Q1: What is the Scrum Master's role in Agile development? What skills are required to be a good Scrum Master?

Answer: The Scrum Master is responsible for ensuring the correct implementation of the Scrum framework and facilitating the work of the team. His responsibilities include leading the team to Agile principles, removing barriers and ensuring that Scrum rituals are effective. Skills required for an effective Scrum Master include strong motivation and communication skills, leadership style, and a deep understanding of agile processes.

Q2: What is the purpose of the Agile retrospective meeting? How does it support continuous improvement?

Answer: A review is an ongoing activity where the team reflects on their work and identifies opportunities for improvement. It gives the team time to review what is and isn't working and how to improve their processes. Through regular backtesting, teams can identify conflicts, inefficiencies, and areas that can be changed to improve performance and deliver more value.

Q3: What is Infrastructure as Code (IaC) and how does it benefit DevOps practices?

Answer: Infrastructure as Code is an approach that uses code and automation tools to configure and manage infrastructure resources. It allows developers to define system requirements in code that can be modified, tested, and used with application code. IaC benefits DevOps practices by providing consistent, repeatable workflows, reducing manual errors, enabling faster service delivery, and facilitating better collaboration between development and operations teams.

Q4: What is blue-green deployment and how does it improve app reliability and usability?

Answer: Blue-green deployment is a software release strategy that runs two parallel environments, one active (blue) and the other idle (green). The active environment helps the production tools while the inactive environment is a copy of the production environment. This approach minimizes downtime and allows conflict to be resolved in case something goes wrong.

Blue-green deployment tests changes to the failover environment prior to migration, ensuring the reliability and availability of applications during release.

Q5: What is the role of automated testing in DevOps? How does it facilitate integration and delivery?

Answer:: Automated testing plays an important role in DevOps by providing quick feedback on code changes, optimization, and enabling integration and continuous delivery. Automated tests such as building tests, integration tests, and end-to-end tests can be integrated into CI/CD pipelines to validate code changes.

Using these metrics, developers can catch issues early in the development process, ensure consistent behavior, and reduce the risk of backlogs during active work.

Q6: What is Continuous Integration (CI) and how is it different from Continuous Deployment (CD)?

Answer: Continuous integration is the practice of combining code changes in a shared environment. It is designed to identify and resolve integration issues early in the development process.

Continuous deployment, on the other hand, goes a step further by successfully deploying and testing code changes to production.

Q7: What is the difference between Agile and Scrum?

Answer: Agile is a software development method that emphasizes iterative development, collaboration, and flexibility. Scrum, on the other hand, is a unique Agile framework that defines roles, rituals (such as daily stand-up and planning work) and structures (such as back-copying and reworking products) to manage and organize the development process.

Q8: What are the main concepts of DevOps?

Answer: The key elements of DevOps include:

- Collaboration and communication between development and operations teams.

- Automation of Systems and Infrastructure.

- Consolidation and continuous delivery.

- Infrastructure as code.

- Monitoring and feedback loops.

- Joint responsibility for quality and safety.

Q9: What is a microservice architecture and what are its advantages?

A: A microservice architecture is one in which an application is built as a collection of small, loosely distributed services that can be deployed independently. Advantages of microservice architecture include:

- Scalability: Individual services can scale themselves.

- Flexibility: Services can be developed, implemented and modified independently.

- Fault Isolation: A problem in one service does not affect other services.

- Technology Diversity: All services can be developed using different technologies.

- Continuous delivery: The service can be published and updated frequently.

Q10: What is the purpose of Kanban in agile development?

Answer: Kanban is a visual representation of work. His team sees and manages their work, from cause to success.

The board usually has lines representing different levels of work (e.g. to be done, done, completed) and cards representing individual employees. It promotes transparency, collaboration and efficiency.