what is dependencies exist?

Your question doesn't make any sense to me. Please reword it to make it clearer.

I apologize for the confusion. If you are asking about what it means for dependencies to exist, in the context of software development, dependencies refer to the external libraries, frameworks, or modules that a particular piece of software relies on to function correctly. These dependencies need to be present and accessible in order for the software to work properly.

To determine what dependencies exist for a given software project, you can typically start by examining the project's documentation or source code. The documentation may explicitly list the dependencies or provide instructions on how to find them. Additionally, most modern software development practices utilize package managers, which are tools that manage and install dependencies for a project. Package managers often have commands or configuration files that indicate what dependencies are required and how to install them. By consulting the project's package manager configuration file or running relevant commands, you can identify the specific dependencies.

In summary, dependencies exist in software development to provide necessary functionality and are typically documented, indicated through package managers, or found in the project's source code.