How do I practice coding and algorithm questions?

Use PracHub's coding console to write, test, and debug your solutions in Python or JavaScript. View hints, test against sample inputs, and compare with official solutions.

What difficulty level is this coding question?

This is a medium difficulty Coding & Algorithms question, commonly asked during Technical Screen rounds at Google.

What role is this question designed for?

This question is commonly asked for Machine Learning Engineer candidates at Google during technical interviews.

Implement substring search and weighted sampling

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.

Quick Overview

medium
Google
Coding & Algorithms
Machine Learning Engineer

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