CV0-004 Cloud Architecture and Design Practice Test 3 — 15 Questions

Question 1

A cloud architect is designing a cost-optimized architecture for a batch processing workload that runs every hour for 10 minutes. The workload is fault-tolerant and can be interrupted. Which TWO pricing models should the architect consider to minimize costs? (Select TWO.)

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

On-demand instances. On-demand instances (C) are correct because they allow the architect to pay only for the compute capacity used per hour, with no upfront commitment, which is ideal for a short-duration (10-minute) batch workload that runs every hour. Spot instances (D) are correct because the workload is fault-tolerant and can be interrupted, enabling the use of spare cloud capacity at significantly discounted rates (often 60-90% off on-demand), further minimizing costs for this interruptible batch processing task.

Answer

Dedicated hosts

Answer

Savings plans

Answer

Reserved instances

Question 2

A company decides to use AWS for compute and Azure for storage to leverage best-of-breed services. This is an example of which cloud deployment model?

Accepted Answer

Multi-cloud. Multi-cloud refers to using multiple public cloud providers simultaneously.

Answer

Community cloud

Answer

Public cloud

Answer

Hybrid cloud

Question 3

A company runs a web application on AWS EC2 instances behind an Application Load Balancer. They want to handle traffic spikes automatically. Which scaling approach should they implement?

Accepted Answer

Auto-scaling. Auto-scaling adds or removes instances based on metrics like CPU utilization, handling traffic spikes automatically.

Answer

Vertical scaling

Answer

Manual scaling

Answer

Horizontal scaling

Question 4

Which cloud service model provides the customer with the most control over the operating system and applications?

Accepted Answer

IaaS. IaaS provides virtualized computing resources where customers manage OS and above.

Answer

FaaS

Answer

PaaS

Answer

SaaS

Question 5

A company deploys a stateless web application across two AWS Availability Zones behind a load balancer. This design primarily improves which characteristic?

Accepted Answer

High availability. Deploying across multiple AZs with a load balancer increases availability by eliminating single points of failure.

Answer

Cost efficiency

Answer

Scalability

Answer

Security

Question 6

A cloud architect is designing a VPC with public and private subnets. Which component is required to allow instances in the private subnet to access the internet for software updates?

Accepted Answer

NAT gateway. A NAT gateway is required to enable instances in a private subnet to initiate outbound connections to the internet (e.g., for software updates) while preventing the internet from initiating inbound connections to those instances. It translates the private IP addresses of the instances to the NAT gateway's Elastic IP address using source network address translation (SNAT). An Internet gateway alone cannot serve private subnets because it requires a route table entry pointing to a public subnet with a public IP address.

Answer

Elastic IP

Answer

VPN connection

Answer

Internet gateway

Question 7

An organization wants to minimize costs for a batch processing workload that runs nightly for 2 hours and can tolerate interruptions. Which pricing model is most cost-effective?

Accepted Answer

Spot instances. Spot instances offer significant discounts but can be terminated; suitable for fault-tolerant, interruptible workloads.

Answer

On-demand instances

Answer

Reserved instances

Answer

Dedicated hosts

Question 8

A company uses Azure and needs shared file storage accessible from multiple Linux VMs using standard file sharing protocols. Which storage type should they choose?

Accepted Answer

Azure Files. Azure Files provides managed file shares accessible via SMB and NFS protocols.

Answer

Azure Archive Storage

Answer

Azure Disk Storage

Answer

Azure Blob Storage

Question 9

Which cloud characteristic allows a user to provision additional resources automatically without requiring human intervention?

Accepted Answer

Rapid elasticity. Rapid elasticity enables automatic scaling of resources based on demand.

Answer

Measured service

Answer

Resource pooling

Answer

Broad network access

Question 10

A company deploys a multi-region active-active application on AWS. They use Route 53 with a latency routing policy. Traffic from Europe is routed to the eu-west-1 region, but during a regional failure, some European users experience timeouts. Which routing policy should be added to improve availability?

Accepted Answer

Latency-based routing with health checks and failover. Combining latency with failover routing provides automatic failover to a healthy region.

Answer

Geolocation routing

Answer

Failover routing

Answer

Weighted routing

Question 11

An organization needs to connect its on-premises data center to a public cloud with a dedicated, low-latency, and consistent network connection. Which connectivity option should they use?

Accepted Answer

Direct Connect. Direct Connect (AWS) or ExpressRoute (Azure) provides dedicated private connectivity from on-premises to cloud.

Answer

Internet gateway

Answer

VPC peering

Answer

Site-to-site VPN

Question 12

Which of the following is a key benefit of using object storage like Amazon S3 over block storage?

Accepted Answer

Unlimited scalability for unstructured data. Amazon S3 is designed for unlimited scalability, allowing you to store and retrieve any amount of unstructured data (e.g., images, videos, backups) without provisioning storage in advance. Unlike block storage, which has fixed size limits per volume, S3 automatically scales to accommodate petabytes of data, making it ideal for modern cloud-native applications.

Answer

Direct attachment to a single VM

Answer

Supports file-level locking

Answer

Lower latency for database workloads

Question 13

A company wants to migrate a stateful application to the cloud but needs to ensure it can scale horizontally. What architectural change is required?

Accepted Answer

Move session state to a shared database or cache. Horizontal scaling requires stateless application design; sessions must be externalized to a shared data store.

Answer

Deploy in multiple availability zones

Answer

Implement sticky sessions on the load balancer

Answer

Use larger instance types

Question 14

A cloud architect is designing a disaster recovery plan for a critical application. Which TWO metrics should be defined to establish recovery objectives?

Accepted Answer

RPO (Recovery Point Objective). RTO and RPO are the key metrics for disaster recovery: time to recover and acceptable data loss.

Answer

MTBF (Mean Time Between Failures)

Answer

SLA (Service Level Agreement)

Answer

MTTR (Mean Time to Repair)

Question 15

A company is selecting a cloud deployment model. They require the ability to keep sensitive data on-premises due to regulatory compliance, but want to leverage cloud resources for burst computing capacity. Which THREE characteristics describe this model?

Accepted Answer

Provides the ability to burst to the cloud for extra capacity. Hybrid cloud connects on-premises with public cloud, enabling data residency and bursting.

Answer

Uses multiple public cloud providers

Answer

Resources are exclusively owned by one organization