BDS-C00 Online Practice Questions and Answers

An organization uses a custom map reduce application to build monthly reports based on many small data files in an Amazon S3 bucket. The data is submitted from various business units on a frequent but unpredictable schedule. As the dataset continues to grow, it becomes increasingly difficult to process all of the data in one day. The organization has scaled up its Amazon EMR cluster, but other optimizations could improve performance.

The organization needs to improve performance with minimal changes to existing processes and applications.

What action should the organization take?

A. Use Amazon S3 Event Notifications and AWS Lambda to create a quick search file index in DynamoDB.

B. Add Spark to the Amazon EMR cluster and utilize Resilient Distributed Datasets in-memory.

C. Use Amazon S3 Event Notifications and AWS Lambda to index each file into an Amazon Elasticsearch Service cluster.

D. Schedule a daily AWS Data Pipeline process that aggregates content into larger files using S3DistCp.

E. Have business units submit data via Amazon Kinesis Firehose to aggregate data hourly into Amazon S3.

A company is centralizing a large number of unencrypted small files from multiple Amazon S3 buckets. The company needs to verify that the files contain the same data after centralization.

Which method meets the requirements?

A. Compare the S3 Etags from the source and destination objects.

B. Call the S3 CompareObjects API for the source and destination objects.

C. Place a HEAD request against the source and destination objects comparing SIG v4 headers.

D. Compare the size of the source and destination objects.

A company with a support organization needs support engineers to be able to search historic cases to provide fast responses on new issues raised. The company has forwarded all support messages into an Amazon Kinesis Stream. This meets a company objective of using only managed services to reduce operational overhead.

The company needs an appropriate architecture that allows support engineers to search on historic cases and find similar issues and their associated responses.

Which AWS Lambda action is most appropriate?

A. Ingest and index the content into an Amazon Elasticsearch domain.

B. Stem and tokenize the input and store the results into Amazon ElastiCache.

C. Write data as JSON into Amazon DynamoDB with primary and secondary indexes.

D. Aggregate feedback in Amazon S3 using a columnar format with partitioning.

You have a large number of web servers in an Auto Scaling group behind a load balancer. On an hourly basis, you want to filter and process the logs to collect data on unique visitors, and then put that data in a durable data store in order to run reports. Web servers in the Auto Scaling group are constantly launching and terminating based on your scaling policies, but you do not want to lose any of the log data from these servers during a stop/termination initiated by a user or by Auto Scaling.

What two approaches will meet these requirements?

Choose 2 answers

A. Install an Amazon CloudWatch Logs Agent on every web server during the bootstrap process. Create a CloudWatch log group and define metric Filters to create custom metrics that track unique visitors from the streaming web server logs. Create a scheduled task on an Amazon EC2 instance that runs every hour to generate a new report based on the CloudWatch custom metrics

B. On the web servers, create a scheduled task that executes a script to rotate and transmit the logs to Amazon Glacier. Ensure that the operating system shutdown procedure triggers a logs transmission when the Amazon EC2 instance is stopped/terminated. Use Amazon Data pipeline to process data in Amazon Glacier and run reports every hour

C. On the web servers, create a scheduled task that executes a script to rotate and transmit the logs to an Amazon S3 bucket. Ensure that the operating system shutdown process triggers a logs transmission when the Amazon EC2 instance is stopped/terminated. Use AWS Data Pipeline to move log data from the Amazon S3 bucket to Amazon Redshift in order to process and run reports every hour

D. Install an AWS Data Pipeline Logs Agent on every web server during the bootstrap process. Create a log group object in AWS Data Pipeline, and define Metric filters to move processed log data directly from the web servers to Amazon Redshift and runs reports every hour

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?

A. Store your credential files in an Amazon S3 bucket. Use Amazon S3 server-side encryption on the credential files. Have a scheduled job that pulls down the credential files into the instances every 10 minutes

B. Store the credential files in your version-controlled repository with the rest of your code. 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

C. Insert credential files into user data and use an instance lifecycle policy to periodically refresh the files from the user data

D. 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

E. Store the credential files in your version-controlled repository with the rest of your code. Use a parallel file copy program to send the credential files from your local machine to the Amazon EC2 instances

True or False: When you add a rule to a DB security group, you do not need to specify port number or protocol.

A. Depends on the RDMS used

B. TRUE

C. FALSE

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

A. Amazon Simple Email Service

B. Amazon CloudWatch

C. Amazon Simple Queue Service

D. Amazon Route 53

E. Amazon Simple Notification Service

What is one key difference between an Amazon EBS-backed and an instance-store backed instance?

A. Amazon EBS-backed instances can be stopped and restarted

B. Instance-store backed instances can be stopped and restarted

C. Auto scaling requires using Amazon EBS-backed instances

D. Virtual Private Cloud requires EBS backed instances

A company is preparing to give AWS Management Console access to developers. Company policy mandates identity federation and role based access control. Roles are currently assigned using groups in the corporate

Choose 2 answers

A. AWS Directory Service AD connector

B. AWS Directory Service Simple AD

C. AWS identity and Access Management groups

D. AWS identity and Access Management roles

E. AWS identity and Access Management users

Because of the extensibility limitations of striped storage attached to Windows Server, Amazon RDS does not currently support increasing storage on a _____ DB Instance.

A. SQL Server

B. MySQL

C. Oracle