Google Google Certifications ASSOCIATE-CLOUD-ENGINEER Questions & Answers

• Question 21:

  You want to run a single caching HTTP reverse proxy on GCP for a latency-sensitive website. This specific reverse proxy consumes almost no CPU. You want to have a 30-GB in-memory cache, and need an additional 2 GB of memory for the rest of the processes. You want to minimize cost. How should you run this reverse proxy?

  A. Create a Cloud Memorystore for Redis instance with 32-GB capacity.

  B. Run it on Compute Engine, and choose a custom instance type with 6 vCPUs and 32 GB of memory.

  C. Package it in a container image, and run it on Kubernetes Engine, using n1-standard-32 instances as nodes.

  D. Run it on Compute Engine, choose the instance type n1-standard-1, and add an SSD persistent disk of 32 GB.

  Correct Answer: A

  Go to cloud console and create instance select Memorystore with Basic tier, select us-central1 and us-central1-a, and capacity 32GB, the cost estimate is $0.023/GB/hr

  select VM instance with custom machine type with 6 vCPUs and 32 GB memory, the same region and zone as Memorystore setting, the cost estimate is $0.239/hr

  Option B will definitely cost more as it adds on CPU usage cost even it uses little in this scenario, but still charge you. So answer is A from real practice example.

• Question 22:

  You are the organization and billing administrator for your company. The engineering team has the Project Creator role on the organization. You do not want the engineering team to be able to link projects to the billing account. Only the finance team should be able to link a project to a billing account, but they should not be able to make any other changes to projects. What should you do?

  A. Assign the finance team only the Billing Account User role on the billing account.

  B. Assign the engineering team only the Billing Account User role on the billing account.

  C. Assign the finance team the Billing Account User role on the billing account and the Project Billing Manager role on the organization.

  D. Assign the engineering team the Billing Account User role on the billing account and the Project Billing Manager role on the organization.

  Correct Answer: C

  When granted in combination with the _Billing Account User role_, the _Project Billing Manager_ role allows a user to attach the project to the billing account, but does not grant any rights over resources - YOU NEED BOTH

• Question 23:

  You have an application running in Google Kubernetes Engine (GKE) with cluster autoscaling enabled. The application exposes a TCP endpoint. There are several replicas of this application. You have a Compute Engine instance in the same region, but in another Virtual Private Cloud (VPC), called gce-network, that has no overlapping IP ranges with the first VPC. This instance needs to connect to the application on GKE. You want to minimize effort. What should you do?

  A. 1. In GKE, create a Service of type LoadBalancer that uses the application's Pods as backend.

  2.

  Set the service's externalTrafficPolicy to Cluster.

  3.

  Configure the Compute Engine instance to use the address of the load balancer that has been created.

  B. 1. In GKE, create a Service of type NodePort that uses the application's Pods as backend.

  2.

  Create a Compute Engine instance called proxy with 2 network interfaces, one in each VPC.

  3.

  Use iptables on this instance to forward traffic from gce-network to the GKE nodes.

  4.

  Configure the Compute Engine instance to use the address of proxy in gce-network as endpoint.

  C. 1. In GKE, create a Service of type LoadBalancer that uses the application's Pods as backend.

  2.

  Add an annotation to this service: cloud.google.com/load-balancer-type: Internal

  3.

  Peer the two VPCs together.

  4.

  Configure the Compute Engine instance to use the address of the load balancer that has been created.

  D. 1. In GKE, create a Service of type LoadBalancer that uses the application's Pods as backend.

  2.

  Add a Cloud Armor Security Policy to the load balancer that whitelists the internal IPs of the MIG's instances.

  3.

  Configure the Compute Engine instance to use the address of the load balancer that has been created.

  Correct Answer: A

  It's never mentioned in the question that traffic cannot go through the Internet but it's mentioned that effort should be minimized. A requires a lot less effort than C to accomplish the same (no VPC peering, per example).

• Question 24:

  You have a web application deployed as a managed instance group. You have a new version of the application to gradually deploy. Your web application is currently receiving live web traffic. You want to ensure that the available capacity does not decrease during the deployment. What should you do?

  A. Perform a rolling-action start-update with maxSurge set to 0 and maxUnavailable set to 1.

  B. Perform a rolling-action start-update with maxSurge set to 1 and maxUnavailable set to 0.

  C. Create a new managed instance group with an updated instance template. Add the group to the backend service for the load balancer. When all instances in the new managed instance group are healthy, delete the old managed instance group.

  D. Create a new instance template with the new application version. Update the existing managed instance group with the new instance template. Delete the instances in the managed instance group to allow the managed instance group to recreate the instance using the new instance template.

  Correct Answer: B

  We need to ensure the global capacity remains intact, for that reason we need to establish maxUnavailable to 0. On the other hand, we need to ensure new instances can be created. We do that by establishing the maxSurge to 1. Option C is more expensive and more difficult to set up and option D won't meet requirements since it won't keep global capacity intact.

• Question 25:

  You are building an application that stores relational data from users. Users across the globe will use this application. Your CTO is concerned about the scaling requirements because the size of the user base is unknown. You need to implement a database solution that can scale with your user growth with minimum configuration changes. Which storage solution should you use?

  A. Cloud SQL

  B. Cloud Spanner

  C. Cloud Firestore

  D. Cloud Datastore

  Correct Answer: B

  Cloud Firestore and Cloud Datastore - can easily be eliminated doesn't fall under Relational DB

• Question 26:

  You have a website hosted on App Engine standard environment. You want 1% of your users to see a new test version of the website. You want to minimize complexity. What should you do?

  A. Deploy the new version in the same application and use the --migrate option.

  B. Deploy the new version in the same application and use the --splits option to give a weight of 99 to the current version and a weight of 1 to the new version.

  C. Create a new App Engine application in the same project. Deploy the new version in that application. Use the App Engine library to proxy 1% of the requests to the new version.

  D. Create a new App Engine application in the same project. Deploy the new version in that application. Configure your network load balancer to send 1% of the traffic to that new application.

  Correct Answer: B

  B is the correct answer as there is only one app engine can be created per project

• Question 27:

  Your projects incurred more costs than you expected last month. Your research reveals that a development GKE container emitted a huge number of logs, which resulted in higher costs. You want to disable the logs quickly using the minimum number of steps. What should you do?

  A. 1. Go to the Logs ingestion window in Stackdriver Logging, and disable the log source for the GKE container resource.

  B. 1. Go to the Logs ingestion window in Stackdriver Logging, and disable the log source for the GKE Cluster Operations resource.

  C. 1. Go to the GKE console, and delete existing clusters.

  2.

  Recreate a new cluster.

  3.

  Clear the option to enable legacy Stackdriver Logging.

  D. 1. Go to the GKE console, and delete existing clusters.

  2.

  Recreate a new cluster.

  3.

  Clear the option to enable legacy Stackdriver Monitoring.

  Correct Answer: A

  https://cloud.google.com/logging/docs/api/v2/resource-list

  GKE Containers have more log than GKE Cluster Operations:

  .-GKE Containe:

  cluster_name: An immutable name for the cluster the container is running in.

  namespace_id: Immutable ID of the cluster namespace the container is running in.

  instance_id: Immutable ID of the GCE instance the container is running in.

  pod_id: Immutable ID of the pod the container is running in.

  container_name: Immutable name of the container.

  zone: The GCE zone in which the instance is running.

  VS

  .-GKE Cluster Operations

  project_id: The identifier of the GCP project associated with this resource, such as "my-project".

  cluster_name: The name of the GKE Cluster.

  location: The location in which the GKE Cluster is running.

• Question 28:

  You are given a project with a single virtual private cloud (VPC) and a single subnetwork in the us-central1 region. There is a Compute Engine instance hosting an application in this subnetwork. You need to deploy a new instance in the same project in the europe-west1 region. This new instance needs access to the application. You want to follow Google-recommended practices. What should you do?

  A. 1. Create a subnetwork in the same VPC, in europe-west1.

  2. Create the new instance in the new subnetwork and use the first instance's private address as the endpoint.

  B. 1. Create a VPC and a subnetwork in europe-west1.

  2.

  Expose the application with an internal load balancer.

  3.

  Create the new instance in the new subnetwork and use the load balancer's address as the endpoint.

  C. 1. Create a subnetwork in the same VPC, in europe-west1.

  2.

  Use Cloud VPN to connect the two subnetworks.

  3.

  Create the new instance in the new subnetwork and use the first instance's private address as the endpoint.

  D. 1. Create a VPC and a subnetwork in europe-west1.

  2.

  Peer the 2 VPCs.

  3.

  Create the new instance in the new subnetwork and use the first instance's private address as the endpoint.

  Correct Answer: A

  VPC allows you to spawn multiple subnets in different zones. Routing is handled automatically (because Routers are created automatically).

  "use the first instance's private address as the endpoint" means that this new instance will be accessing the app via first intance's private IP (so there should be some routing rules created). Question says: "This new instance needs access to the application."

• Question 29:

  You have production and test workloads that you want to deploy on Compute Engine. Production VMs need to be in a different subnet than the test VMs. All the VMs must be able to reach each other over Internal IP without creating additional routes. You need to set up VPC and the 2 subnets. Which configuration meets these requirements?

  A. Create a single custom VPC with 2 subnets. Create each subnet in a different region and with a different CIDR range.

  B. Create a single custom VPC with 2 subnets. Create each subnet in the same region and with the same CIDR range.

  C. Create 2 custom VPCs, each with a single subnet. Create each subnet in a different region and with a different CIDR range.

  D. Create 2 custom VPCs, each with a single subnet. Create each subnet in the same region and with the same CIDR range.

  Correct Answer: A

  https://cloud.google.com/vpc/docs/using-vpc#subnet-rules

  Primary and secondary ranges for subnets cannot overlap with any allocated range, any primary or secondary range of another subnet in the same network, or any IP ranges of subnets in peered networks.

• Question 30:

  You need to create an autoscaling managed instance group for an HTTPS web application. You want to make sure that unhealthy VMs are recreated. What should you do?

  A. Create a health check on port 443 and use that when creating the Managed Instance Group.

  B. Select Multi-Zone instead of Single-Zone when creating the Managed Instance Group.

  C. In the Instance Template, add the label `health-check'.

  D. In the Instance Template, add a startup script that sends a heartbeat to the metadata server.

  Correct Answer: A

  MIGs support autohealing, load balancing, autoscaling, and auto-updating. no the Images templates, this is set up in the MIG