# Workflow Component (Symfony)

> State machines, workflows, places, transitions, guards, event listeners, marking store

- 18 interview questions
- Mid-Level
- [Interview Questions: Symfony](https://sharpskill.dev/en/technologies/symfony/interview-questions.md)

## 1. What is a Workflow in Symfony?

**Answer**

A Workflow in Symfony is a process model that defines the steps (places) and actions (transitions) an object can follow. It manages complex flows where an object can potentially be in multiple states simultaneously, unlike a state machine. The Workflow is based on Petri net concepts and suits business processes with parallel paths.

## 2. What is the main difference between a Workflow and a State Machine in Symfony?

**Answer**

The fundamental difference lies in the number of simultaneous states possible. A State Machine allows only one active state at a time (single_state), ideal for linear flows like an order lifecycle. A Workflow allows multiple simultaneous states (multiple_state), suited for parallel processes like document validation by multiple departments.

## 3. How to define the Workflow type in Symfony's YAML configuration?

**Answer**

The workflow type is defined via the type option in YAML configuration under framework.workflows.[name]. The two possible values are workflow to allow multiple simultaneous states, or state_machine to allow only one active state. This choice automatically impacts the marking store type used.

## 15 more questions available

- What is a place in the context of Symfony's Workflow component?
- How to define a transition in Symfony's Workflow configuration?

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