Description: A file handler in Ruby is a class or module that manages file operations, allowing developers to interact with the file system efficiently and easily. This tool provides methods to open, read, write, and close files, as well as to manipulate their properties and manage exceptions that may arise during these operations. The flexibility of the file handler in general programming environments allows working with different types of files, whether they are text, binary, or even configuration files. Additionally, its integration with the exception handling system of the programming language facilitates error management, which is crucial for developing robust applications. In summary, the file handler is an essential part of the programming ecosystem, providing programmers with the necessary tools to perform data input and output operations effectively.