The coding question I received was: Implement a weighted cache with the following requirements: - Implement `get` and `put` operations. - The cache has a total weight limit. - When the limit is reached, the key-value pair with the largest weight should be remo...
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## Preparation Tips & Key Takeaways ### What I Learned - Aligning my answers with the company's value memo is crucial for behavioral questions. - Understanding the fundamentals of data modeling and system design for ad tech is essential. ### Recommended Prepar...
The coding question I got involved finding duplicate numbers: L1: Given a series of viewing IDs, return True if there are any duplicate views, otherwise return False. Example: [4, 5, 100, 200, 5] -> True. L2: Return True if there are any duplicate views within...
The interview process included a recruiter call, a phone screen, an initial hiring manager interview, and then a series of onsite interviews, followed by a second hiring manager interview. **Recruiter Call:** This was a simple introduction and background check...
## Preparation Tips & Key Takeaways ### What I Learned - I should have clarified the input structure more precisely before jumping into the coding implementation. - Writing comprehensive unit tests, especially for complex scenarios, is crucial but time-consumi...
My onsite interview for a Data Engineer role included the following: **General Coding:** The difficulty was between LeetCode Easy and Medium. I'm not sure if it qualifies as an algorithm question. * Merge Intervals * Word Count: Given a long sentence, list the...
I had a phone screen with two coding questions: 1. **Interval Intersection Variant:** The problem involved finding the maximum number of overlapping intervals. There were two follow-up questions: * Find the number of overlaps at a given time. * Given a time pa...
I interviewed for an ad-related team. **Phone Screen:** I was asked LeetCode 636. **Virtual Onsite:** I had a system design round where I needed to design a system for promoting ads, including defining the DB schema. I was told to focus on their specific syste...
The question was similar to a variation of the LRU cache. The requirement was to avoid outputting identical logs within a short time frame (a time range was provided). There were many follow-up questions, such as how to delete data, how to handle concurrency,...
### Round 1: High Concurrency I was asked to design a class that would allow multiple users to report their latency. The system should then calculate and report the 99th percentile latency over a given period. ### Round 2: Coding I had to write code to process...
