Introduction to Container Technology

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Questions and Answers

What is the primary goal of Docker?

  • To create a secure networking environment for applications
  • To make it possible to install and run software on any system (correct)
  • To develop a new programming language
  • To provide a platform for virtual machine management

What are microservices in a software development context?

  • Fine-grained, loosely coupled services that parallelize development (correct)
  • Services that depend on each other for every operation
  • Monolithic, tightly coupled services for streamlined development
  • Heavyweight, complex services for improved modularity

What does the formula 'Namespaces + Cgroups = LXC' represent?

  • A mathematical equation used in container orchestration
  • The foundational components of Linux containers (correct)
  • A formula for resource allocation in virtual machines
  • A Docker networking protocol

What is the primary benefit of decomposing an application into different smaller services in a microservices architecture?

<p>It improves modularity and makes the application easier to understand (B)</p>
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What does Docker Compose primarily facilitate?

<p>The definition and running of multi-container Docker applications (D)</p>
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What is the primary function of Docker Registry?

<p>To store and distribute Docker images (C)</p>
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How many pulls per 6-hour period are allowed for authenticated users on Docker Hub?

<p>200 pulls (A)</p>
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What command is used to login to a Docker registry with login credentials?

<p>docker login [OPTIONS] [SERVER] (B)</p>
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Which tool can be used to configure authentication for pushing Docker images to Google Cloud Platform (GCP) Container Registry?

<p>gcloud auth configure-docker (D)</p>
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What is the purpose of the Enhanced Service Account add-on on Docker Hub?

<p>To increase the number of allowed image pulls per day (A)</p>
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What is the primary function of Docker Compose?

<p>Defining and managing multi-container Docker applications (C)</p>
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What is the purpose of specifying 'depends_on' in a Docker Compose file?

<p>To define the order in which services start (D)</p>
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In Docker Compose, what does 'volumes' allow you to do?

<p>Mount host directories into the container (D)</p>
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What is the primary benefit of using Docker Compose to run multiple containers?

<p>Easier orchestration of multi-container applications (C)</p>
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What is the main advantage of using a declarative YAML file in Docker Compose?

<p>Avoiding a huge list of parameters when running containers (D)</p>
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