Student or Learner
Is my sentence correct in speaking (not writing)?
Mistakes may exist at the connection between "him" and "was"
I asked him a question.
I asked him was he confident that he could arrive on time.
"if" or "whether" should be added where buggles indicated.
I really don't agree.
I asked him, "Are you..." as a direct quote.
I asked him if/whether he was... as an indirect quote.
The comma makes it no more correct.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
My comments refer only to conversation. If the speaker was telling a friend about a conversation he'd had with someone else, "I asked him (pause) was he confident......." although not good, seems acceptable enough.