Free CV0-004 Exam Braindumps (page: 20)

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A software engineer needs to transfer data over the internet using programmatic access while also being able to query the dat

  1. Which of the following will best help the engineer to complete this task?
  2. SQL
  3. Web sockets
  4. RPC
  5. GraphQL

Answer(s): D

Explanation:

GraphQL is the best option for transferring data over the internet with programmatic access and querying capabilities. It is a query language for APIs and a runtime for executing those queries with existing data, providing a more efficient, powerful, and flexible alternative to the REST API.


Reference:

Data transfer and querying methods are part of the technical knowledge associated with cloud computing, as included in CompTIA Cloud+.



A cloud administrator needs to distribute workloads across remote data centers for redundancy reasons.
Which of the following deployment strategies would eliminate downtime, accelerate deployment, and remain cost efficient?

  1. In-place
  2. Rolling
  3. Blue-green
  4. Canary

Answer(s): C

Explanation:

Blue-green deployment is the strategy that can eliminate downtime, accelerate deployment, and remain cost-efficient. It involves running two identical production environments, only one of which is live at any given time (blue or green).
When it's time to deploy, the new version is released to the inactive environment (green), which is then thoroughly tested. Once ready, the traffic is switched over, making the green environment live.


Reference:

Deployment strategies and their impact on operations are a significant topic within the CompTIA Cloud+ examination objectives.



An administrator used a script that worked in the past to create and tag five virtual machines. All of the virtual machines have been created: however, the administrator sees the following results:
{ tags: [ ] }
Which of the following is the most likely reason for this result?

  1. API throttling
  2. Service quotas
  3. Command deprecation
  4. Compatibility issues

Answer(s): C

Explanation:

The most likely reason for the script creating virtual machines without tags, despite working in the past, is command deprecation. Cloud service providers update their APIs and CLI commands over time, and a previously used command to tag resources might no longer be valid.


Reference:

Understanding cloud service APIs and the importance of keeping up with updates is part of cloud technical operations covered in CompTIA Cloud+.



A company has one cloud-based web server that is prone to downtime during maintenance.
Which ot the following should the cloud engineer add to ensure high availability?

  1. A redundant web server behind a load balancer
  2. A backup cloud web server
  3. A secondary network link to the web server
  4. An autoscaling feature on the web server

Answer(s): A

Explanation:

Adding a redundant web server behind a load balancer is the solution that will ensure high availability. If one server goes down for maintenance, the other can take over, ensuring that the web service remains available without interruption.


Reference:

High availability concepts, including the use of load balancers and redundant servers, are part of cloud infrastructure design as per CompTIA Cloud+.






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