WalMart SDE III | Bangalore

Round 1

Questions:

1. Duplicates within the k range.
   It was like I needed to check if the element repeats with the next k elements or not.
2. Trapping rain water.
3. Was given string like this 👉 "Service1 - API1- 10 Service2 - API1- 8 Service3 - API2- 8 Service2 - API2- 12 Service2 - API3– 5", and was asked to calculate the average latency for each API.

Candidate's Approach

No approach provided.

Interviewer's Feedback

The round lasted for around 1 hour and 40 minutes. For the first question, the interviewer was looking for some specific solution.

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Round 2

Questions:

1. What APIs have you worked on in the current project?
2. Implementation of SET using primitive datatypes.
3. How to create an idempotent POST API?

Candidate's Approach

No approach provided.

Interviewer's Feedback

Solved everything, the round lasted for around 40 minutes only.

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Round 3 (HM Round)

Questions:

1. Design some generic API that would serve multiple requests.
2. Difference between PUT and POST.
3. Difference between HTTP and HTTPS, what makes HTTPS more secure.
4. How do you optimize SQL queries?
5. A variation in the COIN CHANGE problem, needed just an approach to solve the question.
6. What should be the ideal number of partitions?

Candidate's Approach

No approach provided.

Interviewer's Feedback

Got around 80% of the correct answers.

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