Here are a few sample WSDL technical interview questions. Sample practice questions for written test and placement papers.
What do you understand by WSDL?

How is binding defined in WSDL?

How is a WSDL document defined?

What do you understand by disco file?

What is the use of binding element?

Why is the <portType> element used?

What do WSDL stand for?

Which directory of web service interface is explained by WSDL?