Sooner or later, they will ask you a technical question. Accounting standards are important, and they develop them all the time.
To say just, “yes, I have a knowledge of it”, would not help you, however, because this question have typically a second part. If you said you knew the standards, they would ask you something about them, for example, “explain the latest changes to IAS”.
It is impossible to know all accounting standards
Employers should know (and sometimes they really do know) that the accounting standards are difficult. While they can give you a practical question, they should not ask you something like, “tell me the content of IAS 19″.
Good accountant should be able to find what he needs for his job. But it is impossible to know everything. You should convince them that you have a good source (for example here) to check IAS (or IFSR) and to quickly find the correct updated information.
However, if you find some time to check the recent changes in the standards, and present them in an interview, it will be a big plus. Such a behavior demonstrates that you really care about your job, and keep your knowledge up to date.