CompTIA CV0-004 Online Practice Questions and Exam Preparation

CompTIA CV0-004 Online Questions & Answers

• Question 471:

  A cloud developer is creating a static website that customers will be accessing globally.

  Which of the following services will help reduce latency?

  A. VPC
  B. Application load balancer
  C. CDN
  D. API gateway
  C. CDN

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  Explanation

  A Content Delivery Network (CDN) is the service that will help reduce latency for a static website accessed globally. CDNs distribute content across multiple geographically dispersed servers, allowing users to connect to a server that is closer to them, thereby reducing the time it takes to load the website.

  References:

  The use of CDNs is a common practice to enhance global access and improve user experience, as covered under Cloud Concepts in the CompTIA Cloud+ certification.

• Question 472:

  A cloud engineer was deploying the company's payment processing application, but it failed with the following error log: ERFOR:root: Transaction failed http 429 response, please try again.

  Which of the following are the most likely causes for this error? (Select two).

  A. API throttling
  B. API gateway outage
  C. Web server outage
  D. Oversubscription
  E. Unauthorized access
  F. Insufficient quota
  A. API throttling
  F. Insufficient quota

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  Explanation

  The error "http 429 response, please try again" typically indicates API throttling, where the number of requests exceeds the rate limit set by the API provider, and insufficient quota, where the allowed number of API calls within a given timeframe has been exceeded.

  References:

  API throttling and quota management are key concepts in the management of cloud resources, as highlighted in the CompTIA Cloud+ curriculum.

• Question 473:

  A cloud application fails to retrieve data from an API. A cloud engineer reviews the following log:

  [ERROR] HTTP 429 - Too many requests [INFO] API rate limit exceeded [WARNING] API throttled.

  Which of the following is the best resolution?

  A. Upgrade the network bandwidth
  B. Increase the database storage.
  C. Implement exponential backoff.
  D. Restart the API server.
  C. Implement exponential backoff.

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  Explanation

  Exponential backoff is the correct response to rate limiting because it spaces out retry attempts after throttling occurs. This reduces repeated immediate requests, allows the service time to recover, and aligns the client behavior with API rate-limit handling best practices.

• Question 474:

  A web application has been configured to use auto-scaling for provisioning and deprovisioning more VMs according to the workload. The systems administrator deployed a new CI/CD tool to automate new releases of the web application. During the night, a script was deployed and configured to be executed by the VMs during bootstrapping. Now, the auto-scaling configuration is creating a new VM every five minutes.

  Which of the following actions will MOST likely resolve the issue?

  A. Reducing the maximum threshold in the auto-scaling configuration
  B. Debugging the script and redeploying it
  C. Changing the automation tool because it is incompatible
  D. Modifying the script to shut down the VM after five minutes
  B. Debugging the script and redeploying it

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  Explanation

  The best way to resolve the issue where the autoscaling configuration is creating a new VM every five minutes after deploying a new CI/CD tool to automate new releases of the web application and configuring a script to be executed by the VMs during bootstrapping is to debug the script and redeploy it. Debugging the script means finding and fixing any errors or bugs in the code or logic of the script that may cause unexpected or undesired behavior, such as triggering the autoscaling condition or failing to complete the bootstrapping process. Redeploying the script means updating or replacing the existing script with the corrected or improved version of the script.

  References:

  [CompTIA Cloud+ Certification Exam Objectives], Domain 4.0 Troubleshooting, Objective 4.5 Given a scenario, troubleshoot automation/orchestration issues.

• Question 475:

  A developer sends multiple requests to a SaaS application in a short amount of time. The developer realizes that the entire server and all other users can no longer send requests to the application.

  Which of the following best describes the issue?

  A. Service quotas
  B. API rate limiting
  C. Full outage
  D. Regional service availability
  B. API rate limiting

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  Explanation

  API rate limiting is a mechanism used by SaaS applications to prevent abuse by limiting the number of requests that can be made to an API within a specified time frame. If the developer sent too many requests in a short period, the application may have triggered rate limiting, causing temporary blocks on further requests from the server or affecting all users if the limits were exceeded on a shared resource.

• Question 476:

  A cloud server needs to automatically allocate more resources during sudden peak times. This allocation does not need to occur in regular intervals.

  Which of the following scaling approaches should be used?

  A. Event
  B. Manual
  C. Trending
  D. Scheduled
  A. Event

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  Explanation

  Event-based scaling is designed to allocate more resources automatically in response to specific events, such as sudden peak times that are not regular or predictable. This type of scaling ensures that resources are available when needed without the need to schedule them in advance or adjust them manually.

  References:

  CompTIA Cloud+ Guide to Cloud Computing (ISBN: 978-1-64274-282-2)

• Question 477:

  A systems administrator is reviewing the logs from a company's IDS and notices a large amount of outgoing traffic from a particular server. The administrator then runs a scan on the server, which detects malware that cannot be removed.

  Which of the following should the administrator do first?

  A. Determine the root cause.
  B. Disconnect the server from the network.
  C. Perform a more intrusive scan.
  D. Restore the server from a backup.
  B. Disconnect the server from the network.

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  Explanation

  The first step in any incident response procedure is to contain the incident and prevent it from spreading or causing more damage. In this scenario, the systems administrator is reviewing the logs from a company's IDS and notices a large amount of outgoing traffic from a particular server. The administrator then runs a scan on the server, which detects malware that cannot be removed. This indicates that the server is compromised and may be sending malicious or sensitive data to an external source. Therefore, the best thing to do first is to disconnect the server from the network, which will isolate it from the rest of the system and stop the data exfiltration. Determining the root cause, performing a more intrusive scan, and restoring the server from a backup are all important steps, but they should be done after the server is disconnected from the network.

  References:

  CompTIA Cloud+ CV0-003 Certification Study Guide, Chapter 10, Incident Response Procedures, page 1771.

• Question 478:

  A systems administrator reviews the following standard maintenance script:

  

  The script is difficult for the systems administrator to update because the location and the name of the update binary are referenced in the copy command. The script execution triggers future line changes each time maintenance is performed.

  Which of the following will resolve this issue with minimal overhead?

  A. Implementing an API to receive the parameters remotely
  B. Adding a variable to contain the file path
  C. Creating a function to search the remote filesystem
  D. Inserting a line into the code that calls to a different script
  B. Adding a variable to contain the file path

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  Explanation

  Using a variable to store the file path removes the hard-coded update location and filename from the copy command, making the script easier to maintain. Future updates would require changing the value in one place instead of modifying multiple lines, which solves the issue with minimal overhead.

• Question 479:

  An organization is working to become compliant with industry regulations. An administrator needs to amend the organization's existing log policy so that logs are available during the period in which the organization is audited.

  Which of the following should the administrator implement?

  A. Log retention
  B. Log aggregation
  C. Log collection
  D. Log tracing
  A. Log retention

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  Explanation

  Log retention ensures logs are stored and preserved for a defined period, meeting compliance requirements and guaranteeing availability during audits.

• Question 480:

  A cloud administrator needs to distribute workloads across remote data centers for redundancy reasons.

  Which of the following deployment strategies eliminates downtime accelerates deployment, and deploys in batches?

  A. In-place
  B. Rolling
  C. Blue-green
  D. Canary
  B. Rolling

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  Explanation

  A rolling deployment updates systems in batches across multiple data centers without taking the service offline. This approach provides redundancy, avoids downtime, and accelerates deployment by updating portions of the environment sequentially.