Podcast
Questions and Answers
What is the main purpose of the Twelve-Factor methodology?
What is the main purpose of the Twelve-Factor methodology?
- To provide a framework for constructing applications optimized for cloud environments. (correct)
- To offer a guide for developing traditional monolithic applications.
- To simplify the process of building desktop applications.
- To ensure applications are suitable for mobile devices.
What is emphasized in the Twelve-Factor methodology regarding deployment environments?
What is emphasized in the Twelve-Factor methodology regarding deployment environments?
- Portability across different environments is essential. (correct)
- All environments must be identical.
- No specific environments are required for deployment.
- Code should only be deployed in production environments.
Which factor ensures that an application has a single codebase?
Which factor ensures that an application has a single codebase?
- Factor 1: Code Base (correct)
- Factor 4: Backing Services
- Factor 2: Dependencies
- Factor 3: Configuration
What should configuration values, such as database credentials, be stored in?
What should configuration values, such as database credentials, be stored in?
Why is it important for dependencies to be explicitly declared?
Why is it important for dependencies to be explicitly declared?
What happens if multiple codebases are used for an application?
What happens if multiple codebases are used for an application?
What is considered a backing service?
What is considered a backing service?
What does the build stage transform in the deployment process?
What does the build stage transform in the deployment process?
What does explicitly declaring dependencies typically involve?
What does explicitly declaring dependencies typically involve?
What approach allows an application to switch between different instances of a backing service?
What approach allows an application to switch between different instances of a backing service?
What principle aids in rapidly deploying and scaling applications according to the Twelve-Factor methodology?
What principle aids in rapidly deploying and scaling applications according to the Twelve-Factor methodology?
Which of the following is NOT a pillar of cloud-native application design according to the Twelve-Factor methodology?
Which of the following is NOT a pillar of cloud-native application design according to the Twelve-Factor methodology?
Why should dependencies be isolated?
Why should dependencies be isolated?
What is the purpose of storing configuration separately from code?
What is the purpose of storing configuration separately from code?
What does treating local services the same as remote services imply?
What does treating local services the same as remote services imply?
What is an appropriate description of the transformation from codebase to deploy?
What is an appropriate description of the transformation from codebase to deploy?
What is the primary characteristic of processes in the Twelve-Factor App methodology?
What is the primary characteristic of processes in the Twelve-Factor App methodology?
Which service is NOT typically considered a stateful backing service in the Twelve-Factor App methodology?
Which service is NOT typically considered a stateful backing service in the Twelve-Factor App methodology?
What does port binding encourage in the deployment of a Twelve-Factor App?
What does port binding encourage in the deployment of a Twelve-Factor App?
What is the primary benefit of favoring fast startup in application deployment?
What is the primary benefit of favoring fast startup in application deployment?
What scaling method is preferred in a Twelve-Factor App?
What scaling method is preferred in a Twelve-Factor App?
Why is it important to maintain development, staging, and production environments similar?
Why is it important to maintain development, staging, and production environments similar?
How should logs be treated according to best practices?
How should logs be treated according to best practices?
What should happen to service instances according to the disposability factor?
What should happen to service instances according to the disposability factor?
What is a key characteristic of admin processes in an application environment?
What is a key characteristic of admin processes in an application environment?
Which of the following statements about stateless processes is NOT true?
Which of the following statements about stateless processes is NOT true?
What can help ensure that the same execution environment is used across development and production?
What can help ensure that the same execution environment is used across development and production?
How do Twelve-Factor Apps manage robustness according to the disposability factor?
How do Twelve-Factor Apps manage robustness according to the disposability factor?
Which of the following is a benefit of the Twelve-Factor App's approach to port binding?
Which of the following is a benefit of the Twelve-Factor App's approach to port binding?
What is the main reason to propagate log data to external systems like Azure Monitor?
What is the main reason to propagate log data to external systems like Azure Monitor?
Which factor helps avoid issues with divergent environments during admin tasks?
Which factor helps avoid issues with divergent environments during admin tasks?
What should applications primarily avoid concerning log management?
What should applications primarily avoid concerning log management?
What does the build stage fetch and compile during the deployment process?
What does the build stage fetch and compile during the deployment process?
What must each release enforce according to best practices?
What must each release enforce according to best practices?
What is the outcome of the release stage in the deployment process?
What is the outcome of the release stage in the deployment process?
What does it mean when it is stated that 'each release should be tagged with a unique ID'?
What does it mean when it is stated that 'each release should be tagged with a unique ID'?
Why is it impossible to make changes to the code at runtime?
Why is it impossible to make changes to the code at runtime?
What is the function of the run stage in the deployment process?
What is the function of the run stage in the deployment process?
In modern CI/CD systems, what principle is particularly fulfilled regarding releases?
In modern CI/CD systems, what principle is particularly fulfilled regarding releases?
What is a defining characteristic of a successful deployment process?
What is a defining characteristic of a successful deployment process?
Flashcards are hidden until you start studying
Study Notes
Overview of Twelve-Factor Methodology
- A cloud-native application framework emphasizing portability and declarative automation.
- Ideal for constructing applications that can rapidly deploy and scale.
- Serves as a foundational guideline for cloud-native app development.
Code Base
- Must have a single codebase in version control (e.g., Git), supporting multiple deployment environments.
- Each application maps to one codebase; multiple codebases indicate a distributed system.
Dependencies
- All app dependencies should be explicitly declared in a management file (e.g., requirements.txt, package.json).
- Applications must not depend on the host’s pre-installed libraries; package dependencies with the app.
Configurations
- Store configuration settings (e.g., database credentials) in environment variables instead of hard-coding.
- Enhances security and allows easy changes in configurations during runtime.
Backing Services
- Treat any service utilized over a network (datastores, messaging systems) as attached resources.
- Applications should operate with both local and remote services interchangeably without code modifications.
Build, Release, Run
- Separate the processes of build (creating an executable bundle), release (combining build with config), and run (executing the app).
- Unique IDs for releases facilitate strategic rollbacks if necessary.
Processes
- Applications should be executed as stateless processes, relying on external stateful services for data storage.
- This structure promotes scalability and reliability.
Port Binding
- Applications should self-bind to ports, accepting incoming requests directly without requiring external web servers.
- This encourages self-contained deployments.
Concurrency
- Focus on horizontal scaling by running multiple stateless process instances instead of scaling vertically.
- Enhances the cloud-native experience by facilitating easy scaling.
Disposability
- Service instances must be easily disposable, ensuring minimal startup time and graceful shutdowns.
- Containers, like Docker, naturally support these requirements.
Dev/Prod Parity
- Maintain similar conditions across development, staging, and production environments to prevent inconsistencies.
- Containers can help standardize execution environments.
Logging
- Handle logs as event streams; applications should not manage log files directly.
- Logs should be output to standard output and processed externally for analysis.
Admin Processes
- Execute administrative tasks (e.g., database migrations) as one-off processes utilizing the same codebase and environment.
- Ensures consistency and avoids discrepancies in task execution environments.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
