It means: How is school?
simply, Desu. eg. who are you? - anata wa dare desu ka? where are you? - anata wa doko desu ka? are you ill? - anata wa byouki desu ka? are they new? - arera wa atarashii desu ka? ect. Desu means: Are, Is, and am.
The phrase 'gomen nasai, wakarimasen' means "I'm sorry, I don't understand." 'Dou desu ka' means "How is it/how about it".
who are you eating with
"Ogenki desu ka?" is a Japanese greeting that translates to "How are you?" It is a way to inquire about someone's well-being.
"Toire wa doko desu ka?" is a Japanese phrase and in English it means "Where is the bathroom? Where is the toilet?"
It means "What page [is it]?"
This can generally be translated as: (by line) O genki desu ka? How are you? Watashi ha genki desu. I am well. Anata ha daijoubu desu ka? Are you all right?
genki desu ka or ikaga desu ka
This means "Is the cat small?"
It means "is this a book?".
Nansai desu ka? Means what year is/was it? Nan=what Sai=year Desu=to be(is/was) Ka=questions particle. Its literal translation is "what year is?" the subject that you are talking about is implied by the context of the conversation.
'Do you like him?'