This question is asked by interviewers to check your understanding of the role of a data engineer. They use a systematic approach to develop, test, and maintain data architectures. They align the architecture design keeping into consideration business requirements. They help in obtaining data from the right sources and after the formulation of data set processes, they store optimized data. They help to deploy machine learning and statistical models. They dive into data and help to develop pipelines to automate tasks where manual participation can be avoided. They help in simplifying the data cleansing process. They conduct research to address the issues and enhance data reliability, accuracy, flexibility, and quality.