Questions to Determine Spring / Spring Security, etc Knowledge

I requested Spring / Spring Security, etc training at work, and the bosses want to hire someone who knows Spring to come work with us as a consultant so that we'll learn Spring from a real-world perspective instead of a training perspective.

I've been tasked with coming up with questions of various difficulty to ask potential hires in order to ascertain their Spring ability. The problem is that I don't fully understand Spring yet (hence the training request).

What questions wo开发者_开发技巧uld you ask someone to determine their Spring ability, and what level of knowledge would someone have to have of Spring to answer them? (I need 2 "easy" questions, 2 "medium" questions and 2 "hard" questions, specifically, but I'll take anything you guys have).

I suggest to hire someone who is a 'SpringSource Certified Spring Professional' if you can do that or at least someone who has completed the 'Core Spring' course.

As for the questions, there are some easy/medium sample questions (with answers) on the certificate page.

During the interview I would ask the candidate to explain some real-world situations where, how and why he/she has used Spring before.

Easy: Spring originally arose as a reaction to what technology? How does its philosophy compare?

Easy: Describe a situation where you improved a project with Spring? Which parts of Spring did you use?

Medium: Describe the facets of an application for which Spring supplies a solution. (looking for: dependency injection, transactions, distributed computing, etc)

Here an easy one : What is Dependency Injection ?