I just grepped through a 250,000 line project on my system and I had only used the modulus operator six times.
I'd still expect a programmer to know it but that should be tempered by the fact there will be parts of the technology stack you are intimately familiar with that another person might barely use and vice versa.
I'd still expect a programmer to know it but that should be tempered by the fact there will be parts of the technology stack you are intimately familiar with that another person might barely use and vice versa.