OYO App Security interview questions

I uploaded my resume on Oyo website , this how I got the call form HR , then he scheduled my telephonic interview . Interviewer was really knowledgeable about the field . He asked so many questions and interview was so tough. It's was like 40 min interview more than stress busting session . If u applying for application security post u should know about network security , firewalls , coding ... Almost u should know everything .. Be prepare for all kind of questions ...coz as per interviewer u should know abt everything which is good .