AWS-Certified-Big-Data-Specialty Free Practice Test

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 city has been collecting data on its public bicycle share program for the past three years. The SPB
dataset currently on Amazon S3. The data contains the following data points:
• Bicycle organization points
• Bicycle destination points
• Mileage between the points
• Number of bicycle slots available at the station (which is variable based on the station location)
• Number of slots available and taken at each station at a given time
The program has received additional funds to increase the number of bicycle stations, available. All data is regularly archived to Amazon Glacier.
The new bicycle station must be located to provide the most riders access to bicycles. How should this task be performed?

1. A. Move the data from Amazon S3 into Amazon EBS-backed volumes and EC2 Hardoop with spot instances to run a Spark job that performs a stochastic gradient descent optimization.
2. B. Use the Amazon Redshift COPY command to move the data from Amazon S3 into RedShift and platform a SQL query that outputs the most popular bicycle stations.
3. C. Persist the data on Amazon S3 and use a transits EMR cluster with spot instances to run a Spark streaming job that will move the data into Amazon Kinesis.
4. D. Keep the data on Amazon S3 and use an Amazon EMR based Hadoop cluster with spot insistences to run a spark job that perform a stochastic gradient descent optimization over EMBFS.

Correct Answer: B

A user is planning to setup infrastructure on AWS for the Christmas sales. The user is planning to use
Auto Scaling based on the schedule for proactive scaling. What advise would you give to the user?

1. A. It is good to schedule now because if the user forgets later on it will not scale up
2. B. The scaling should be setup only one week before Christmas
3. C. Wait till end of November before scheduling the activity
4. D. It is not advisable to use scheduled based scaling

Correct Answer: C

A company needs to monitor the read and write IOPs metrics for their AWS MySQL RDS instances
and send real-time alerts to their operations team. Which AWS services can accomplish this? Choose 2 answers

1. A. Amazon Simple Email Service
2. B. Amazon CloudWatch
3. C. Amazon Simple Queue Service
4. D. Amazon Route 53
5. E. Amazon Simple Notification Service

Correct Answer: BE

Customers have recently been complaining that your web application has randomly stopped responding. During a deep dive of your logs, the team has discovered a major bug in your Java web application. This bug is causing a memory leak that eventually causes the application to crash.
Your web application runs on Amazon EC2 and was built with AWS CloudFormation.
Which techniques should you see to help detect theses problems faster, as well as help eliminate the server’s unresponsiveness? Choose 2 answers

1. A. Update your AWS CloudFormation configuration and enable a CustomResource that uses cfn- signal to detect memory leaks
2. B. Update your CloudWatch metric granularity config for all Amazon EC2 memory metrics to support five-second granularit
3. C. Create a CloudWatch alarm that triggers an Amazon SNS notification to page your team when the application memory becomes too large
4. D. Update your AWS CloudFormation configuration to take advantage of Auto Scaling group
5. E. Configure an Auto Scaling group policy to trigger off your custom CloudWatch metrics
6. F. Create a custom CloudWatch metric that you push your JVM memory usage to create a CloudWatch alarm that triggers an Amazon SNS notification to page your team when the application memory usage becomes too large
7. G. Update your AWS CloudFormation configuration to take advantage of CloudWatch metrics Agen
8. H. Configure the CloudWatch Metrics Agent to monitor memory usage and trigger an Amazon SNS alarm

Correct Answer: CD