Druva interview experience | Staff Software engineer -Development

Recently I got interviewed with Druva Pune. I'm having 2 years of software engineering experience with a FinTech. Round 1 :Recruiter contacted me on LinkedIn and shared a ...

Recently I got interviewed with Druva Pune. I'm having 2 years of software engineering experience with a FinTech.

Round 1 Recruiter contacted me on LinkedIn and shared a Test link on Mettl. Format of the exam : (Total time : 75 minutes) Section A- 3 programming questions . Allowed Language (JAVA,Python,C++) , all the questions were of easy-medium level. Section B- 3 sections containing 5 MCQs in each . These sections included questions on C++, Networking & OS and Algorithms and Data Structures respectively.

Round 2 (1 Hour) This was taken by a Senior Software Engineer . Q1. https://www.geeksforgeeks.org/dsa/reverse-alternate-k-nodes-in-a-singly-linked-list/ I explained the approach and coded on a google Doc shared between me and interviewer. Q2. https://www.geeksforgeeks.org/dsa/search-an-element-in-a-sorted-and-pivoted-array/ I explained the process .Interviewer got satisfied with the approach but time ran out while coding.

Round 3 (1 Hour) This round was taken by Principal Engineer. 1. Questions on Denial of Service (DOS) attack and how to prevent it. Questions on sticky sessions. 2. Design a rate limiter which only allows n requests from a particular user. Several approaches were discussed based on IP and user identifier. 3. Design a system which only allows n number of requests to each backend server (in a time frame of K units) and distributes the request . I provided a linkedlist implementation of Queue. With this approach the total number of requests currently processed by a server in last k unit of time can be found out in O(1). (Similar to continuous sum approach in an array) 4. Questions on Sharding and Consistent Hashing- in case of dynamic addition of new servers. 5. https://www.geeksforgeeks.org/problems/rearrange-characters4649/1 O(n)

approach for the above was expected .For coding a google Doc was shared.

Round 4 (1 Hour) This round was taken by Director of Engineering. (Hiring Manager) 1. Describe a challenging project you have done in your current organisation. 2.

Problem statement: An Api is given which is paginated. (Response will not come at once instead you have to call the api with different page numbers in query parameter). You have got K number of threads available write a code which calls this api and returns the whole response. The code should use atmost k threads and the use of these threads should be optimum. Several race conditions were discussed in this and finally with the help of interviewer I was able to code it. 3. https://www.geeksforgeeks.org/dsa/find-number-of-days-between-two-given-dates/ 4. https://www.geeksforgeeks.org/dsa/merge-two-binary-trees-node-sum/ Discussion on interests and reason for change.

Round 5 (1/2 hour) This was more of cultural fit round taken by Director of Product. Discussion on any one project , what are the challenges faced . Discussion from CV. Expectation from Druva etc. The interview process took around a total of 2 weeks. Final verdict selected :) I would like to thank GeeksForGeeks for providing various interview experiences and questions for preparation .