BDS-C00 Free Practice Test

A media advertising company handles a large number of real-time messages sourced from over 200
websites in real time. Processing latency must be kept low. Based on calculations, a 60- shared Amazon Kinesis stream is more then sufficient to handle the maximum data throughput, even with traffic spikes. The company also uses an Amazon Kinesis Client Library (KCL) application running on Amazon Elastic Compute Cloud (EC2) managed by an Auto Scaling group. Amazon CloudWatch indicates an average of 25% CPU and a modest level of network traffic across all running servers.
The company reports a 150% to 200% increase in latency of processing messages from Amazon kinesis during peak times. There are NO reports of delay from the sites publishing to Amazon Kinesis. What is the appropriate solution to address the latency?

1. A. Increase the number of shared in the Amazon Kinesis stream to 80 for greater concurrency
2. B. Increate the size of the Amazon EC2 instances to increase network throughput
3. C. Increase the minimum number of instances in the Auto Scaling group
4. D. Increase Amazon DynamoDB throughput on the checkpointing table

Correct Answer: A

You have an ASP.NET web application running in Amazon Elastic BeanStalk. Your next version of the
application requires a third-party Windows installer package to be installed on the instance on first boot and before the application launches.
Which options are possible? Choose 2 answer

1. A. In the application’s Global.asax file, run msiexec.exe to install the package using Process.Start() in the Application_Start event handler
2. B. In the source bundle’s .ebextensions folder, create a file with a .config extensio
3. C. In the file, under the “packages” section and “msi” package manager, include the package’s URL
4. D. Launch a new Amazon EC2 instance from the AMI used by the environmen
5. E. Log into the instance, install the package and run syspre
6. F. Create a new AM
7. G. Configure the environment to use the new AMI
8. H. In the environment’s configuration, edit the instances configuration and add the package’s URL to the “Packages” section
9. I. In the source bundle’s .ebextensions folder, create a “Packages” folde
10. J. Place the package in the folder

Correct Answer: BC

A company needs to deploy services to an AWS region which they not previously used. The company currently has an AWS identity and Access Management (IAM) role for their Amazon EC2 instances, which permits the instance to have access to Amazon DynamoDB. The company wants their EC2 instances in the new region to have the same privileges. How should the company achieve this?

1. A. Create a new IAM role and associated policies within the new region
2. B. Assign the existing IAM role to the Amazon EC2 instances in the new region
3. C. Copy the IAM role and associated policies to the new region and attach it to the instances
4. D. Create the Amazon Machine Image of the instance and copy it to the desired region using the AMI Copy feature

Correct Answer: B

You have an application running on an Amazon Elastic Compute Cloud instance, that uploads 5 GB
video objects to Amazon Simple Storage Service (S3). Video uploads are taking longer than expected, resulting in poor application performance. Which method will help improve performance of your application?

1. A. Enable enhanced networking
2. B. Use Amazon S3 multipart upload
3. C. Leveraging Amazon CloudFront, use the HTTP POST method to reduce latency.
4. D. Use Amazon Elastic Block Store Provisioned IOPs and use an Amazon EBS-optimized instance

Correct Answer: B

A company uses Amazon Redshift for its enterprise data warehouse. A new op-premises PostgreSQL
OLTP DB must be integrated into the data warehouse. Each table in the PostgreSQL DB has an indexed last_modified timestamp column. The data warehouse has a staging layer to load source data into the data warehouse environment for further processing.
The data log between the source PostgreSQL DB and the Amazon Redshift staging layer should NOT exceed four hours.
What is the most efficient technique to meet these requirements?

1. A. Create a DBLINK on the source DB to connect to Amazon Redshif
2. B. Use a PostgreSQL trigger on the source table to capture the new insert/update/delete event and execute the event on the Amazon Redshift staging table.
3. C. Use a PostgreSQL trigger on the source table to capture the new insert/update/delete event and write it to Amazon Kinesis Stream
4. D. Use a KCL application to execute the event on the Amazon Redshift staging table.
5. E. Extract the incremental changes periodically using a SQL quer
6. F. Upload the changes to multiple Amazon Simple Storage Service (S3) objects and run the COPY command to load the Amazon Redshift staging table.
7. G. Extract the incremental changes periodically using a SQL quer
8. H. Upload the changes to a single Amazon Simple Storage Service (S3) object run the COPY command to load to the Amazon Redshift staging layer.

Correct Answer: C