Amazon
SAA-C03 Exam
Questions

AWS Certified Solutions Architect - Associate SAA-C03

Amazon (SAA-C03) Exam Questions And Answers page 53

Which Amazon EBS volume type is suitable for an application requiring millisecond latency for small file system operations?

Single Choice

An application is running on an Amazon EC2 instance and must have millisecond latency when running the workload. The application makes many small reads and writes to the file system, but the file system itself is small.

Which Amazon Elastic Block Store (Amazon EBS) volume type should a solutions architect attach to their EC2 instance?

Cold HDD (sc1)

General Purpose SSD (gp2)

Provisioned IOPS SSD (io1)

Throughput Optimized HDD (st1)

Define Performant Architectures

What is the most cost-effective compute instance purchase strategy for a long-term DEV and PROD environment?

Single Choice

An application requires a development environment (DEV) and production environment (PROD) for several years. The DEV instances will run for 10 hours each day during normal business hours, while the PROD instances will run 24 hours each day. A solutions architect needs to determine a compute instance purchase strategy to minimize costs.

Which solution is the MOST cost-effective?

DEV with Spot Instances and PROD with On-Demand Instances

DEV with On-Demand Instances and PROD with Spot Instances

DEV with Scheduled Reserved Instances and PROD with Reserved Instances

DEV with On-Demand Instances and PROD with Scheduled Reserved Instances

Design Cost-Optimized Architectures

How to enable secure access between EC2 instances in separate VPCs across different AWS accounts?

Single Choice

An application running on an Amazon EC2 instance in VPC-A needs to access files in another EC2 instance in VPC-B. Both are in separate. AWS accounts. The network administrator needs to design a solution to enable secure access to EC2 instance in VPC-B from VPC-A. The connectivity should not have a single point of failure or bandwidth concerns.

Which solution will meet these requirements?

Set up a VPC peering connection between VPC-A and VPC-B.

Set up VPC gateway endpoints for the EC2 instance running in VPC-B.

Attach a virtual private gateway to VPC-B and enable routing from VPC-A.

Create a private virtual interface (VIF) for the EC2 instance running in VPC-B and add appropriate routes from VPC-B.

Specify Secure Applications and Architectures Design Cost-Optimized Architectures

How can a solutions architect configure least privilege access to a DynamoDB table from an EC2 instance?

Single Choice

An application running on an Amazon EC2 instance needs to access an Amazon DynamoDB table. Both the EC2 instance and the DynamoDB table are in the same AWS account. A solutions architect must configure the necessary permissions.

Which solution will allow least privilege access to the DynamoDB table from the EC2 instance?

Create an IAM role with the appropriate policy to allow access to the DynamoDB table. Create an instance profile to assign this IAM role to the EC2 instance.

Create an IAM role with the appropriate policy to allow access to the DynamoDB table. Add the EC2 instance to the trust relationship policy document to allow it to assume the role.

Create an IAM user with the appropriate policy to allow access to the DynamoDB table. Store the credentials in an Amazon S3 bucket and read them from within the application code directly.

Create an IAM user with the appropriate policy to allow access to the DynamoDB table. Ensure that the application stores the IAM credentials securely on local storage and uses them to make the DynamoDB calls.

Specify Secure Applications and Architectures

How can a solutions architect separate read and write requests in an Amazon Aurora Multi-AZ deployment?

Single Choice

An application running on AWS uses an Amazon Aurora Multi-AZ deployment for its database. When evaluating performance metrics, a solutions architect discovered that the database reads are causing high I/O and adding latency to the write requests against the database.

What should the solutions architect do to separate the read requests from the write requests?

Enable read-through caching on the Amazon Aurora database.

Update the application to read from the Multi-AZ standby instance.

Create a read replica and modify the application to use the appropriate endpoint.

Create a second Amazon Aurora database and link it to the primary database as a read replica.

Define Performant Architectures

Correct Answer:

Create a read replica and modify the application to use the appropriate endpoint.

Explanation:

Amazon RDS Read Replicas
Amazon RDS Read Replicas provide enhanced performance and durability for RDS database (DB) instances. They make it easy to elastically scale out beyond the capacity constraints of a single DB instance for read-heavy database workloads. You can create one or more replicas of a given source DB Instance and serve high-volume application read traffic from multiple copies of your data, thereby increasing aggregate read throughput. Read replicas can also be promoted when needed to become standalone DB instances. Read replicas are available in Amazon RDS for MySQL, MariaDB, PostgreSQL, Oracle, and SQL Server as well as Amazon Aurora.
For the MySQL, MariaDB, PostgreSQL, Oracle, and SQL Server database engines, Amazon RDS creates a second DB instance using a snapshot of the source DB instance. It then uses the engines' native asynchronous replication to update the read replica whenever there is a change to the source DB instance. The read replica operates as a DB instance that allows only read-only connections; applications can connect to a read replica just as they would to any DB instance. Amazon RDS replicates all databases in the source DB instance.
Amazon Aurora further extends the benefits of read replicas by employing an SSD-backed virtualized storage layer purpose-built for database workloads. Amazon Aurora replicas share the same underlying storage as the source instance, lowering costs and avoiding the need to copy data to the replica nodes. For more information about replication with Amazon Aurora, see the online documentation.

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.html
https://aws.amazon.com/rds/features/read-replicas/

References:

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.htmlhttps://aws.amazon.com/rds/features/read-replicas/

How can a solutions architect separate read requests from write requests in an Amazon Aurora Multi-AZ deployment?

Single Choice

Enable read-through caching on the Amazon Aurora database.

Update the application to read from the Multi-AZ standby instance.

Create a read replica and modify the application to use the appropriate endpoint.

Create a second Amazon Aurora database and link it to the primary database as a read replica.

Define Performant Architectures

Correct Answer:

Create a read replica and modify the application to use the appropriate endpoint.

Explanation:

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.html
https://aws.amazon.com/rds/features/read-replicas/

References:

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.htmlhttps://aws.amazon.com/rds/features/read-replicas/

How can a solutions architect maintain desired performance across all instances in an EC2 Auto Scaling group?

Single Choice

An application runs on Amazon EC2 instances across multiple Availability Zones. The instances run in an Amazon EC2 Auto Scaling group behind an Application Load Balancer. The application performs best when the CPU utilization of the EC2 instances is at or near 40%.

What should a solutions architect do to maintain the desired performance across all instances in the group?

Use a simple scaling policy to dynamically scale the Auto Scaling group.

Use a target tracking policy to dynamically scale the Auto Scaling group.

Use an AWS Lambda function to update the desired Auto Scaling group capacity.

Use scheduled scaling actions to scale up and scale down the Auto Scaling group.

Define Performant Architectures

What is the most secure way to access an Amazon DynamoDB table without leaving the AWS network?

Single Choice

An application runs on Amazon EC2 instances in private subnets. The application needs to access an Amazon DynamoDB table. What is the MOST secure way to access the table while ensuring that the traffic does not leave the AWS network?

Use a VPC endpoint for DynamoDB.

Use a NAT gateway in a public subnet.

Use a NAT instance in a private subnet.

Use the internet gateway attached to the VPC.

Specify Secure Applications and Architectures

How can the disk space of an Amazon RDS MySQL DB instance be increased without downtime?

Single Choice

An application uses an Amazon RDS MySQL DB instance. The RDS database is becoming low on disk space. A solutions architect wants to increase the disk space without downtime. Which solution meets these requirements with the LEAST amount of effort?

Enable storage auto scaling in RDS.

Increase the RDS database instance size.

Change the RDS database instance storage type to Provisioned IOPS.

Back up the RDS database, increase the storage capacity, restore the database and stop the previous instance.

Define Performant Architectures

How can a solutions architect address performance degradation caused by read-only SQL queries in an Amazon RDS based web application?

Single Choice

An ecommerce company has noticed performance degradation of its Amazon RDS based web application. The performance degradation is attributed to an increase in the number of read-only SQL queries triggered by business analysts. A solutions architect needs to solve the problem with minimal changes to the existing web application.

What should the solutions architect recommend?

Export the data to Amazon DynamoDB and have the business analysts run their queries.

Load the data into Amazon ElastiCache and have the business analysts run their queries.

Create a read replica of the primary database and have the business analysts run their queries.

Copy the data into an Amazon Redshift cluster and have the business analysts run their queries.

Define Performant Architectures

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Amazon (SAA-C03) Exam Questions And Answers page 53

Which Amazon EBS volume type is suitable for an application requiring millisecond latency for small file system operations?

Correct Answer:

References:

Comments

What is the most cost-effective compute instance purchase strategy for a long-term DEV and PROD environment?

Comments

How to enable secure access between EC2 instances in separate VPCs across different AWS accounts?

Comments

How can a solutions architect configure least privilege access to a DynamoDB table from an EC2 instance?

Comments

How can a solutions architect separate read and write requests in an Amazon Aurora Multi-AZ deployment?

Correct Answer:

Explanation:

References:

Comments

How can a solutions architect separate read requests from write requests in an Amazon Aurora Multi-AZ deployment?

Correct Answer:

Explanation:

References:

Comments

How can a solutions architect maintain desired performance across all instances in an EC2 Auto Scaling group?

Correct Answer:

Explanation:

References:

Comments

What is the most secure way to access an Amazon DynamoDB table without leaving the AWS network?

Comments

How can the disk space of an Amazon RDS MySQL DB instance be increased without downtime?

Comments

How can a solutions architect address performance degradation caused by read-only SQL queries in an Amazon RDS based web application?

Comments

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