What is a database?

• A. A type of computer virus.
• B. A structured set of data held in a computer.
• C. A collection of unorganized documents.
• D. A method of data encryption.

Answer: (B)

A database is a structured set of data held in a computer. This definition emphasizes several key concepts. Firstly, databases are organized collections of information that allow for efficient data management, retrieval, and manipulation. They can store a vast amount of data in a systematic way, often utilizing tables, rows, and columns to structure this information logically.

Databases are designed to handle large volumes of data and support complex queries, making them essential for applications where data integrity and accessibility are critical. They are commonly used in various applications, from websites to enterprise systems, ensuring that data is not only stored but also can be efficiently accessed and updated. By organizing data systematically, databases enable users to perform operations such as sorting, filtering, and reporting, improving productivity and decision-making.

In contrast, the other choices do not accurately represent what a database is. A type of computer virus refers to malicious software, unorganized documents do not fit the structured nature of databases, and data encryption is a security method rather than a data storage solution.