NVIDIA Software Engineer interview questions

Phone interviews were done by the Software director and Senior Manager. Tested basically on my academic background. On-site interview consisted of a panel of 7 people. Each of them testing me in different areas of my expertise and academic background. you tend to get very tired and come under some pressure.

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.