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# System prepended metadata

title: Docker Introduction

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# Docker Introduction

### Question 1: What type of hypervisor runs within an existing operating system?

>Type 2

### Question 2: Why do containers start up so quickly?

>They use the host OS

### Question 3: Which benefits are derived when using application containers? Choose 2

>Application isolation
>Portability

### Question 4: Which statement regarding containers is true? Choose two

>Many containers can run from a single image
>Containers occupy less disk space than VMs

### Question 5: Which 2 components comprise the Docker Engine? Choose two.

>CLI
>Daemon

### Question 6: Which dockerfile directive specifies an existing base image?

>FROM

### Question 7: Which command is used to create a docker image?

>docker build

### Question 8: What file format is used by the docker compose configuration file?

>YAML

### Question 9: Which feature prevents developer from modifying code that another developer is working on?

>Check-out

### Question 10: Which port is used for cluster management?

>2377

### Question 11: Which of the following are valid UCP authentication providers? Choose two.

>Active Directory
>LDAP

### Question 12: What term describes multiple image versions stored together?

>Repository