Google Professional-Cloud-Network-Engineer Exam Questions Free Practice Test

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Questions # 21:

You need to establish network connectivity between three Virtual Private Cloud networks, Sales, Marketing, and Finance, so that users can access resources in all three VPCs. You configure VPC peering between the Sales VPC and the Finance VPC. You also configure VPC peering between the Marketing VPC and the Finance VPC. After you complete the configuration, some users cannot connect to resources in the Sales VPC and the Marketing VPC. You want to resolve the problem.

What should you do?

Options:

Configure VPC peering in a full mesh.

Alter the routing table to resolve the asymmetric route.

Create network tags to allow connectivity between all three VPCs.

Delete the legacy network and recreate it to allow transitive peering.

Expert Solution

Questions # 22:

Your organization is developing a landing zone architecture with the following requirements:

There should be no communication between production and non-production environments.

Communication between applications within an environment may be necessary.

Network administrators should centrally manage all network resources, including subnets, routes, and firewall rules.

Each application should be billed separately.

Developers of an application within a project should have the autonomy to create their compute resources.

Up to 1000 applications are expected per environment.

You need to create a design that accommodates these requirements. What should you do?

Options:

Create a design where each project has its own VPC. Ensure all VPCs are connected by a Network Connectivity Center hub that is centrally managed by the network team.

Create a design that implements a single Shared VPC. Use VPC firewall rules with secure tags to enforce micro-segmentation between environments.

Create a design that has one host project with a Shared VPC for the production environment, another host project with a Shared VPC for the non-production environment, and a service project that is associated with the corresponding host project for each initiative.

Create a design that has a Shared VPC for each project. Implement hierarchical firewall policies to apply micro-segmentation between VPCs.

Expert Solution

Questions # 23:

Question:

You are configuring the firewall endpoints as part of the Cloud Next Generation Firewall (Cloud NGFW) intrusion prevention service in Google Cloud. You have configured a threat prevention security profile, and you now need to create an endpoint for traffic inspection. What should you do?

Options:

Attach the profile to the VPC network, create a firewall endpoint within the zone, and use a firewall policy rule to apply the L7 inspection.

Create a firewall endpoint within the zone, associate the endpoint to the VPC network, and use a firewall policy rule to apply the L7 inspection.

Create a firewall endpoint within the region, associate the endpoint to the VPC network, and use a firewall policy rule to apply the L7 inspection.

Create a Private Service Connect endpoint within the zone, associate the endpoint to the VPC network, and use a firewall policy rule to apply the L7 inspection.

Expert Solution

Questions # 24:

You are migrating to Cloud DNS and want to import your BIND zone file.

Which command should you use?

Options:

gcloud dns record-sets import ZONE_FILE --zone MANAGED_ZONE

gcloud dns record-sets import ZONE_FILE --replace-origin-ns --zone MANAGED_ZONE

gcloud dns record-sets import ZONE_FILE --zone-file-format --zone MANAGED_ZONE

gcloud dns record-sets import ZONE_FILE --delete-all-existing --zone MANAGED ZONE

Expert Solution

Questions # 25:

You created a new VPC network named Dev with a single subnet. You added a firewall rule for the network Dev to allow HTTP traffic only and enabled logging. When you try to log in to an instance in the subnet via Remote Desktop Protocol, the login fails. You look for the Firewall rules logs in Stackdriver Logging, but you do not see any entries for blocked traffic. You want to see the logs for blocked traffic.

What should you do?

Options:

Check the VPC flow logs for the instance.

Try connecting to the instance via SSH, and check the logs.

Create a new firewall rule to allow traffic from port 22, and enable logs.

Create a new firewall rule with priority 65500 to deny all traffic, and enable logs.

Expert Solution

Questions # 26:

(You are developing an internet of things (IoT) application that captures sensor data from multiple devices that have already been set up. You need to identify the global data storage product your company should use to store this data. You must ensure that the storage solution you choose meets your requirements of sub-millisecond latency. What should you do?)

Options:

Store the IoT data in Spanner. Use caches to speed up the process and avoid latencies.

Store the IoT data in Bigtable.

Capture IoT data in BigQuery datasets.

Store the IoT data in Cloud Storage. Implement caching by using Cloud CDN.

Expert Solution

Answer

Explanation

Comprehensive and Detailed In Depth Explanation:

Let's evaluate each option based on the requirement of sub-millisecond latency for globally stored IoT data:

A. Spanner with Caching: While Spanner offers strong consistency and global scalability, the base latency might not consistently be sub-millisecond for all read/write operations globally. Introducing caching adds complexity and doesn't guarantee sub-millisecond latency for all initial reads or cache misses.

B. Bigtable: Bigtable is a highly scalable NoSQL database service designed for low-latency, high-throughput workloads. It excels at storing and retrieving large volumes of time-series data, which is typical for IoT sensor data. Its architecture is optimized for single-key lookups and scans, providing consistent sub-millisecond latency, making it a strong candidate for this use case.

C. BigQuery: BigQuery is a fully managed, serverless data warehouse designed for analytical queries on large datasets. While it's excellent for analyzing IoT data in batch, it's not optimized for the low-latency, high-throughput ingestion and retrieval required for real-time IoT applications with sub-millisecond latency needs.

D. Cloud Storage with Cloud CDN: Cloud Storage is object storage and is not designed for low-latency transactional workloads. Cloud CDN is a content delivery network that caches content closer to users for faster delivery, but it's not suitable for the primary storage of rapidly incoming IoT sensor data requiring sub-millisecond write latency.

Google Cloud Documentation References:

Cloud Bigtable Overview: https://cloud.google.com/bigtable/docs/overview - This document highlights Bigtable 's suitability for low-latency and high-throughput applications, including IoT. It mentions its ability to handle massive amounts of data with consistent performance.

Spanner Overview: https://cloud.google.com/spanner/docs/overview - While Spanner offers low latency, Bigtable is generally preferred for extremely high-throughput, low-latency use cases like raw sensor data ingestion due to its optimized architecture for such workloads.

BigQuery Overview: https://cloud.google.com/bigquery/docs/introduction - This emphasizes BigQuery 's analytical capabilities rather than low-latency operational workloads.

Cloud Storage Overview: https://cloud.google.com/storage/docs/overview - This describes Cloud Storage as object storage, not ideal for sub-millisecond latency reads and writes required for real-time IoT data.

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Questions # 27:

You want Cloud CDN to serve the https://www.example.com/images/spacetime.png static image file that is hosted in a private Cloud Storage bucket, You are using the VSE ORIG.-X_NZADERS cache mode You receive an HTTP 403 error when opening the file In your browser and you see that the HTTP response has a Cache-control: private, max-age=O header How should you correct this Issue?

Options:

Configure a Cloud Storage bucket permission that gives the Storage Legacy Object Reader role

Change the cache mode to cache all content.

Increase the default time-to-live (TTL) for the backend service.

Enable negative caching for the backend bucket

Expert Solution

Questions # 28:

You have an application that is running in a managed instance group. Your development team has released an updated instance template which contains a new feature which was not heavily tested. You want to minimize impact to users if there is a bug in the new template.

How should you update your instances?

Options:

Manually patch some of the instances, and then perform a rolling restart on the instance group.

Using the new instance template, perform a rolling update across all instances in the instance group. Verify the new feature once the rollout completes.

Deploy a new instance group and canary the updated template in that group. Verify the new feature in the new canary instance group, and then update the original instance group.

Perform a canary update by starting a rolling update and specifying a target size for your instances to receive the new template. Verify the new feature on the canary instances, and then roll forward to the rest of the instances.

Expert Solution

Questions # 29:

All the instances in your project are configured with the custom metadata enable-oslogin value set to FALSE and to block project-wide SSH keys. None of the instances are set with any SSH key, and no project-wide SSH keys have been configured. Firewall rules are set up to allow SSH sessions from any IP address range. You want to SSH into one instance.

What should you do?

Options:

Open the Cloud Shell SSH into the instance using gcloud compute ssh.

Set the custom metadata enable-oslogin to TRUE, and SSH into the instance using a third-party tool like putty or ssh.

Generate a new SSH key pair. Verify the format of the private key and add it to the instance. SSH into the instance using a third-party tool like putty or ssh.

Generate a new SSH key pair. Verify the format of the public key and add it to the project. SSH into the instance using a third-party tool like putty or ssh.

Expert Solution

Questions # 30:

You create a Google Kubernetes Engine private cluster and want to use kubectl to get the status of the pods. In one of your instances you notice the master is not responding, even though the cluster is up and running.

What should you do to solve the problem?

Options:

Assign a public IP address to the instance.

Create a route to reach the Master, pointing to the default internet gateway.

Create the appropriate firewall policy in the VPC to allow traffic from Master node IP address to the instance.

Create the appropriate master authorized network entries to allow the instance to communicate to the master.

Expert Solution

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