1500 Questions | Professional Cloud Developer 2026

Developing Cloud-Native Applications (19%): Selecting the right AWS services for modern apps and implementing robust CI/CD pipelines.

Designing and Implementing Serverless and Containerized Applications (20%): Deep dive into Lambda, Fargate, and ECS/EKS, focusing on performance optimization and security.

Implementing Cost Control and Optimization (24%): Identifying cost drivers, applying pricing strategies, and resource monitoring.

Securing the Cloud Infrastructure and Application (15%): Threat protection, identity management, and maintaining cloud governance/compliance.

B) Create one large private subnet spanning all three AZs with a single Route Table.

C) Create three private subnets, one in each AZ, each associated with a NAT Gateway.

D) Create three private subnets, one in each AZ, and use Network ACLs to restrict traffic.

E) Use a single public subnet and rely on Multi-AZ RDS replication for security.

F) Deploy the database in the default VPC without modifying the routing table.

Correct Answer: D

Explanation:

B) Incorrect: Subnets are bound to a single Availability Zone; they cannot span multiple AZs.

C) Incorrect: While private subnets are correct, a NAT Gateway is used for outbound traffic, not for defining internal HA database architecture.

D) Correct: Creating a private subnet in each AZ ensures high availability, while NACLs provide the required stateless security layer.

E) Incorrect: A public subnet exposes the database to the internet, regardless of RDS replication settings.

F) Incorrect: Default VPCs are often not optimized for professional, hardened architectures.

B) Use an Application Load Balancer instead of API Gateway.

C) Enable Provisioned Concurrency for the Lambda function.

D) Switch the runtime from Node.js to Java.

E) Deploy the Lambda function within a VPC.

F) Implement a SQS queue in front of the Lambda function.

Correct Answer: C

Explanation:

B) Incorrect: The entry point (ALB vs API Gateway) does not change the underlying Lambda initialization time.

C) Correct: Provisioned Concurrency keeps functions initialized and ready to respond in double-digit milliseconds, effectively eliminating cold starts.

D) Incorrect: Java typically has longer cold start times than Node.js due to the JVM initialization.

E) Incorrect: Deploying in a VPC can actually increase cold start times if not configured correctly with Hyperplane ENIs.

F) Incorrect: SQS makes the process asynchronous but doesn't solve the latency of the actual execution start.

B) Reserved Instances (3-year term).

C) Dedicated Hosts.

D) Spot Instances.

E) Savings Plans (1-year term).

F) Standard Pay-As-You-Go pricing.

Correct Answer: D

Explanation:

B) Incorrect: While cheaper than On-Demand, it requires a long-term commitment that isn't ideal for fault-tolerant, flexible batch jobs.

C) Incorrect: Dedicated hosts are expensive and usually used for specific licensing requirements.

D) Correct: Spot Instances offer up to 90% savings and are perfect for fault-tolerant workloads like batch processing.

E) Incorrect: Savings Plans offer great discounts but are generally less aggressive than the savings found in the Spot market.

F) Incorrect: This is synonymous with On-Demand and provides no optimization.

Welcome to the Exams Practice Tests Academy to help you prepare for your Professional Cloud Developer Certification.

This is a huge original question bank with 1,500 unique entries curated for the AWS ecosystem.

You get support from instructors if you have questions about specific cloud architectures.

Each question has a detailed explanation for every option, turning every test into a study session.

Mobile-compatible with the Udemy app so you can study for this 170-minute exam anywhere.

30-days money-back guarantee if you're not satisfied with the quality of the material.