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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Design Cost-Optimized Architectures | 20% | - Cost-effective resource selection
|
| Topic 2: Design Secure Architectures | 30% | - Secure access to AWS resources
|
| Topic 3: Design High-Performing Architectures | 24% | - Performance scaling
|
| Topic 4: Design Resilient Architectures | 26% | - Highly available architecture
|
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NEW QUESTION # 929
A solutions architect is designing a two-tiered architecture that includes a public subnet and a database subnet.
The web servers in the public subnet must be open to the internet on port 443. The Amazon RDS for MySQL D6 instance in the database subnet must be accessible only to the web servers on port 3306.
Which combination of steps should the solutions architect take to meet these requirements? (Select TWO.)
Answer: A,E
Explanation:
Security groups are virtual firewalls that protect AWS instances and can be applied to EC2, ELB and RDS1
. Security groups have rules for inbound and outbound traffic and are stateful, meaning that responses to allowed inbound traffic are allowed to flow out of the instance2. Network ACLs are different from security groups in several ways. They cover entire subnets, not individual instances, and are stateless, meaning that they require rules for both inbound and outbound traffic2. Network ACLs also support deny rules, while security groups only support allow rules2.
To meet the requirements of the scenario, the solutions architect should create two security groups: one for the DB instance and one for the web servers in the public subnet. The security group for the DB instance should allow traffic from the public subnet CIDR block on port 3306, which is the default port for MySQL3. This way, only the web servers in the public subnet can access the DB instance on that port. The security group for the web servers should allow traffic from 0 0 0 O'O on port 443, which is the default port for HTTPS4. This way, the web servers can accept secure connections from the internet on that port.
NEW QUESTION # 930
A company provides an API interface to customers so the customers can retrieve their financial information.
The company expects a larger number of requests during peak usage times of the year.
The company requires the API to respond consistently with low latency to ensure customer satisfaction. The company needs to provide a compute host for the API.
Which solution will meet these requirements with the LEAST operational overhead?
Answer: C
Explanation:
Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale. AWS Lambda is a serverless compute service that lets you run code without provisioning or managing servers. Lambda scales automatically based on the incoming requests, but it may take some time to initialize new instances of your function if there is a sudden increase in demand. This may result in high latency or cold starts for your API. To avoid this, you can use provisioned concurrency, which ensures that your function is initialized and ready to respond at any time. Provisioned concurrency also helps you achieve consistent low latency for your API by reducing the impact of scaling on performance. References: https://docs.aws.amazon.com/apigateway/latest/developerguide/http-api-develop- integrations-lambda.html https://docs.aws.amazon.com/lambda/latest/dg/configuration-concurrency.html
NEW QUESTION # 931
A company uses Amazon EC2 instances and Amazon Elastic Block Store (Amazon EBS) volumes to run an application. The company creates one snapshot of each EBS volume every day.
The company needs to prevent users from accidentally deleting the EBS volume snapshots. The solution must not change the administrative rights of a storage administrator user.
Which solution will meet these requirements with the LEAST administrative effort?
Answer: C
Explanation:
Amazon EBS Snapshots Recycle Bin enables you to specify retention rules for EBS snapshots based on tags. When snapshots are deleted, they are retained in the Recycle Bin for a specified duration, preventing accidental deletion. Tag-level rules allow selective protection without changing IAM roles or user permissions.
Reference:
NEW QUESTION # 932
A company uses an Amazon Aurora PostgreSQL DB cluster to store its critical data in the us-east-1 Region.
The company wants to develop a disaster recovery plan to recover the database in the us-west-1 Region. The company has a recovery time objective (RTO) of 5 minutes and has a recovery point objective (RPO) of 1 minute.
What should a solutions architect do to meet these requirements?
Answer: D
Explanation:
* Aurora global database is specifically designed for cross-Region disaster recovery and low-latency global reads.
* It provides:
* Physical storage-level replication between Regions, typically with lag of under 1 second, easily satisfying RPO 1 minute.
* Fast cross-Region failover capabilities, often within minutes or less, which meets the RTO 5 minutes requirement.
* You configure the primary Region as the writer cluster and additional Regions (such as us-west-1) as secondary clusters with reader endpoints. In a disaster, you promote the secondary to be the new writer.
Why others are not correct:
* A: Standard cross-Region read replicas for Aurora PostgreSQL do not provide automatic multi-Region failover with the same guarantees as Aurora global database and may not meet strict RTO/RPO requirements.
* C: Logical replication and custom EventBridge failover is complex, error-prone, and higher overhead compared to the managed global database feature.
* D: Restoring from snapshots plus cross-Region replication is too slow to meet RTO 5 minutes and certainly cannot maintain RPO 1 minute.
NEW QUESTION # 933
A company hosts an application in an Amazon EC2 Auto Scaling group. The company has observed that during periods of high demand, new instances take too long to join the Auto Scaling group and serve the increased demand. The company determines that the root cause of the issue is the long boot time of the instances in the Auto Scaling group. The company needs to reduce the time required to launch new instances to respond to demand. Which solution will meet this requirement?
Answer: B
Explanation:
A warm pool is an Auto Scaling feature that keeps instances in a pre-initialized state so they can quickly join the active group when scaling is required. This reduces the time needed for instance bootstrapping and makes new capacity available almost instantly. Option A only increases capacity limits but does not address slow boot times. Option C merely extends grace periods without solving the delay. Option D forces overprovisioning, which is wasteful and not aligned with cost optimization. Using a warm pool (B) directly addresses the problem by reducing response time to scaling events.
Reference:
* Amazon EC2 Auto Scaling User Guide - Warm pools for scaling faster
* AWS Well-Architected Framework - Performance Efficiency Pillar: Optimizing responsiveness
NEW QUESTION # 934
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