Quick Overview

This question evaluates algorithm design and analysis skills across string processing (efficient substring search) and randomized/data-structure techniques (weighted random sampling with update considerations), testing time/space complexity reasoning and probabilistic thinking for large-scale inputs.

Implement substring search and weighted sampling

Company: Google

Role: Machine Learning Engineer

Category: Coding & Algorithms

Difficulty: medium

Interview Round: Technical Screen

Overview: This question evaluates algorithm design and analysis skills across string processing (efficient substring search) and randomized/data-structure techniques (weighted random sampling with update considerations), testing time/space complexity reasoning and probabilistic thinking for large-scale inputs.

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