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Level: Staff-Level
Round: Phone Screen · Type: Coding · Difficulty: 6/10 · Duration: 60 min · Interviewer: Neutral
Topics: String Manipulation, Data Structures, Optimization
Location: San Francisco Bay Area
Interview date: 2025-12-31
Got offer: False
This phone screen focused on string manipulation and generator implementation.
The interview was divided into parts.
The first part involved receiving a string and a vocabulary of stop words. The task was to return the portion of the string before the first stop word, which could appear anywhere in the string. I was advised to prioritize simplicity over optimization and confirm requirements with the interviewer to save time.
The second part involved processing a large string that could only be accessed in chunks. Using Python, I needed to implement a generator. Since I wasn't very familiar with generator semantics, my implementation was slow. I should have been more practiced with generators.
I anticipate that subsequent parts might have involved further optimization using data structures like tries.