"A szakács az olasz étteremnél főz?"

Translation: Is the cook cooking at the Italian restaurant?

[basszus-kulcs]

what is the difference between the "at the" and "by the"?

[Bilegdembe]

Probably we have to think that the cook is cooking inside so choosing at the is a better choice

[Matt_legrek]

both should be accepted

[KrisWD]

When it comes to places, how do we decide when to use -ben/-ban and when -nél/-nál?

[Wazav94]

'-ban, -ben' means inside something and '-nál, -nél' means close to something as a reference point. I suppose there are many exceptions but I think '-ban, -ben' is translated 'in' and '-nál, -nél' is translated 'by' in most cases (even in abstract phrases, for example 'in most cases'-'a legtöbb esetben')

[Forzafiori]

could this not mean "does the cook cook at the italian restaurant?" A bit awkward in English but it's a technically correct sentence.