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 Glean.

What role is this question designed for?

This question is commonly asked for Software Engineer candidates at Glean during technical interviews.

Implement a Byte Pair Encoding (BPE) Tokenizer

Quick Overview

This question evaluates practical understanding of tokenization algorithms and string processing, specifically the iterative merge-based approach used in modern NLP systems. It tests algorithm design, frequency counting, and the ability to implement encode/decode symmetry — skills commonly assessed in coding interviews for roles involving language model infrastructure or search systems.

medium
Glean
Coding & Algorithms
Software Engineer

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