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

You want to securely distribute credentials for your Amazon RDS instance to your fleet of web server
instances. The credentials are stored in a file that is controlled by a configuration management system.
How do you securely deploy the credentials in an automated manner across the fleet of web server instances, which can number in the hundreds, while retaining the ability to roll back if needed?

1. A. Store your credential files in an Amazon S3 bucke
2. B. Use Amazon S3 server-side encryption on the credential file
3. C. Have a scheduled job that pulls down the credential files into the instances every 10 minutes
4. D. Store the credential files in your version-controlled repository with the rest of your cod
5. E. Have a post-commit action in version control that kicks off a job in your continuous integration system which securely copies the new credentials files to all web server instances
6. F. Insert credential files into user data and use an instance lifecycle policy to periodically refresh the files from the user data
7. G. Keep credential files as a binary blob in an Amazon RDS MySQL DB instance, and have a script on each Amazon EC2 instance that pulls the files down from the RDS instance
8. H. Store the credential files in your version-controlled repository with the rest of your cod
9. I. Use a parallel file copy program to send the credential files from your local machine to the Amazon EC2 instances

Correct Answer: D

When attached to an Amazon VPC which two components provide connectivity with external
networks? Choose 2 answers

1. A. Elastic IPS (EIP)
2. B. NAT Gateway (NAT)
3. C. Internet Gateway {IGW)
4. D. Virtual Private Gateway (VGW)

Correct Answer: CD

A user has launched an EC2 instance and deployed a production application in it. The user wants to prohibit any mistakes from the production team to avoid accidental termination. How can the user achieve this?

1. A. The user can the set DisableApiTermination attribute to avoid accidental termination
2. B. It is not possible to avoid accidental termination
3. C. The user can set the Deletion termination flag to avoid accidental termination
4. D. The user can set the InstanceInitiatedShutdownBehavior flag to avoid accidental termination

Correct Answer: A

There are thousands of text files on Amazon S3. The total size of the files is 1 PB. The files contain
retail order information for the past 2 years. A data engineer needs to run multiple interactive queries to manipulate the data. The data Engineer has AWS access to spin up an Amazon EMR cluster. The data Engineer needs to use an application on the cluster to process this data and return the results in interactive time frame. Which application on the cluster should be the data engineer use?

1. A. Oozie
2. B. Apache Pig with Tachyon
3. C. Apache Hive
4. D. Presto

Correct Answer: D

You are configuring your company’s application to use Auto Scaling and need to move user state
information. Which of the following AWS services provides a shared data store with durability and low latency?

1. A. Amazon Simple Storage Service
2. B. Amazon DynamoDB
3. C. Amazon EC2 instance storage
4. D. AWS ElasticCache Memcached

Correct Answer: A