In this chapter, we covered a couple of great languages. We have looked at their complete runtime environment, deployment commands, service graphs, and a cheat sheet for easy reference. We also defined how important these languages are in the existing cloud era, where everything is being converted to API endpoints and REST. These languages are very important from an SRE point of view, as we can easily see how communication happens between various endpoints and services in the cloud environment. This helps with the planning, implementing, and real-time troubleshooting of applications. 

In the next chapter we will be leaning about the best practices included in Realizing Reliable Systems.