledge i did study automotive software engineering subject in my degree i ran into these questions hoping someone can help me with them to get a better understanding of it

When using reflash tuning do i get live data from the car same as standalone or standalone can have more parameters to help more with better tuning? and in reflash tuning when parameter settings that are changed during the session does it interrupt the drive program or just change on the fly in other words the setting or changing of parameters, and the simultaneous execution of control and monitoring functions is possible with reflash tuning?