The coding question I got was: ```python class AutoExpireCache: def __init__(self): def set(self, key, value, timestamp, expire_period): def get(self, key): ``` **My approach:** 1. I implemented the basic `set` and `get` APIs using a dictionary. 2. I discussed...
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The interview focused on the design and implementation of a log-based rate limiter. I needed to discuss the core implementation, potential issues with large data volumes or long runtimes, and the data deletion process. I implemented the data deletion part duri...
The multiple-choice questions covered the basics of machine learning, including the difference between Recall and Precision, probability calculations, basic loss function derivatives (basic content learned in Machine Learning courses), and Overfitting and Unde...
I should have started coding immediately without hesitation. The time was very limited. For SQL questions, I need to practice writing efficient queries using window functions and CTEs.
## Preparation Tips & Key Takeaways ### What I Learned - I need to gain experience designing ML job schedulers. - It's important to balance service-level discussions with feature engineering and evaluation during system design interviews. ### Recommended Prepa...
## Preparation Tips & Key Takeaways ### What I Learned - The importance of being able to adapt known algorithm problems. - Recommendation system design requires understanding of system design principles and potential user needs. ### Recommended Preparation ###...
The coding question I received was: Implement a print function. The input consists of events, each with a name and timestamp. If an event with the same name occurs within 1 minute, print it only once. I initially used a hash map to store the event names and th...
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...
## 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...
