My interview went around for 45-50 minutes.

1. first the interviewer gave her intro, then asked me to introduce. She was having an experience of 17 years and was a cloud solution architect.
2. I gave my intro, now she started giving me question. Starting with basics.
   The questions were as follows :

• difference between hashmaps and cache
• what is hashing?
• can we de-hash a hashed string?
• what is process and thread?
• can processes share the same memory?
• follow up : can threads follow the same memory?
• what is virtual memory?
• follow up : why then virutal memory ? we could have increased the ram simply.
  -> now she started to ask a little bit from system design and cloud(as I mentioned aws in my resume)
• what is monolithic services?
• what is microservices?
• what is distributed systems?
• say something on cloud architectures : I couldn't answer as I am currently exploring only.
• what is load balancing?
• what is fault tolerance? what's CAP?
• follow up : what does it provide : availability
• explain SOLID design principles : explained about all the 5 design patterns with detail explanation where each principle can be used and keeping modularity in mind.
• what is tcp?
• layers of tcp.
• what is rest? why is it called restful apis?
• have you heard about soap? explain.
• what is aws ec2 ?
• what services we can make use of using ec2 instances?
• what is docker why do we need it?
• what is paging?

-> Now came the DSA Question.
You are given two strings(say BEAR and BARE). You need to find if they are anagrams or not.

• Seeing the question hashmaps clicked my mind, and I came up with the solution within 2 minutes, she asked me to code on NOTEPAD and it hardly took me 2 minute to code as I was in practice.
• used O(N) time complexity and O(N) space complexity.
• Now she asked me to use without hashmaps, again as soon she said no space, sorting clicked my mind, then I explained the intuition of my solution using sorting. I asked if I need to code that but she was happy with my explanation so she said that's not needed.
  • Follow up questions on space and time complexity :
• what is space and time complexity.
• I explained all time complexities : big oh, big omega and big theta and why they are used, etc.

Any questions for her from my side :

• I told her that I am exploring cloud computing, what should I learn first and where from if any resource which she followed.
• asked about philips and it's internal working.

Also I couldn't answer 2 questions that was from paging and cloud computing. I told her that I am currently exploring those topics so I am not confident.

Managerial round was completely based on projects normal discussion on relocation and about college exams.