The correct answer is option D, “All of the above.” A Database Management System (DBMS) query language is designed to serve various purposes, including supporting end users who use English-like commands, aiding in the development of complex application software, and specifying the structure of a database.

Let’s delve into the details of each option and why they are correct, followed by an explanation of why the other options are not accurate.

Option A:

Support end users who use English-like commands This option highlights one of the essential roles of a DBMS query language. It is designed to make it easier for end users, who may not have a technical background, to interact with a database. Most DBMS query languages, such as SQL (Structured Query Language), are designed to have a syntax that resembles English-like commands.

This user-friendly approach allows individuals to retrieve, manipulate, and manage data stored in a database without needing in-depth knowledge of programming languages or database internals. So, option A is correct because DBMS query languages are indeed crafted to support end users who use English-like commands to access and work with data.

Option B:

Support in the development of complex application software DBMS query languages play a crucial role in software development, particularly when building applications that need to interact with databases. These languages allow developers to create queries and commands that can be embedded within their application code to interact with the database.

By doing so, they can retrieve specific data, perform data modifications, and ensure data integrity within their applications. This simplifies the development process by providing a standardized and efficient way to interact with databases. As a result, option B is accurate because DBMS query languages are essential tools in the development of complex application software that relies on database functionality.

Option C:

Specify the structure of a database Another fundamental role of DBMS query languages is defining and specifying the structure of a database. Through these languages, database administrators and developers can create, modify, and manage database schemas, including tables, indexes, constraints, relationships, and data types.

They can use DDL (Data Definition Language) statements to define the database’s structure, ensuring that it aligns with the requirements of the application.

Specifying the structure of a database is a critical aspect of database management, as it establishes the framework for storing and organizing data effectively. Therefore, option C is accurate because DBMS query languages are used to specify and manage the structure of a database.

In summary, option D, “All of the above,” is the correct answer because a DBMS query language serves multiple purposes, including supporting end users with English-like commands, aiding in the development of complex application software, and specifying the structure of a database. Each of these functions is crucial in the context of database management and usage.

Now, let’s briefly discuss why the other options are not correct:

Option A:

Support end users who use English-like commands (Correct) Option B: Support in the development of complex application software (Correct) Option C: Specify the structure of a database (Correct)

All of the other options (A, B, and C) are correct, as explained above. Therefore, there are no reasons to consider them incorrect. Instead, they complement each other in describing the various roles and capabilities of a DBMS query language in the context of database management and usage.