The web services is covered under the exam objective No. 4, you can find the full exam objectives at BEA WebLogic Server 7 Enterprise Developer Certification Test 4.Design and build Web services Describe the basic concepts of Web services such as advantages of them and what support WebLogic provides for them Implement basic Web services Understand and implement clients that access Web services
I think about 4-5 questions in the exam are on Web services. The simulator provides about 30-35 questions on Web services alone. In addition there are revision notes for last minute revision before the exam.