ART MEDICAL interview questions

good. very nice pepole 1. give list of 4 design pattern 2. how to implement a singelton 3. how to implement a mirror binary tree 4. how to implement a water gauge counter

The interviewer asked me some 'pen and paper' questions on a face to face interview. He was impatient, when I was thinking outloud he always confronted me with what I previously said, and I could not think. I felt total discommunication during the interview, and after the interview I told them that I will not continue the process.