AI / Agentic AI Interview Questions
What is the difference between MRKL-style routing and end-to-end LLM reasoning?
MRKL-style systems route tasks to specialized tools or modules, separating natural language understanding from deterministic components rather than asking the LLM to reason through everything itself.
- A router decides which specialized tool or module should handle a given part of the task
- Deterministic components, like a calculator or a database query, handle the parts they're reliable at, rather than relying on the LLM to compute them
- Improves governability, since specific responsibilities are clearly separated rather than blended into one opaque reasoning process
End-to-end LLM reasoning, by contrast, asks the model to handle the entire task itself, which is more flexible but loses the reliability guarantees that come from delegating well-defined subtasks to deterministic tools.
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