Free Access to Docker.DCA.v2024-05-09.q158 with Valid Practice Test (Page 15)

Request Exam Contact

Home
View All Exams
New QA's
Upload

PRACTICE EXAMS:

Oracle
Fortinet
Juniper
Microsoft
Cisco
Citrix
CompTIA
VMware
ISC
SAP
EMC
PMI
HP
Salesforce
Other

Oracle
Fortinet
Juniper
Microsoft
Cisco
Citrix
CompTIA
VMware
ISC
SAP
EMC
PMI
HP
Salesforce

Home
Docker Certification
DCA Exam
Docker.DCA.v2024-05-09.q158 Dumps

««
«
…
10
11
12
13
14
15
16
17
18
19
…
»
»»

Question 66

The Kubernetes yaml shown below describes a networkPolicy.

Will the networkPolicy BLOCK this traffic?
Solution: a request issued from a pod bearing the tier: backend label, to a pod bearing the tier: frontend label

A.Yes
B.No

Correct Answer: A

Explanation
The networkPolicy will block this traffic because it only allows ingress traffic from pods that have the tier: api label. Pods that have the tier: backend label do not match this selector and are therefore denied access to pods that have the tier: frontend label.
References:
https://kubernetes.io/docs/concepts/services-networking/network-policies/#the-networkpolicy-resource

Comment: *

Name: *

Email: *

Verification: *

insert code

Question 67

Will this configuration achieve fault tolerance for managers in a swarm?
Solution: only two managers, one active and one passive.

A.Yes
B.No

Correct Answer: B

Explanation
= The configuration will not achieve fault tolerance for managers in a swarm, because it does not have enough managers to form a quorum. A quorum is the minimum number of managers that must be available to agree on values and maintain the consistent state of the swarm. The quorum is calculated as (N/2)+1, where N is the number of managers in the swarm. For example, a swarm with 3 managers has a quorum of 2, and a swarm with 5 managers has a quorum of 3. Having only two managers, one active and one passive, means that the quorum is also 2. Therefore, if one manager fails or becomes unavailable, the swarm will lose the quorum and will not be able to process any requests or schedule any tasks. To achieve fault tolerance, a swarm should have an odd number of managers, at least 3, and no more than 7. This way, the swarm can tolerate the loss of up to (N-1)/2 managers and still maintain the quorum and the cluster state. References:
* Administer and maintain a swarm of Docker Engines
* Raft consensus in swarm mode
* How nodes work

Comment: *

Name: *

Email: *

Verification: *

insert code

Question 68

Seven managers are in a swarm cluster.
Is this how should they be distributed across three datacenters or availability zones?
Solution: 4-2-1

A.Yes
B.No

Correct Answer: B

Explanation
= This is not how the seven managers should be distributed across three datacenters or availability zones. A swarm cluster is a group of Docker hosts that are running in swarm mode and act as managers or workers1. A manager node is responsible for maintaining the swarm state and orchestrating the services2. A swarm cluster needs a quorum of managers to operate, which means a majority of managers must be available and able to communicate with each other3.
The problem with distributing the seven managers as 4-2-1 is that it creates a split-brain scenario, where the cluster can lose the quorum if one datacenter or availability zone fails. For example, if the datacenter with four managers goes down, the remaining three managers will not have enough votes to form a quorum, and the cluster will stop functioning. Similarly, if the datacenter with one manager goes down, the cluster will lose the tie-breaking vote and will not be able to elect a leader4.
A better way to distribute the seven managers across three datacenters or availability zones is to use 3-2-2, which ensures that the cluster can tolerate the failure of any one datacenter or availability zone and still maintain the quorum. For example, if the datacenter with three managers goes down, the remaining four managers will have enough votes to form a quorum and elect a leader. Similarly, if the datacenter with two managers goes down, the remaining five managers will have enough votes to form a quorum and elect a leader4. References:
* Swarm mode overview | Docker Docs
* Administer and maintain a swarm of Docker Engines | Docker Docs
* Raft consensus in swarm mode | Docker Docs
* Docker Swarm: How to distribute managers across availability zones? - Stack Overflow

Comment: *

Name: *

Email: *

Verification: *

insert code

Question 69

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 ten seconds apart. If the test fails, the container will be restarted three times before it gets rescheduled.

A.No
B.Yes

Correct Answer: A

Comment: *

Name: *

Email: *

Verification: *

insert code

Question 70

Is this an advantage of multi-stage builds?
Solution.better logical separation of Dockerfile instructions for increased readability

A.Yes
B.No

Correct Answer: A

Explanation
= Multi-stage builds allow you to use multiple FROM statements in your Dockerfile, each starting a new stage of the build1. This can help you achieve better logical separation of Dockerfile instructions for increased readability, as well as other benefits such as smaller image size, faster build time, and reduced security risks23.
By separating your Dockerfile into different stages, you can organize your instructions by their purpose, such as building, testing, or deploying your application. You can also copy only the artifacts you need from one stage to another, leaving behind the unnecessary dependencies or tools1. This can make your Dockerfile easier to read and maintain, as well as improve the performance and security of your final image. References:
* Multi-stage builds | Docker Docs
* What Are Multi-Stage Docker Builds? - How-To Geek
* Multi-stage | Docker Docs

Comment: *

Name: *

Email: *

Verification: *

insert code

««
«
…
10
11
12
13
14
15
16
17
18
19
…
»
»»

[×]

Download PDF File

Enter your email address to download Docker.DCA.v2024-05-09.q158 Dumps

Email:

Our website provides the Largest and the most Latest vendors Certification Exam materials around the world.

Using dumps we provide to Pass the Exam, we has the Valid Dumps with passing guranteed just which you need.

DMCA
About
Contact Us
Privacy Policy
Terms & Conditions

©2026 FreeQAs

www.freeqas.com materials do not contain actual questions and answers from Cisco's certification exams.

Web Analytics Made Easy - Statcounter