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Amazon SAA-C03 Exam Syllabus Topics:

Section	Weight	Objectives
Design Secure Architectures	30%	- Secure access to AWS resources 1. Encryption in transit and at rest 2. IAM users, roles, and policies 3. AWS STS and temporary credentials - Secure workloads and applications 1. Security groups and NACLs 2. Data protection using KMS
Design Cost-Optimized Architectures	20%	- Cost management tools 1. AWS Cost Explorer 2. Budgets and billing alarms - Cost-effective resource selection 1. Right-sizing EC2 instances 2. Storage class optimization in S3
Design Resilient Architectures	26%	- Fault tolerance and recovery 1. Disaster recovery approaches 2. Backup and restore strategies - Highly available architecture 1. Auto Scaling groups 2. Multi-AZ deployments
Design High-Performing Architectures	24%	- Performance scaling 1. Caching with CloudFront and ElastiCache 2. Load balancing with ELB - Compute and storage optimization 1. EC2 instance selection 2. S3 performance features

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Amazon AWS Certified Solutions Architect - Associate Sample Questions (Q950-Q955):

NEW QUESTION # 950
A solutions architect must design a highly available infrastructure for a website. The website is powered by Windows web servers that run on Amazon EC2 instances. The solutions architect must implement a solution that can mitigate a large-scale DDoS attack that originates from thousands of IP addresses. Downtime is not acceptable for the website.
Which actions should the solutions architect take to protect the website from such an attack? (Select TWO.)

A. Use an AWS Lambda function to automatically add attacker IP addresses to VPC network ACLs.
B. Configure Amazon GuardDuty to automatically block the attackers.
C. Use EC2 Spot Instances in an Auto Scaling group with a target tracking scaling policy that is set to 80% CPU utilization
D. Use AWS Shield Advanced to stop the DDoS attack.
E. Configure the website to use Amazon CloudFront for both static and dynamic content.

Answer: D,E

Explanation:
(https://aws.amazon.com/cloudfront

NEW QUESTION # 951
A company is developing a two-tier web application on AWS. The company's developers have deployed the application on an Amazon EC2 instance that connects directly to a backend Amazon RDS database. The company must not hardcode database credentials in the application.
The company must also implement a solution to automatically rotate the database credentials on a regular basis. Which solution will meet these requirements with the LEAST operational overhead?

A. Store the database credentials in a configuration file in an encrypted Amazon S3 bucket. Use Amazon EventBridge (Amazon CloudWatch Events) rules to run a scheduled AWS Lambda function that updates the RDS credentials and the credentials in the configuration file at the same time. Use S3 Versioning to ensure the ability to fall back to previous values.
B. Store the database credentials as a secret in AWS Secrets Manager. Turn on automatic rotation for the secret. Attach the required permission to the EC2 role to grant access to the secret.
C. Store the database credentials in the instance metadata. Use Amazon EventBridge (Amazon CloudWatch Events) rules to run a scheduled AWS Lambda function that updates the RDS credentials and instance metadata at the same time.
D. Store the database credentials as encrypted parameters in AWS Systems Manager Parameter Store. Turn on automatic rotation for the encrypted parameters.Attach the required permission to the EC2 role to grant access to the encrypted parameters.

Answer: B

Explanation:
Secrets manager supports Autorotation unlike Parameter store.
AWS Secrets Manager is a service that enables you to easily rotate, manage, and retrieve database credentials, API keys, and other secrets throughout their lifecycle. By storing the database credentials as a secret in Secrets Manager, you can ensure that they are not hardcoded in the application and that they are automatically rotated on a regular basis. To grant the EC2 instance access to the secret, you can attach the required permission to the EC2 role.
This will allow the application to retrieve the secret from Secrets Manager as needed.
https://docs.aws.amazon.com/secretsmanager/latest/userguide/create_database_secret.html

NEW QUESTION # 952
A company's website handles millions of requests each day, and the number of requests continues to increase.
A solutions architect needs to improve the response time of the web application. The solutions architect determines that the application needs to decrease latency when retrieving product details from the Amazon DynamoDB table.
Which solution will meet these requirements with the LEAST amount of operational overhead?

A. Set up Amazon ElastiCache for Memcached between the DynamoDB table and the web application.
Route all read requests through Memcached.
B. Set up Amazon ElastiCache for Redis between the DynamoDB table and the web application. Route all read requests through Redis.
C. Set up Amazon DynamoDB Streams on the table, and have AWS Lambda read from the table and populate Amazon ElastiCache. Route all read requests through ElastiCache.
D. Set up a DynamoDB Accelerator (DAX) cluster. Route all read requests through DAX.

Answer: D

Explanation:
it allows the company to improve the response time of the web application and decrease latency when retrieving product details from the Amazon DynamoDB table. By setting up a DynamoDB Accelerator (DAX) cluster, the company can use a fully managed, highly available, in-memory cache for DynamoDB that delivers up to a 10x performance improvement. By routing all read requests through DAX, the company can reduce the number of read operations on the DynamoDB table and improve the user experience. References:
Amazon DynamoDB Accelerator (DAX)
Using DAX with DynamoDB

NEW QUESTION # 953
A company has an Amazon S3 bucket that contains critical data. The company must protect the data from accidental deletion.
Which combination of steps should a solutions architect take to meet these requirements? (Choose two.)

A. Enable MFA Delete on the S3 bucket.
B. Create a lifecycle policy for the objects in the S3 bucket.
C. Enable versioning on the S3 bucket.
D. Enable default encryption on the S3 bucket.
E. Create a bucket policy on the S3 bucket.

Answer: A,C

NEW QUESTION # 954
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. TheAmazon 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.)

A. Create a security group for the DB instance Add a rule to allow traffic from the public subnet CIDR block on port 3306
B. Create a network ACL for the public subnet Add a rule to deny outbound traffic to 0 0 0 0/0 on port
3306
C. Create a security group for the DB instance Add a rule to deny all traffic except traffic from the web servers' security group on port 3306
D. Create a security group for the web servers in the public subnet Add a rule to allow traffic from 0 0 0 O'O on port 443
E. Create a security group for the DB instance Add a rule to allow traffic from the web servers' security group on port 3306

Answer: A,D

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 forHTTPS4. This way, the web servers can accept secure connections from the internet on that port.

NEW QUESTION # 955
......

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