The database is a collection of information that is organized so that it can be easily accessed, managed, and updated. In one view, databases can be classified according to types of content: bibliographic, full-text, numeric, and images.
D.B.M.S. stands for Database Management System which is a computer software application that interacts with the customers and other applications.
A database management system (DBMS) is a computer program (or more typically, a suite of them) designed to manage a database, a large set of structured data, and run operations on the data requested by numerous users.
You can name a few DBMS if you have used it before. I had used MySQL, Microsoft Access, Teradata (For Big data), etc.
The flowchart shows the complete flow of the system through symbols and diagrams. It makes it easy for the developer and all concerned people to understand the “flow” of the system. This diagrammatic representation illustrates a solution model to a given problem. A flowchart is a formalized graphic representation of a logic sequence, work or manufacturing process, organization chart, or similar formalized structure.
The purpose of a flow chart is to provide people with a common language or reference point when dealing with a project or process.
An empathy map is basically used by companies to get a deeper insight into their customers. Much like a user persona, an empathy map can represent a group of users, such as a customer segment. Empathy Map can represent a group of customers.