That's the reason all real IQ tests (not the ones you find on the internet, the real ones) are secret/closely guarded: Knowing the tests beforehand skews the results. So: yes, it is the same in that way and has been theorized as one of the reasons for the Flynn effect. Afaik there's also research into new types of IQ tests to mitigate this all the time, but a good IQ test has higher requirements than the typical interviewing test, so it takes longer.