SOA-C02 Free Practice Test

- (Exam Topic 1)
A company wants to collect data from an application to use for analytics. For the first 90 days, the data will be infrequently accessed but must remain highly available. During this time, the company's analytics team requires access to the data in milliseconds. However, after 90 days, the company must retain the data for the long term at a lower cost. The retrieval time after 90 days must be less than 5 hours.
Which solution will meet these requirements MOST cost-effectively?

1. A. Store the data in S3 Standard-Infrequent Access (S3 Standard-IA) for the first 90 day
2. B. Set up an S3 Lifecycle rule to move the data to S3 Glacier Flexible Retrieval after 90 days.
3. C. Store the data in S3 One Zone-Infrequent Access (S3 One Zone-IA) for the first 90 day
4. D. Set up an S3 Lifecycle rule to move the data to S3 Glacier Deep Archive after 90 days.
5. E. Store the data in S3 Standard for the first 90 day
6. F. Set up an S3 Lifecycle rule to move the data to S3 Glacier Flexible Retrieval after 90 days.
7. G. Store the data in S3 Standard for the first 90 day
8. H. Set up an S3 Lifecycle rule to move the data to S3 Glacier Deep Archive after 90 days.

Correct Answer: A
Glacier Deep Archive retrieval time more than 5 hours (it's 12 hours), so B&D out. S3 Standard IA is cheaper than S3 Standard. https://aws.amazon.com/tw/s3/pricing/

- (Exam Topic 1)
An application team uses an Amazon Aurora MySQL DB cluster with one Aurora Replica. The application team notices that the application read performance degrades when user connections exceed 200. The number of user connections is typically consistent around 180. with occasional sudden increases above 200 connections. The application team wants the application to automatically scale as user demand increases or decreases.
Which solution will meet these requirements?

1. A. Migrate to a new Aurora multi-master DB cluste
2. B. Modify the application database connection string.
3. C. Modify the DB cluster by changing to serverless mode whenever user connections exceed 200.
4. D. Create an auto scaling policy with a target metric of 195 DatabaseConnections
5. E. Modify the DB cluster by increasing the Aurora Replica instance size.

Correct Answer: C

- (Exam Topic 1)
A SysOps administrator is responsible for a legacy. CPU-heavy application The application can only be scaled vertically Currently, the application is deployed on a single t2 large Amazon EC2 instance The system is showing 90% CPU usage and significant performance latency after a few minutes
What change should be made to alleviate the performance problem?

1. A. Change the Amazon EBS volume to Provisioned lOPs
2. B. Upgrade to a compute-optimized instance
3. C. Add additional 12 large instances to the application
4. D. Purchase Reserved Instances

Correct Answer: B

- (Exam Topic 1)
A company's web application is available through an Amazon CloudFront distribution and directly through an internet-facing Application Load Balancer (ALB) A SysOps administrator must make the application accessible only through the CloudFront distribution and not directly through the ALB. The SysOps administrator must make this change without changing the application code
Which solution will meet these requirements?

1. A. Modify the ALB type to internal Set the distribution's origin to the internal ALB domain name
2. B. Create a Lambda@Edge function Configure the function to compare a custom header value in the request with a stored password and to forward the request to the origin in case of a match Associate the function with the distribution.
3. C. Replace the ALB with a new internal ALB Set the distribution's origin to the internal ALB domain name Add a custom HTTP header to the origin settings for the distribution In the ALB listener add a rule to forward requests that contain the matching custom header and the header's value Add a default rule to return a fixed response code of 403.
4. D. Add a custom HTTP header to the origin settings for the distribution in the ALB listener add a rule to forward requests that contain the matching custom header and the header's value Add a default rule to return a fixed response code of 403.

Correct Answer: D
To make the application accessible only through the CloudFront distribution and not directly through the Application Load Balancer (ALB), you can add a custom HTTP header to the origin settings for the CloudFront distribution. You can then create a rule in the ALB listener to forward requests that contain the matching custom header and its value to the origin. You can also add a default rule to the ALB listener to return a fixed response code of 403 for requests that do not contain the matching custom header. This will allow you to redirect all requests to the CloudFront distribution and block direct access to the application through the ALB.
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/restrict-access-to-load-balancer.html

- (Exam Topic 1)
A gaming application is deployed on four Amazon EC2 instances in a default VPC. The SysOps administrator has noticed consistently high latency in responses as data is transferred among the four instances. There is no way for the administrator to alter the application code.
The MOST effective way to reduce latency is to relaunch the EC2 instances in:

1. A. a dedicated VPC.
2. B. a single subnet inside the VPC.
3. C. a placement group.
4. D. a single Availability Zone.

Correct Answer: C