What does it mean for interest to only be credited at the end of each interest conversion period?

I have an example where someone deposits R1000 and lets it accumulate at a nominal rate of 6% convertible semiannually but interest is only credited at the end of each period (I assume that's every half-year?). How does this change the calculation?

Since the interest conversion period is half-yearly, then the question is only describing interest conversion at the end of each 6 month period (not beginning of the period).