Docker certifications represent vendor-level credentials focused on validating practical skills in container-based application development and operations. They typically cover core concepts such as container architecture, image creation and management, container networking and storage, orchestration fundamentals, security best practices, and troubleshooting in containerized environments. Exams commonly expect hands-on familiarity with command-line workflows, configuration of containerized services, and an understanding of how containers integrate into modern DevOps and cloud-native pipelines. Candidates are generally expected to have real-world experience rather than purely theoretical knowledge. These certifications often support career paths in software development, DevOps engineering, site reliability, cloud engineering, and platform operations, where managing, deploying, and maintaining containerized applications is a core responsibility across diverse infrastructure environments.