Docker Certified Associate (DCA) - DCA Exam Practice Test
Will this command mount the host's '/data1directory to the ubuntu container in read-only mode?
Solution. 'docker run -v /data:/mydata -mode readonly ubuntu'
Solution. 'docker run -v /data:/mydata -mode readonly ubuntu'
Correct Answer: A
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Does this command create a swarm service that only listens on port 53 using the UDP protocol?
Solution. 'docker service create -name dns-cache -p 53:53 -constraint networking.protocol.udp=true dns-cache"
Solution. 'docker service create -name dns-cache -p 53:53 -constraint networking.protocol.udp=true dns-cache"
Correct Answer: A
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Will a DTR security scan detect this?
Solution.image configuration poor practices, such as exposed ports or inclusion of compilers in production images
Solution.image configuration poor practices, such as exposed ports or inclusion of compilers in production images
Correct Answer: A
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In Docker Trusted Registry, is this how a user can prevent an image, such as 'nginx:latest', from being overwritten by another user with push access to the repository?
Solution: Remove push access from all other users.
Solution: Remove push access from all other users.
Correct Answer: A
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Is this an advantage of multi-stage builds?
Solution: better caching when building Docker images
Solution: better caching when building Docker images
Correct Answer: B
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Is this statement correct?
Solution: A Dockerfile provides instructions for building a Docker image
Solution: A Dockerfile provides instructions for building a Docker image
Correct Answer: B
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Is this statement correct?
Solution.A Dockerfile stores persistent data between deployments of a container
Solution.A Dockerfile stores persistent data between deployments of a container
Correct Answer: A
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Is this a type of Linux kernel namespace that provides container isolation?
Solution.Process ID
Solution.Process ID
Correct Answer: B
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The following Docker Compose file is deployed as a stack:
Is this statement correct about this health check definition?
Solution: Health checks test for app health five seconds apart. If the test fails, the container will be restarted three times before it gets rescheduled.
Is this statement correct about this health check definition?
Solution: Health checks test for app health five seconds apart. If the test fails, the container will be restarted three times before it gets rescheduled.
Correct Answer: A
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You configure a local Docker engine to enforce content trust by setting the environment variable DOCKER_C0NTENT_TRUST=l. If myorg/myimage: 1.0 is unsigned, does Docker block this command?
Solution.docker image build, from a Dockeflle that begins FROM myorg/myimage: l1.0
Solution.docker image build, from a Dockeflle that begins FROM myorg/myimage: l1.0
Correct Answer: B
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The Kubernetes yaml shown below describes a clusterIP service.
Is this a correct statement about how this service routes requests?
Solution: Traffic sent to the IP of this service on port 8080 will be routed to port 80 in a random pod with the label aPP: nginx.
Is this a correct statement about how this service routes requests?
Solution: Traffic sent to the IP of this service on port 8080 will be routed to port 80 in a random pod with the label aPP: nginx.
Correct Answer: B
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Is this a type of Linux kernel namespace that provides container isolation?
Solution.Host
Solution.Host
Correct Answer: A
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A company's security policy specifies that development and production containers must run on separate nodes in a given Swarm cluster.
Can this be used to schedule containers to meet the security policy requirements?
Solution: resource reservation
Can this be used to schedule containers to meet the security policy requirements?
Solution: resource reservation
Correct Answer: A
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Are these conditions sufficient for Kubernetes to dynamically provision a persistentVolume, assuming there are no limitations on the amount and type of available external storage?
Solution: A volume is defined in a pod specification with the key persistentVolume: default.
Solution: A volume is defined in a pod specification with the key persistentVolume: default.
Correct Answer: A
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