Getting started with Microservices with Istio and IBM Cloud Kubernetes Service Quiz Answers

Get Getting started with Microservices with Istio and IBM Cloud Kubernetes Service Quiz Answers

In this course, you learn about the twelve-factor app methodology, microservices, and Istio foundational technologies. These cloud-native technologies are the essentials as you build new apps for the cloud. Microservices are the building blocks for your cloud architecture. Then, you layer on Istio to help you connect, manage, and secure those microservices. All of those are then put together in IBM Cloud Kubernetes Service.

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Twelve-factor app

Question: The 12-factor app methodology minimizes divergence among development and production, enabling continuous deployment for maximum agility.

• True
• False

Question: Disposability refers to which of these concepts?

• An app runs as one or more stateless processes that share nothing and assumes process memory is transient.
• Apps are built in distinct stages (build, release, run).
• Processes start fast and shut down gracefully, which means that processors should start almost instantaneously.
• Developers treat logs as event streams: the outer/hosting environment deals with processing and routing log files.

Question: According to the twelve-factor app methodology, where should you store configuration information?

• In the environment
• In the code
• In the server where you deploy the code
• In the properties files

Question: When you are trying to build a scalable, distributed, cloud-ready app, you should run that app as one or more stateless processes.

• True
• False

Microservices

Question: For a simple change, monolithic apps take a long time to get the updated app redeployed.

• True
• False

Question: Select the three benefits of implementing a microservices architecture.

• Different parts of a development team can manage individual parts of a microservice.
• You’ll see less service interruption for fast-paced cloud computing.
• A suite of services can be deployed and upgraded without a rebuild of other functioning services.
• If one component fails, it will all fail.

Question: Which principle is exemplified by this statement? “Microservices are an app architectural style that divides an app into components where each component is a full but miniature app that’s focused on producing a single business task.”

• The Single Business Task principle
• The Single Responsibility principle
• The Multiple Component principle
• The Microservices principle

Question: Agile development methods helped make microservice design and implementation possible.

• True
• False

Application architecture evolution: From SOA to microservices

Question: The SOA stack had to string together sequences of services as business processes that were themselves macroservices.

• True
• False

Question: A microservice app must have a well-defined interface and well-defined dependencies.

• True
• False

Question: What problems do you typically encounter when you develop monolithic apps? Select all that apply.

• No one person can maintain a vertical slice of an app.
• Developer challenges are with DevOps, management views, and controls.
• Developers spend a lot of time in meetings deciding how the layers of code should work together.
• A change in one layer usually broke the layers above it.

Question: You can use IBM Cloud Kubernetes Service to repackage monolithic apps into containers.

• True
• False

Microservices component architecture

Question: The number of business services that you implement for an app depends on what types of clients the app supports and how specialized those clients require their dispatchers to be.

• True
• False

Question: In this course, BFF refers to which concept?

• Best friend forever
• Back for front
• Backend for frontend
• Backend first failure

Question: You should separate the database access layer into its own service.

• True
• False

Question: It’s more efficient and effective to have one team write all or multiple dispatchers while someone else implements the client apps.

• True
• False

Microservices integration

Question: You should not mix and match synchronous and asynchronous communication.

• True
• False

Question: By using asynchronous communication, you can make microservices more robust. Which of these actions is not used in asynchronous communication?

• A different requester instance can handle the response.
• The requester, provider, and messages must keep working through the lifetime of the invocation.
• The messaging system holds the action and result.
• The requester doesn’t need to block while the provider runs.

Question: Which of these methods help with complete decoupling of microservice intercommunication?

• Service registry or service discovery
• Load balancing
• Circuit breaker patterns
• All of these

Question: The public VLAN determines the public IP address that is assigned to a worker node during cluster creation.

• True
• False

Service mesh

Question: In monolithic apps, the location of resources are well known, relatively static, and found in configuration files or hard coded.

• True
• False

Question: A service registry is used to keep track of the code and health of services.

• True
• False

Question: Which of the following common functions are provided by service mesh implementation like Istio? Select all that apply.

• Automated testing
• Service registry
• Service discovery
• Service proxy

Question: Client-side discovery uses a load balancer to query the service registry and direct a request to the appropriate service instance.

• True
• False

Istio: An intelligent service mesh for microservices

Question: Client-side discovery uses a load balancer to query the service registry and direct a request to the appropriate service instance.

• True
• False

Question: Which source projects were the basis for Istio?

• IBM’s Amalgam8 project
• Google’s Service Control
• Lyft’s Envoy proxy
• All of these

Question: Istio is an open platform service mesh implementation for connecting, managing, and securing microservices.

• True
• False

Question: Select the three benefits of implementing a microservices architecture.

• Different parts of a development team can manage individual parts of a microservice.
• You’ll see less service interruption for fast-paced cloud computing.
• A suite of services can be deployed and upgraded without a rebuild of other functioning services.
• If one component fails, everything fails.

Final Exam

Question: Which component is responsible for collecting telemetry data from the Envoy proxy and other services?

• Citadel
• Kubernetes container
• Mixer
• Pilot

Question: What is the core Istio component that is used for traffic management and configuration of all Envoy instances deployed in an Istio service mesh?

• Mixer
• Citadel
• Pilot
• None of these

Question: Which of these twelve-factor app methodologies ties into agile software delivery, continuous integration, and continuous deployment concepts, and minimizing incompatibility?

• Admin processes
• Dependencies
• Development and production parity
• Build, release, run

Question: Which of these principles when they’re applied to developing microservices can make developers more efficient? Select all that apply.

• Creating well-defined interfaces that are independently deployed
• Managing one large app that does everything
• Operating in small teams with each team owning the entire lifecycle of the service
• Reducing an app into single-function modules

Question: You can’t roll back a microservice deployment to a specified version within IBM Cloud Kubernetes Service.

• True
• False

Question: 12-factor apps should be scaled up via vertical scaling.

• True
• False

Question: The aim of a microservice architecture is to completely link app components to one another so that they can be maintained, scaled, and more.

• True
• False

Question: What are the two key tenets of a microservice architecture?

• Services are optimized for multiple functions.
• Communication is done through REST API and message brokers.
• Continuous integration and continuous deployment (CI/CD) are defined per service.
• Business functions are packaged as a single monolith app.

Question: Microservices scale and fail interdependently.

• True
• False

Question: Which functions enable each service to find and connect with the other services it needs to do its work?

• Sidecar
• Service discovery
• Service registry
• Circuit breaker

Question: The Istio service mesh is logically split into which two parts?

• Control plane
• Network plane
• Data plane
• Infrastructure plane

Question: The data plane is composed of a set of intelligent proxies deployed as sidecars that mediate and control all security among microservices.

• True
• False

Question: The control plane manages and configures proxies to route traffic and to enforce policies at runtime

• True
• False

Question: What are the main features of Citadel?

• Service-to-service and end-user authentication using mutual TLS
• Identity management
• Logging management
• Credential management

Question: Istio authentication includes key management.

• True
• False

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