I spoke with a senior staff engineer about the design of a RAG system. The engineer works on an internal coding agent. The main problem is how the agent can retrieve the most relevant table/notebook when a user asks a data-related question. The discussion main...
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I was asked to design an in-memory key-value store and estimate its QPS load within 5 minutes. The interviewer, a male engineer, provided helpful hints and engaged in discussion. Follow-up questions included: How to save space? How to extend the storage durati...
I had a technical phone screen with a coding question similar to LeetCode 3484, there are a few parts of this question. 1. Implement `setCell` and `getCell` methods. The cells would only contain integer values, and I was asked to carefully consider the most su...
I received a prompt describing the coding exercise. It focuses on building and working with in-memory data structures, tracking state over time, and implementing clean, correct logic. The interviewer chooses from a pool of similar questions, and we code togeth...
I had a coding phone screen with two questions: 1. Kth Largest Element in an Array (LeetCode 215) 2. Subarray Sum Equals K (LeetCode 560) - variant I solved both questions quickly, but not without small syntax errors. For the first question, I had a follow-up...
I had a coding screen with Meta, and I was asked the following two questions: 1. Find the left and right side view of a binary tree. 2. Find the longest increasing path in a binary search tree. The follow-up was how to implement this in a regular binary tree,...
I had a technical phone screen that covered two main topics. **Coding:** I was asked to implement an in-memory database with `set` and `get` methods. The `get` method required a `sort_by` parameter. I needed to pay attention to edge cases. ``` class DB: def se...
I had to design an in-memory database. The key requirements were: * Support for data insertion. * Search based on column names. * Flexible schema, similar to DynamoDB, allowing arbitrary column definitions. * Data insertion supporting missing columns. After co...
I had four rounds of interviews. - Round 1: I was asked coding questions (LeetCode 593, 514, 7). - Round 2: I was asked to manually implement Linear Regression and Logistic Regression, and make them runnable. - Round 3: I had a behavioral discussion with the h...
The problem was to find the fastest mode of transportation to commute from 'S' to 'D' in a 2D city grid, minimizing commute time and cost, given time and cost matrices for available transportation modes. Only horizontal and vertical movement were allowed. I in...
