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4
Build a Token Counter and Context Manager
CodingmediumVery Common
tokenizationcontext-managementllm
Reported
11 times
Last seen
2026-03-28
First seen
2025-05-20
Active in
2025, 2026
Description
Implement a tokenizer-aware context window manager that handles message truncation, priority ordering, and token budget allocation.
Approach Tips
Implement accurate token counting per message. Discuss truncation strategies: remove oldest messages first, but always preserve system prompt.
Sources
LeetCode·SDE-2·2026-03-28
Blind·SDE-3·2026-02-10
Glassdoor·Senior·2025-11-25
OA
OpenAI
AI
Typically appears in: Phone Screen
60 min — Coding problem focused on algorithms and systems thinking.