"Business systems analysts work closely with a company's IT systems to optimize operations and maximize its business performance. Employers are looking for candidates with a combination of excellent IT and communication skills as well as an understanding of how the company conducts its business. In preparation for an interview, be ready to discuss your ability to manage multiple projects at once, offer advice around resource allocation, and influence clients to follow your recommendations."
How do you handle irate clients that are having technical trobules and need to work immediately.
Refrain from using technical jargon when explaining technical problems and solutions to clients and speak confidently.
Approach the situation with 'we' working on the issue. Know that your are there to help solve this and act towards that, being calm and accurate towards solution. Even if the solution is that you will have to find out more and have to return to solve this issue.
Ask for the ip address, then ask if it is an on or near-air emergency. Ask for the symptoms and if others are experiencing the same problem. If no one else is then have them jump on another pc if possible/feasible. Remote into the pc or tx the ip to the relevant trouble-shooter.