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Amazon SAA-C03 Exam Syllabus Topics:

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

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Amazon AWS Certified Solutions Architect - Associate Sample Questions (Q603-Q608):

NEW QUESTION # 603
A company maintains a searchable repository of items on its website. The data is stored in an Amazon RDS for MySQL database table that contains more than 10 million rows The database has 2 TB of General Purpose SSD storage There are millions of updates against this data every day through the company's website The company has noticed that some insert operations are taking 10 seconds or longer The company has determined that the database storage performance is the problem Which solution addresses this performance issue?

A. Change the DB instance to a burstable performance instance class
B. Change the DB instance to a memory optimized instance class
C. Enable Multi-AZ RDS read replicas with MySQL native asynchronous replication.
D. Change the storage type to Provisioned IOPS SSD

Answer: D

Explanation:
https://aws.amazon.com/ebs/features/
"Provisioned IOPS volumes are backed by solid-state drives (SSDs) and are the highest performance EBS volumes designed for your critical, I/O intensive database applications.
These volumes are ideal for both IOPS-intensive and throughput-intensive workloads that require extremely low latency."
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_Storage.html

NEW QUESTION # 604
A company hosts a two-tier application on Amazon EC2 instances and Amazon RDS. The application's demand varies based on the time of day. The load is minimal after work hours and on weekends. The EC2 instances run in an EC2 Auto Scaling group that is configured with a minimum of two instances and a maximum of five instances. The application must be available at all times, but the company is concerned about overall cost.
Which solution meets the availability requirement MOST cost-effectively?

A. Purchase EC2 Instance Savings Plans to cover two EC2 instances. Use up to three additional EC2 On-Demand Instances as needed. Purchase an RDS Reserved DB Instance.
B. Purchase two EC2 Reserved Instances Use up to three additional EC2 Spot Instances as needed. Stop the RDS database when it is not in use.
C. Purchase EC2 Instance Savings Plans to cover five EC2 instances. Purchase an RDS Reserved DB Instance
D. Use all EC2 Spot Instances. Stop the RDS database when it is not in use.

Answer: B

Explanation:
Explanation
This solution meets the requirements of a two-tier application that has a variable demand based on the time of day and must be available at all times, while minimizing the overall cost. EC2 Reserved Instances can provide significant savings compared to On-Demand Instances for the baseline level of usage, and they can guarantee capacity reservation when needed. EC2 Spot Instances can provide up to 90% savings compared to On-Demand Instances for any additional capacity that the application needs during peak hours. Spot Instances are suitable for stateless applications that can tolerate interruptions and can be replaced by other instances.
Stopping the RDS database when it is not in use can reduce the cost of running the database tier.
Option A is incorrect because using all EC2 Spot Instances can affect the availability of the application if there are not enough spare capacity or if the Spot price exceeds the maximum price. Stopping the RDS database when it is not in use can reduce the cost of running the database tier, but it can also affect the availability of the application. Option B is incorrect because purchasing EC2 Instance Savings Plans to cover five EC2 instances can lock in a fixed amount of compute usage per hour, which may not match the actual usage pattern of the application. Purchasing an RDS Reserved DB Instance can provide savings for the database tier, but it does not allow stopping the database when it is not in use. Option D is incorrect because purchasing EC2 Instance Savings Plans to cover two EC2 instances can lock in a fixed amount of compute usage per hour, which may not match the actual usage pattern of the application. Using up to three additional EC2 On-Demand Instances as needed can incur higher costs than using Spot Instances.
References:
* https://aws.amazon.com/ec2/pricing/reserved-instances/
* https://aws.amazon.com/ec2/spot/
* https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_StopInstance.html

NEW QUESTION # 605
A company has a serverless application on AWS that uses Amazon RDS as a backend database. The application sometimes experiences a sudden unpredictable increase in traffic. During traffic increases, the application frequently opens and closes connections to the database, which causes the application to receive errors from the database or run out of connections. The company needs to ensure that the application is always scalable and highly available.
Which solution will meet these requirements WITHOUT any code changes to the application?

A. Increase the maximum number of connections in the option group of the RDS database of the serverless application.
B. Deploy Amazon RDS Proxy between the serverless application and Amazon RDS.
C. Increase the instance size of the RDS DB instance to meet the peak load traffic.
D. Purchase Reserved Instances for Amazon RDS to ensure that the database is highly available during peak load traffic.

Answer: B

Explanation:
Amazon RDS Proxy is a fully managed database proxy that makes applications more scalable, more resilient to database failures, and more secure. RDS Proxy sits between your application and your relational database to pool and share established database connections, improving database efficiency and application scalability.
RDS Proxy also reduces the load on the database by handling connection management and query retries for transient errors. By deploying RDS Proxy between your serverless application and Amazon RDS, you can avoid opening and closing connections to the database frequently, which can cause errors or run out of connections. This solution will also reduce operational costs and improve availability of your application.
References: https://aws.amazon.com/rds/proxy/

NEW QUESTION # 606
A company has hired an external vendor to perform work in the company's AWS account. The vendor uses an automated tool that is hosted in an AWS account that the vendor owns. The vendor does not have IAM access to the company's AWS account.
How should a solutions architect grant this access to the vendor?

A. Create a new identity provider by choosing "AWS account" as the provider type in the IAM console. Supply the vendor's AWS account ID and user name. Attach the appropriate IAM policies to the new provider for the permissions that the vendor requires.
B. Create an IAM group in the company's account. Add the tool's IAM user from the vendor account to the group. Attach the appropriate IAM policies to the group for the permissions that the vendor requires.
C. Create an IAM user in the company's account with a password that meets the password complexity requirements. Attach the appropriate IAM policies to the user for the permissions that the vendor requires.
D. Create an IAM role in the company's account to delegate access to the vendor's IAM role. Attach the appropriate IAM policies to the role for the permissions that the vendor requires.

Answer: D

Explanation:
https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_common-scenarios_third-party.html

NEW QUESTION # 607
A company is launching a new gaming application. The company will use Amazon EC2 Auto Scaling groups to deploy the application. The application stores user data in a relational database.
The company has office locations around the world that need to run analytics on the user data in the database. The company needs a cost-effective database solution that provides cross-Region disaster recovery with low-latency read performance across AWS Regions.
Which solution will meet these requirements?

A. Create an Amazon ElastiCache for Redis cluster in the Region where the application is deployed. Create read replicas in Regions where the company offices are located. Ensure the company offices read from the read replica instances.
B. Create an Amazon RDS Multi-AZ DB cluster deployment in the Region where the application is deployed. Ensure the company offices read from read replica instances.
C. Create an Amazon Aurora global database. Configure the primary cluster to be in the Region where the application is deployed. Configure the secondary Aurora replicas to be in the Regions where the company offices are located. Ensure the company offices read from the Aurora replicas.
D. Create Amazon DynamoDB global tables. Deploy the tables to the Regions where the company offices are located and to the Region where the application is deployed. Ensure that each company office reads from the tables that are in the same Region as the office.

Answer: A

NEW QUESTION # 608
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