Final answer:
The back-end engine that manages various database operations is the Database server. It is essential for creating, updating, searching, and deleting the data while other options provided serve different functions in the database ecosystem. so, option B is the correct answer.
Step-by-step explanation:
The database piece that acts as a back-end engine, which knows how to create, update, search, and delete database files, is B) Database server. A database server provides the necessary functionality to handle data manipulation and storage. It interacts with user queries and applications through a database management system (DBMS), which processes the requests and instructs the server on how to deal with the data. Other options provided such as SQL query, data entry form, and data analysis software have their distinct roles, but the database server is the actual system that does the heavy lifting in terms of managing and operating the database files behind the scenes.
A database server is a software application that manages and controls access to a database. It provides the necessary functionality to store, retrieve, and manage data. This server is responsible for handling SQL queries, executing them, and performing the necessary operations on the database files.
For example, in the context of SQL, a popular language for managing databases, you would use SQL queries to communicate with the database server and instruct it to perform operations such as creating tables, updating records, searching for specific data, and deleting entries.