Which description best matches containerization?

• A. Package manager
• B. Code repository
• C. Containerization
• D. Virtual machine

Answer: (C)

Containerization packages an application together with its libraries, runtime, and configuration into a self-contained unit that can run the same way in different environments. This relies on OS-level virtualization, where containers share the host OS kernel but keep processes isolated from one another, making them lightweight and fast to start compared with full virtual machines that require separate operating systems. This isolation and portability across environments is what defines containerization. It’s not a package manager (which handles installing software inside an operating system), not a code repository (which stores and manages source code), and not a virtual machine (which emulates hardware and runs a separate OS).