AI / Agentic AI Interview Questions
What is the Plan-and-Execute pattern?
Plan-and-Execute is an agent architecture where the agent generates a complete plan upfront, then works through each step of that plan sequentially, rather than re-reasoning from scratch after every single action.
- Produces the full sequence of steps needed to reach a goal before taking the first action
- Executes steps largely without repeated re-planning cycles, unless something unexpected happens
- Uses noticeably fewer tokens than ReAct on multi-step tasks, since it avoids a reasoning cycle before every single action
The trade-off is adaptability, because the plan is fixed upfront, a Plan-and-Execute agent is less naturally suited to tasks that need constant re-evaluation as conditions change mid-task.
When is the full plan generated in this pattern?
What trade-off does this pattern accept in exchange for token efficiency?
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