When to use Interactive (PTY) or Non-Interactive

[V Sidnal, Nagraju]

Dear All,

As LibSSH supports both, Interactive(PTY) and non-interactive approach to 
EXECUTE command on remote server/Machine.
I would like to know when to opt for Interactive or Non-interactive.?
On what  basis, we need to decide which one to opt for? What are the pro and 
cons?

Regards,
Nagraju