ESP Chapter 6

What is a software service in the context of microservices architecture?

• A component that does not produce any output

• A component that can be accessed from remote computers over the Internet

• A component that can only be accessed locally

• A component that has side effects

What is a characteristic of modern web services?

• They are not adaptable or scalable

• They have high overheads for service communication

• They are based on XML-based protocols

• They use lightweight service-interaction protocols

What are microservices in the context of software architecture?

• Small-scale, stateless, services with a single responsibility

• Large-scale, stateful, services with multiple responsibilities

• Services that are tightly coupled and dependent on each other

• Services that do not communicate with each other

What is a key characteristic of microservices architecture?

• Independently deployable

• Dependent on other services for deployment

• Limited to a single programming language

• Limited to a single technology for implementation

What is the purpose of a message sent between microservices?

• Includes only the data required to deliver the requested service

• Includes only administrative information about the service

• Includes administrative information, a service request, and the data required to deliver the requested service

• Includes only the service request without any data

What is the measure of the number of relationships that parts of a component have with each other?

• Responsibility

• Consistency

• Coupling

• Cohesion

What is the purpose of a circuit breaker in coping with service failure?

• Monitors the performance of a service and reports failures

• Immediately denies access to a failed service without the delays associated with timeouts

• Delays service calls to a failed service by a predefined value

• Automatically restarts a failed service

What is the fundamental approach used in the web for transferring representations of digital resources from a server to a client?

• RESTful architectural style

• SOAP for service interaction

• Stateful service interaction

• WSDL for interface description

What is the purpose of continuous deployment in a microservices system?

• To avoid the deployment of new service versions altogether

• To delay the deployment of new service versions for thorough manual testing

• To put new versions of a service into production as soon as a service change has been made

• To limit the deployment of new service versions to specific times of the year

What is a characteristic of RESTful service operations?

• Implemented using HTTP verbs such as GET, PUT, POST, and DELETE

• Implemented using custom verbs specific to each service

• Implemented using only the POST verb for all operations

• Implemented using only the GET verb for all operations