Perfios Interview Experience For SDE (On-Campus)

Perfios conducted a Recruitment Drive in our college for the first time.
The process contained 4 rounds + 1 Aptitude Round. (Mine was online on campus)
Rounds may be offline or online depending on HR.

Aptitude Round

1. It consists of 20 Aptitude Questions
2. 3 DSA coding questions, it was easy to medium-level

• Beautiful Matrix
• Ron and Harry ( Here we have to print “YES” if it is possible to assign coins to Ron such that it is always greater than Harry and the difference between Ron and Harry is 1, else “NO” ;
• Find the count of the subset whose sum lies between the given range (L and R).
  

1st Technical Round

• It started with my introduction .
• Pillers of OOPS, polymorphism, and its type .
• In my portfolio, here I was shown my portfolio and he asked me to explain how a specific component was made, what tag or attribute and CSS you have used to create that component, and so on.
• At the end, I was asked to explain the sorting algorithm on Notepad.
  

2nd Technical Round

• It started with OOPS, then what threading, multiprocessing, and basic questions related to that.
• I was asked to share my screen and do a DSA question based on the hashmap, I was also asked how this hashmap works internally and some code-related questions like (why, how, and use cases);

3rd Technical Round

• It was not that difficult, since it was based on the tech stack you have used to create your project and why do prefer using this stack only why not others?
• TCP and UDP concept.
• Some real-time API uses and challenges faced while fetching data. How will you handle the redundant data being fetched from different APIs?

HR Round

It was a basic HR question about your background, what you want to do at Perfios, Questions on college, why did you chose this college, etc.