CV0-004 Cloud Architecture and Design — 10 Questions

Question 1

An organization needs to recover its critical database within 15 minutes and lose at most 1 minute of data. Which configuration meets these requirements?

Accepted Answer

Hot standby with synchronous replication. Hot standby with synchronous replication ensures that every write to the primary database is also written to the standby before the transaction is acknowledged. This guarantees zero data loss (RPO=0) and, combined with automatic failover, can achieve a recovery time of under 15 minutes (RTO<15 min).

Answer

Active-active with asynchronous replication

Answer

Warm standby with hourly backups

Answer

Cold standby with daily backups

Question 2

A company wants to migrate its on-premises workload to the cloud and needs to maintain full control over the operating system, middleware, and applications. Which cloud service model should the company choose?

Accepted Answer

IaaS. IaaS provides virtualized computing resources (VMs, storage, networking) where the customer manages the OS and above, making it the right choice for full control.

Answer

PaaS

Answer

FaaS

Answer

SaaS

Question 3

Which cloud deployment model connects an on-premises data center to a public cloud using VPN or dedicated connections like AWS Direct Connect?

Accepted Answer

Hybrid cloud. Hybrid cloud integrates on-premises and public cloud resources via private networking.

Answer

Private cloud

Answer

Multi-cloud

Answer

Public cloud

Question 4

A cloud architect is designing a highly available web application. The application must remain available even if an entire AWS Availability Zone fails. The architect decides to deploy identical application instances in two separate Availability Zones and distribute traffic equally. Which architecture is being implemented?

Accepted Answer

Active-active. Active-active architecture distributes traffic across all instances; if one zone fails, the other continues serving traffic.

Answer

Fault tolerance

Answer

Warm standby

Answer

Active-passive

Question 5

A company runs a stateless web application on virtual machines. To handle increased traffic, they add more virtual machines and distribute incoming requests among them. What is this scaling method called?

Accepted Answer

Horizontal scaling. Horizontal scaling adds more instances to handle load, as opposed to vertical scaling which increases the resources of a single instance.

Answer

Right-sizing

Answer

Vertical scaling

Answer

Auto-scaling

Question 6

A cloud engineer needs to store database backups that must be retained for seven years. The backups are rarely accessed. Which storage type is most cost-effective for this use case?

Accepted Answer

Archive storage. Archive storage (like Glacier or Azure Archive) is designed for long-term cold storage at low cost.

Answer

Object storage

Answer

Block storage

Answer

File storage

Question 7

A company uses AWS and Azure for redundancy. They deploy the same application on both clouds to avoid vendor lock-in and improve disaster recovery. Which cloud deployment model is this?

Accepted Answer

Multi-cloud. Multi-cloud uses multiple public cloud providers for redundancy and best-of-breed services.

Answer

Community cloud

Answer

Hybrid cloud

Answer

Private cloud

Question 8

Which of the following is a characteristic of serverless computing (FaaS)?

Accepted Answer

You are charged per execution or compute time. FaaS executes code in response to events and charges only for the compute time consumed.

Answer

You pay for allocated resources regardless of usage

Answer

You must manage the underlying servers

Answer

You have to provision capacity in advance

Question 9

A company wants to minimize cloud costs for a batch processing job that runs for a few hours each night and can be interrupted. Which pricing model is most appropriate?

Accepted Answer

Spot instances. Spot/preemptible instances offer significant discounts but can be terminated if capacity is needed elsewhere, suitable for fault-tolerant and interruptible workloads.

Answer

Dedicated hosts

Answer

On-demand instances

Answer

Reserved instances

Question 10

An organization is designing a VPC with public and private subnets. The web servers must be accessible from the internet, but database servers must not. The architecture also requires high availability across two Availability Zones. What is the minimum number of public subnets and private subnets needed?

Accepted Answer

Two public, two private. For high availability across two AZs, you need at least two public subnets (one per AZ) and two private subnets (one per AZ).

Answer

One public, two private

Answer

Two public, one private

Answer

One public, one private