Input Combinations and Preconditions
Let us start by Understanding Input Combinations and Preconditions. A very fundamental problem with software testing is that testing under all combinations of inputs and preconditions is not feasible, even with a simple product. Moreover, the number of defects in a software product can be very large and defects that occur infrequently are difficult to find in testing. More significantly, non-functional dimensions of quality (how it is supposed to be versus what it is supposed to do)—usability, scalability, performance, compatibility, reliability—can be highly subjective; something that constitutes sufficient value to one person may be intolerable to another.
A great career is just a certification away. So, practice and start Understanding Input Combinations and Preconditions to become Certified SoapUI Testing Professional