Google Professional Data Engineer is one of the most exciting and interesting exams I was aiming to pass. Over my career, I have worked mainly with database management until I realized something had happened – The RDBMS databases were no longer the inevitable choice for data management. As a Data Engineer, one is expected to work still with databases and streaming technologies, microservices, third-party APIs, data pipelines, big data technologies, etc. And back then, I had no idea what was happening. Therefore, what does one do when do not know…