IQVIA QA Engineer interview questions

Hi, I applied through HR mail id.I got call from HR she is nice and simple scheduled interview with in one day. I got very bad experience with Interviewer he was looking like angry man and wants to send people immediately out . On QTP for 2yrs EXP 1:Tell me about your self 2:write the function for opening the file,save and close but every time Unique 3.Find the length of the string without using len function 4.given alpha numeric string asked to write the code for extract only alphabets or numeric. You can leave for the day