there is no such thing that you will be asked for the accounting theory when you go on an interview with employees.If you go on an internview with employement angencies,it's likely that you will be asked to use the computer to answer questions regarding the accounting transactions (most of them are multiple choice questions).They will unlikely to ask you accounting theory.To employees,they more concerned about whether you know how to use the software
as well as if you have experience.To go on an interview,you'd better spend sometime to know something about the company,if it's possible.It would be helpfully if you can get the inside and know the software they use.Good Luck on your interview