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Google Professional-Cloud-Architect Exam Practice Questions (P. 4)

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Question #31
A development manager is building a new application. He asks you to review his requirements and identify what cloud technologies he can use to meet them. The application must:
1. Be based on open-source technology for cloud portability
2. Dynamically scale compute capacity based on demand
3. Support continuous software delivery
4. Run multiple segregated copies of the same application stack
5. Deploy application bundles using dynamic templates
6. Route network traffic to specific services based on URL
Which combination of technologies will meet all of his requirements?
  1. A
    Google Kubernetes Engine, Jenkins, and Helm
  2. B
    Google Kubernetes Engine and Cloud Load Balancing
  3. C
    Google Kubernetes Engine and Cloud Deployment Manager
  4. D
    Google Kubernetes Engine, Jenkins, and Cloud Load Balancing

Correct Answer:
D
Jenkins is an open-source automation server that lets you flexibly orchestrate your build, test, and deployment pipelines. Kubernetes Engine is a hosted version of
Kubernetes, a powerful cluster manager and orchestration system for containers.
When you need to set up a continuous delivery (CD) pipeline, deploying Jenkins on Kubernetes Engine provides important benefits over a standard VM-based deployment
Incorrect Answers:
A: Helm is a tool for managing Kubernetes charts. Charts are packages of pre-configured Kubernetes resources.
Use Helm to:
Find and use popular software packaged as Kubernetes charts

✑ Share your own applications as Kubernetes charts
✑ Create reproducible builds of your Kubernetes applications
✑ Intelligently manage your Kubernetes manifest files
✑ Manage releases of Helm packages
Reference:
https://cloud.google.com/solutions/jenkins-on-kubernetes-engine

Question #32
You have created several pre-emptible Linux virtual machine instances using Google Compute Engine. You want to properly shut down your application before the virtual machines are preempted.
What should you do?
  1. A
    Create a shutdown script named k99.shutdown in the /etc/rc.6.d/ directory
  2. B
    Create a shutdown script registered as a xinetd service in Linux and configure a Stackdriver endpoint check to call the service
  3. C
    Create a shutdown script and use it as the value for a new metadata entry with the key shutdown-script in the Cloud Platform Console when you create the new virtual machine instance
  4. D
    Create a shutdown script, registered as a xinetd service in Linux, and use the gcloud compute instances add-metadata command to specify the service URL as the value for a new metadata entry with the key shutdown-script-url

Correct Answer:
C
A startup script, or a shutdown script, is specified through the metadata server, using startup script metadata keys.
Reference:
https://cloud.google.com/compute/docs/startupscript

Question #33
Your organization has a 3-tier web application deployed in the same network on Google Cloud Platform. Each tier (web, API, and database) scales independently of the others. Network traffic should flow through the web to the API tier and then on to the database tier. Traffic should not flow between the web and the database tier.
How should you configure the network?
  1. A
    Add each tier to a different subnetwork
  2. B
    Set up software based firewalls on individual VMs
  3. C
    Add tags to each tier and set up routes to allow the desired traffic flow
  4. D
    Add tags to each tier and set up firewall rules to allow the desired traffic flow

Correct Answer:
D
Google Cloud Platform(GCP) enforces firewall rules through rules and tags. GCP rules and tags can be defined once and used across all regions.
Reference:
https://cloud.google.com/docs/compare/openstack/
https://aws.amazon.com/it/blogs/aws/building-three-tier-architectures-with-security-groups/

Question #34
Your development team has installed a new Linux kernel module on the batch servers in Google Compute Engine (GCE) virtual machines (VMs) to speed up the nightly batch process. Two days after the installation, 50% of the batch servers failed the nightly batch run. You want to collect details on the failure to pass back to the development team.
Which three actions should you take? (Choose three.)
  1. A
    Use Stackdriver Logging to search for the module log entries
  2. B
    Read the debug GCE Activity log using the API or Cloud Console
  3. C
    Use gcloud or Cloud Console to connect to the serial console and observe the logs
  4. D
    Identify whether a live migration event of the failed server occurred, using in the activity log
  5. E
    Adjust the Google Stackdriver timeline to match the failure time, and observe the batch server metrics
  6. F
    Export a debug VM into an image, and run the image on a local server where kernel log messages will be displayed on the native screen

Correct Answer:
ACE

Question #35
Your company wants to try out the cloud with low risk. They want to archive approximately 100 TB of their log data to the cloud and test the analytics features available to them there, while also retaining that data as a long-term disaster recovery backup.
Which two steps should you take? (Choose two.)
  1. A
    Load logs into Google BigQuery
  2. B
    Load logs into Google Cloud SQL
  3. C
    Import logs into Google Stackdriver
  4. D
    Insert logs into Google Cloud Bigtable
  5. E
    Upload log files into Google Cloud Storage

Correct Answer:
AE

Question #36
You created a pipeline that can deploy your source code changes to your infrastructure in instance groups for self-healing. One of the changes negatively affects your key performance indicator. You are not sure how to fix it, and investigation could take up to a week.
What should you do?
  1. A
    Log in to a server, and iterate on the fox locally
  2. B
    Revert the source code change, and rerun the deployment pipeline
  3. C
    Log into the servers with the bad code change, and swap in the previous code
  4. D
    Change the instance group template to the previous one, and delete all instances

Correct Answer:
B

Question #37
Your organization wants to control IAM policies for different departments independently, but centrally.
Which approach should you take?
  1. A
    Multiple Organizations with multiple Folders
  2. B
    Multiple Organizations, one for each department
  3. C
    A single Organization with Folders for each department
  4. D
    A single Organization with multiple projects, each with a central owner

Correct Answer:
C
Folders are nodes in the Cloud Platform Resource Hierarchy. A folder can contain projects, other folders, or a combination of both. You can use folders to group projects under an organization in a hierarchy. For example, your organization might contain multiple departments, each with its own set of GCP resources. Folders allow you to group these resources on a per-department basis. Folders are used to group resources that share common IAM policies. While a folder can contain multiple folders or resources, a given folder or resource can have exactly one parent.
Reference:
https://cloud.google.com/resource-manager/docs/creating-managing-folders

Question #38
You deploy your custom Java application to Google App Engine. It fails to deploy and gives you the following stack trace.
What should you do?

  1. A
    Upload missing JAR files and redeploy your application.
  2. B
    Digitally sign all of your JAR files and redeploy your application
  3. C
    Recompile the CLoakedServlet class using and MD5 hash instead of SHA1

Correct Answer:
B

Question #39
You are designing a mobile chat application. You want to ensure people cannot spoof chat messages, by providing a message were sent by a specific user.
What should you do?
  1. A
    Tag messages client side with the originating user identifier and the destination user.
  2. B
    Encrypt the message client side using block-based encryption with a shared key.
  3. C
    Use public key infrastructure (PKI) to encrypt the message client side using the originating user's private key.
  4. D
    Use a trusted certificate authority to enable SSL connectivity between the client application and the server.

Correct Answer:
C

Question #40
As part of implementing their disaster recovery plan, your company is trying to replicate their production MySQL database from their private data center to their
GCP project using a Google Cloud VPN connection. They are experiencing latency issues and a small amount of packet loss that is disrupting the replication.
What should they do?
  1. A
    Configure their replication to use UDP.
  2. B
    Configure a Google Cloud Dedicated Interconnect.
  3. C
    Restore their database daily using Google Cloud SQL.
  4. D
    Add additional VPN connections and load balance them.
  5. E
    Send the replicated transaction to Google Cloud Pub/Sub.

Correct Answer:
B

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