Which of the following options is a common standard file format for executables, object code, and shared libraries for UNIX-based systems?

The common standard file format for executables, object code, and shared libraries used in UNIX-based systems is the Executable and Linkable Format (ELF). This format has become the standard on Linux and UNIX-like operating systems due to its flexibility and support for various architectures. ELF files can contain both executable and shared library content, allowing for dynamic linking and execution. This functionality is crucial in UNIX systems for running applications and managing dependencies between libraries efficiently.

In addition to its support for multiple architectures, the ELF format also includes features such as sections and segments that define how the operating system loads the file, making it well-suited for diverse environments. This adaptability and comprehensive structure enable developers to create robust applications that can run seamlessly across different UNIX-like platforms.

The other file formats listed have distinct characteristics and are used in different environments. PE (Portable Executable) is primarily associated with Windows operating systems; COFF (Common Object File Format) is an earlier format that is used in some UNIX implementations but is less common today, and GUID (Globally Unique Identifier) refers to an identifier format rather than a file format for executables.