Hi, I got a few questions that I need an explanation. please don't just copy-paste the definition from google give me a 4-5 sentence explanation, maybe throw some links for reference. Thanks

1) Have you worked with Executor frameworks? What is that?2

2) What is the difference between a hash map and a treemap?

3) What technology did you use for Web Service calls? How do you generate the SOAP service or client?

4) Using the SOAP client how do you connect with the SOAP Service?

5) How do you handle Security in SOAP?