"Prospective employers hire Salesforce administrators to ensure that the Salesforce platform is operating properly through their project management, presentation, and communication skills. In an interview context, expect to be questioned on how you would use Salesforce to approach problems and improve upon processes. Come prepared to talk about your past projects that involved Salesforce, as well as how you plan to train employees who are unfamiliar with using this platform. Companies are ultimately looking for Salesforce administrators that will be a team player through creating a more efficient and easier environment to work in."
How would you handle a project where no one really knows what they need or what exactly is wrong? In which it's difficult to get answers for the questions you asked due to lack of communication.
It's all about starting with vague questions: What's not being accomplished, What's the bottle neck, etc.; before moving on to specifics. Ask the same question to as many people as possible to get the best answer.