The suffix "-is" indicates a disease or infection. For instance, bronchitis is an infection of the bronchial tubes, so psychosis is a disease of the psyche.
Pulpit usually refers to the speaking stand where a worship leader stands-- like a lectern. Sometimes that is a big fancy area. But one of the correct architectural/ecclesiological terms for the front of the sanctuary, where an altar would be located is the apse. Of course, most Christian denominations don't call it an altar, an altar is for sacrificing live animals or people. It's often referred to as a communion table, eucharistic table, that sort of thing.
It depends on the church. Catholic and Protestant churches view them differently. In Roman Catholic churches communion is according to the doctrine of transubstantiation, while in most Protestant churches it is an act of remembrance. The altar and the Eucharist table aren't considered the same thing in most Protestant churches, and in many Protestant churches they have both, used for different purposes.
You can have an apse w/o an altar, and an altar where there is no apse. What makes an apse an apse is a rounded half-circle recess in an otherwise flat wall. You can have an apse anywhere, a library, a museum, a courthouse, a kitchen, a stage, a hotel lobby.
Upstarts always have a quiz they think flops, that represents a real lapse in quality and perhaps was just a big oops with no upsides. Your quips indicate you not only feel this one's upstaged by other quizzes, but that it's downright dipshitty and belongs in the dumpster. I'm getting a glimpse of how upset this makes you. Just don't go all psycho!