For Salesforce API Enterprise WSDL is strongly typed and Partner WSDL is loosely typed.
Q1.What does this exactly means and how to test this behavior?
Q2.Where can we use Enterprise/Partner wsdl and why?
Q3.What are the advantages of using Partner wsdl over Enterprise wsdl?
Q3.What will happen if we just only use Partner wsdl instead of using Enterprise wsdl?

For Salesforce API Enterprise WSDL is strongly typed and Partner WSDL is loosely typed.
Q1.What does this exactly means and how to test this behavior?
Q2.Where can we use Enterprise/Partner wsdl and why?
Q3.What are the advantages of using Partner wsdl over Enterprise wsdl?
Q3.What will happen if we just only use Partner wsdl instead of using Enterprise wsdl?