Question 919

A financial application requires a disaster recovery strategy with an RTO of 30 minutes and an RPO of 5 minutes. The company wants to minimize costs while ensuring the database is continuously replicated. Which strategy is most appropriate?

• ✅ A. Warm Standby
• ❌ B. Pilot Light
• ❌ C. Backup and Restore
• ❌ D. Multi-Site Active-Active

Question 920

A solutions architect is designing a system that must survive the failure of an entire Availability Zone with zero downtime for a payment processing API. Which concept does this requirement describe?

• ❌ A. Scalability
• ❌ B. Disaster Recovery
• ✅ C. Fault Tolerance
• ❌ D. High Availability

Question 921

An application is experiencing an issue where a single message is being processed by two different workers simultaneously. Which SQS parameter should be adjusted to prevent this?

• ✅ A. VisibilityTimeout
• ❌ B. MessageRetentionPeriod
• ❌ C. DelaySeconds
• ❌ D. WaitTimeSeconds

Question 922

A company wants to implement a 'Fan-out' pattern to send a single event to multiple independent downstream microservices while ensuring that messages are not lost if a service is down. Which architecture should be used?

• ✅ A. An SNS topic subscribed to multiple SQS queues
• ❌ B. EventBridge routing directly to EC2 instances
• ❌ C. An SNS topic with multiple HTTP endpoints
• ❌ D. An SQS queue with multiple Lambda triggers

Question 923

A serverless application using AWS Lambda frequently experiences 'too many connections' errors when connecting to a private Amazon RDS instance. How can this be resolved most effectively?

• ❌ A. Switch to an Aurora Serverless v2 database
• ❌ B. Move the Lambda function outside of the VPC
• ❌ C. Increase the memory of the Lambda function
• ✅ D. Implement Amazon RDS Proxy

Question 924

An Auto Scaling group (ASG) in a VPC with 3 AZs is scaling in. AZ-A has 3 instances, AZ-B has 2 instances, and AZ-C has 2 instances. Which instance will be terminated first according to the default policy?

• ✅ A. An instance in AZ-A with the oldest launch configuration
• ❌ B. The newest instance in AZ-A
• ❌ C. The instance in any AZ that is closest to the next billing hour
• ❌ D. An instance in AZ-B with the oldest launch configuration

Question 925

A developer needs to consistently eliminate cold-start latency for a Lambda-based checkout API during peak hours. Which feature should be used?

• ❌ A. Lambda@Edge
• ❌ B. Increase Lambda Timeout
• ✅ C. Provisioned Concurrency
• ❌ D. Reserved Concurrency

Question 926

A company wants to prevent users from accessing private S3 bucket objects directly via S3 URLs, requiring them to go through Amazon CloudFront. Which method is most appropriate?

• ❌ A. Configure Route 53 Alias records for the S3 bucket
• ❌ B. Use Security Group Referencing
• ✅ C. Enable Origin Access Control (OAC)
• ❌ D. Turn on S3 Block Public Access

Question 927

A legacy Linux application writes files to local disk and needs to scale horizontally across multiple EC2 instances. Which storage solution allows this without significant code changes?

• ❌ A. Amazon EBS Multi-Attach
• ❌ B. Amazon FSx for Lustre
• ✅ C. Amazon EFS
• ❌ D. Amazon S3 with S3 File Gateway

Question 928

A developer needs to guarantee the exact order of messages for a series of financial transactions being sent to a backend processor. Which SQS queue type is mandatory?

• ❌ A. Delay Queue
• ❌ B. Standard Queue
• ❌ C. Dead-Letter Queue
• ✅ D. FIFO Queue

Question 929

A financial company is deploying a mission-critical database cluster that requires consistent sub-millisecond latency and a high volume of provisioned IOPS. Which EBS volume type is specifically engineered to meet these extreme performance requirements?

• ❌ A. Throughput Optimized HDD (st1)
• ❌ B. General Purpose SSD (gp3)
• ❌ C. Provisioned IOPS SSD (io1)
• ✅ D. Provisioned IOPS SSD (io2 Block Express)

Question 930

An Amazon RDS instance has storage auto-scaling enabled with a maximum threshold of 500 GB. If the instance currently has 450 GB allocated and the next required scaling increment is 60 GB, how will the service behave?

• ❌ A. It will automatically increase the maximum threshold to 510 GB.
• ✅ B. It will not trigger the auto-scaling event.
• ❌ C. It will scale to 500 GB and stop.
• ❌ D. It will scale to 510 GB regardless of the threshold.

Question 931

A company is migrating a legacy application suite to AWS. They anticipate their compute needs will fluctuate between EC2 instances, AWS Lambda functions, and AWS Fargate over the next three years. They want to commit to a consistent amount of compute usage to minimize costs. Which purchasing option provides the required flexibility across these different compute types?

• ❌ A. Standard Reserved Instances
• ❌ B. Convertible Reserved Instances
• ❌ C. EC2 Instance Savings Plans
• ✅ D. Compute Savings Plans

Question 932

An analytics application uses an Amazon RDS MySQL Multi-AZ DB instance. During month-end processing, heavy read-only reporting queries cause the CPU utilization to reach 100%, significantly slowing down the primary write operations. What is the MOST cost-effective way to resolve this performance bottleneck?

• ❌ A. Enable RDS Storage Auto Scaling
• ✅ B. Create an RDS Read Replica and point reporting traffic to it
• ❌ C. Upgrade the DB instance to a larger instance class
• ❌ D. Migrate the database to Amazon Aurora Serverless v2

Question 933

A company has 50 different AWS accounts under one organization. They want to ensure that all accounts benefit from volume discounts on services like Amazon S3 and EC2. Which feature of AWS Organizations should they utilize?

• ❌ A. Service Control Policies (SCPs)
• ✅ B. Consolidated Billing
• ❌ C. Resource Access Manager (RAM)
• ❌ D. AWS Cost Explorer

Question 934

A solution architect is reviewing a network design where multiple EC2 instances in different Availability Zones (AZs) communicate frequently. The architect notices significant 'Data Transfer Out' charges on the bill. What is a likely cause of these charges related to AZ placement?

• ✅ A. Traffic is crossing Availability Zone boundaries
• ❌ B. The instances are using an Internet Gateway to communicate
• ❌ C. Instances are using Elastic IP addresses for communication
• ❌ D. The VPC has no VPC Peering connections configured

Question 935

To reduce the costs of a large-scale Amazon RDS database, a solution architect suggests moving product images that are stored as Binary Large Objects (BLOBs) into Amazon S3. What is the primary cost-saving benefit of this architectural change?

• ❌ A. S3 automatically scales IOPS for the relational database
• ❌ B. S3 Gateway Endpoints will reduce the cost of the SQL queries
• ❌ C. It enables the use of Aurora Serverless for the primary database
• ✅ D. S3 storage is significantly cheaper per GB than provisioned RDS storage