NVIDIA Software Developer interview questions

The interview ended earlier than it was supposed to be. Phone interview. Questions totally not related to my resume. Assumed I knew every language and asked very vague questions. One of the most difficult/uneasy interviews. Asked to code something using hashmaps. I never used hashmaps before so I told him I dont know hashmaps, asked three coding questions in hashmaps at a stretch. I mean if I dont know hashmaps, Im bound to not know all of them, so why not stop after the first one? Scripted questions not versatile.