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# Bharti SoftBank (Hike) Interview Experience | Set 7 (For SDE)

First Round Written Test(75 minutes)

1. 1. 20 MCQ questions based on DBMS, OS, Outputs, Data Structure.
2. 2. Two coding questions :
a. Minimum Number of Platforms Required for a Railway/Bus Station
b. Maximum difference between two elements such that larger element appears after the smaller number/
3.
F2F Interviews
Round 1 đ 45-50 minutes)
1. Asked my approach of written coding questions and asked to optimize if possible.
2. Given k lists of different sizes having some integers, find the minimum range [l, r] such that atleast one integer from each list should come in that range.

Round 2(Pen & Paper) : (30 minutes)
1. Write an algorithm for converting bst to sorted doubly link list.

Round 3 : (1 hour)
1. About my Summer Intern project and semester projects.
3. Some questions on Database querying like caching and in disk querying and asked me to design a query solving system for the use case when millions of queries are coming per second.
4. One puzzle of red and blue balls, I told him that I know the solution.
5. One simple DP question to find the number of ways to reach n if 1 or 2 steps are allowed, I said I have already solved a good version of this question if 1 to m steps are allowed using simple DP. He smiled and said I am not going to ask any questions you are going to the next round. And admired me for my honesty.
Round 4 : (1:30 hour)
1. Implement a queue using stacks with O(1) enqueue as well as O(1) dequeue.
2. Implement URL shortener.
3. Nut bolt problem, I said I have already solved this earlier. But he still asked me the approach and I had given O(nlogn) approach.
4. Multiple Threads are updating a stack concurrently then what is the problem and how to deal with it.
5. Semaphore and its uses in real-life scenarios.
6. Egg floor puzzle. I told him that I know the solution.
8. Hashing and B tree and which is better and why and asked for the use cases also when the particular is better.

Telephonic :
Round 5: (CTO round) (15 minutes)
1. Why do you want to work at hike ?
2. About my Summer Intern project.
3. One data base design question and asked me about the data structures that I would use for the particular use case and why and then optimize.
Round 6: (CEO round) : (10 minutes)Proper HR questions.

Round 7 (HR) : (6 minutes)
1. About my Summer Intern project (general overview).
2. Discussion about the full time + intern offer and about the new office and work culture stuff.

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My Personal Notes arrow_drop_up