The AWS Certified Solutions Architect - Associate certification is a credential offered by Amazon Web Services (AWS) that validates an individual's expertise in designing and deploying scalable and reliable applications on the AWS platform. It is one of the most popular and widely recognized certifications in the cloud computing industry.

The Docker Certified Associate (DCA) certification is designed to validate a candidate's knowledge of Docker technologies and ensure they can demonstrate the skills and understanding needed to build, ship, and run applications in a Docker environment.

The Red Hat Certified System Administrator (RHCSA) certification. This certification validates the skills and knowledge necessary to manage Linux systems in a professional setting. RHCSA certification holders demonstrate their ability to perform essential Linux administration tasks, including file system management, user and group management, and network configuration. The certification also covers security, as well as essential command-line skills and server configurations.