Question 028

### How can you ensure that a workflow called `Deploy Prod` is always running at most one at a time? > https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#concurrency 1. [x] Use `concurrency` on workflow level ```yaml concurrency: ${{ github.workflow }} ``` 1. [ ] Use `queue` on workflow level ```yaml queue: ${{ github.workflow }} ``` 1. [ ] Use `order` on workflow level ```yaml order: ${{ github.workflow }} ``` 1. [ ] Use `parallel` on workflow level ```yaml parallel: ${{ github.workflow }} ```