Free Professional-Cloud-Architect Practice Exam Questions

Topic 3, JencoMart Case Study

Company Overview
JencoMart is a global retailer with over 10,000 stores in 16 countries. The stores carry a range of goods, such
as groceries, tires, and jewelry. One of the company’s core values is excellent customer service. In addition,
they recently introduced an environmental policy to reduce their carbon output by 50% over the next 5 years.
Company Background
JencoMart started as a general store in 1931, and has grown into one of the world’s leading brands known for
great value and customer service. Over time, the company transitioned from only physical stores to a stores
and online hybrid model, with 25% of sales online. Currently, JencoMart has little presence in Asia, but
considers that market key for future growth.
Solution Concept
JencoMart wants to migrate several critical applications to the cloud but has not completed a technical review
to determine their suitability for the cloud and the engineering required for migration. They currently host all
of these applications on infrastructure that is at its end of life and is no longer supported.
Existing Technical Environment
JencoMart hosts all of its applications in 4 data centers: 3 in North American and 1 in Europe, most
applications are dual-homed.
JencoMart understands the dependencies and resource usage metrics of their on-premises architecture.
Application Customer loyalty portal
LAMP (Linux, Apache, MySQL and PHP) application served from the two JencoMart-owned U.S. data
centers.
Database
• Oracle Database stores user profiles
20 TB
Complex table structure
Well maintained, clean data
Strong backup strategy
• PostgreSQL database stores user credentials
Single-homed in US West
No redundancy
Backed up every 12 hours
100% uptime service level agreement (SLA)
Authenticates all users
Compute
• 30 machines in US West Coast, each machine has:
Twin, dual core CPUs
32GB of RAM
Twin 250 GB HDD (RAID 1)
• 20 machines in US East Coast, each machine has:
Single dual-core CPU
24 GB of RAM
Twin 250 GB HDD (RAID 1)
Storage
• Access to shared 100 TB SAN in each location
• Tape backup every week
Business Requirements
• Optimize for capacity during peak periods and value during off-peak periods
• Guarantee service availably and support
• Reduce on-premises footprint and associated financial and environmental impact.
• Move to outsourcing model to avoid large upfront costs associated with infrastructure purchase
• Expand services into Asia.
Technical Requirements
• Assess key application for cloud suitability.
• Modify application for the cloud.
• Move applications to a new infrastructure
• Leverage managed services wherever feasible
• Sunset 20% of capacity in existing data centers
• Decrease latency in Asia
CEO Statement
JencoMart will continue to develop personal relationships with our customers as more people access the web.
The future of our retail business is in the global market and the connection between online and in-store
experiences. As a large global company, we also have a responsibility to the environment through ‘green’
initiatives and polices.
CTO Statement
The challenges of operating data centers prevents focus on key technologies critical to our long-term success.
Migrating our data services to a public cloud infrastructure will allow us to focus on big data and machine
learning to improve our service customers.
CFO Statement
Since its founding JencoMart has invested heavily in our data services infrastructure. However, because of
changing market trends, we need to outsource our infrastructure to ensure our long-term success. This model
will allow us to respond to increasing customer demand during peak and reduce costs.

For this question, refer to the JencoMart case study
A few days after JencoMart migrates the user credentials database to Google Cloud Platform and shuts down
the old server, the new database server stops responding to SSH connections. It is still serving database
requests to the application servers correctly. What three steps should you take to diagnose the problem?
Choose 3 answers

Delete the virtual machine (VM) and disks and create a new one.

Delete the instance, attach the disk to a new VM, and investigate.

Take a snapshot of the disk and connect to a new machine to investigate.

Check inbound firewall rules for the network the machine is connected to.

Connect the machine to another network with very simple firewall rules and investigate.

Print the Serial Console output for the instance for troubleshooting, activate the interactive console, and
investigate.

Take a snapshot of the disk and connect to a new machine to investigate.

Check inbound firewall rules for the network the machine is connected to.

Connect the machine to another network with very simple firewall rules and investigate.

https://cloud.google.com/compute/docs/troubleshooting/troubleshooting-ssh

For this question, refer to the JencoMart case study.
JencoMart wants to move their User Profiles database to Google Cloud Platform. Which Google Database should they use?

Cloud Spanner

Google BigQuery

Google Cloud SQL

Google Cloud Datastore

https://cloud.google.com/datastore/docs/concepts/overview

For this question, refer to the JencoMart case study.
The JencoMart security team requires that all Google Cloud Platform infrastructure is deployed using a least
privilege model with separation of duties for administration between production and development resources.
What Google domain and project structure should you recommend?

Create two G Suite accounts to manage users: one for development/test/staging and one for production.
Each account should contain one project for every application.

Create two G Suite accounts to manage users: one with a single project for all development applications
and one with a single project for all production applications.

Create a single G Suite account to manage users with each stage of each application in its own project.

Create a single G Suite account to manage users with one project for the development/test/staging
environment and one project for the production environment.

Create two G Suite accounts to manage users: one for development/test/staging and one for production.
Each account should contain one project for every application.

https://cloud.google.com/docs/enterprise/best-practices-for-enterprise-organizations#projects-and-access

Question #:24 - (Exam Topic 4)
For this question, refer to the Dress4Win case study.
Dress4Win has asked you for advice on how to migrate their on-premises MySQL deployment to the cloud.
They want to minimize downtime and performance impact to their on-premises solution during the migration.
Which approach should you recommend?

Create a dump of the on-premises MySQL master server, and then shut it down, upload it to the cloud
environment, and load into a new MySQL cluster.

Setup a MySQL replica server/slave in the cloud environment, and configure it for asynchronous
replication from the MySQL master server on-premises until cutover.

Create a new MySQL cluster in the cloud, configure applications to begin writing to both on-premises
and cloud MySQL masters, and destroy the original cluster at cutover.

Create a dump of the MySQL replica server into the cloud environment, load it into: Google Cloud
Datastore, and configure applications to read/write to Cloud Datastore at cutover.

Setup a MySQL replica server/slave in the cloud environment, and configure it for asynchronous
replication from the MySQL master server on-premises until cutover.

For this question, refer to the Dress4Win case study.
The Dress4Win security team has disabled external SSH access into production virtual machines (VMs) on Google Cloud Platform (GCP). The operations team needs to remotely manage the VMs, build and push Docker containers, and manage Google Cloud Storage objects. What can they do?

Grant the operations engineers access to use Google Cloud Shell.

Configure a VPN connection to GCP to allow SSH access to the cloud VMs.

Develop a new access request process that grants temporary SSH access to cloud VMs when an
operations engineer needs to perform a task.

Have the development team build an API service that allows the operations team to execute specific
remote procedure calls to accomplish their tasks

Configure a VPN connection to GCP to allow SSH access to the cloud VMs.

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