BDS-C00 Exam - AWS Certified Big Data -Speciality

NEW QUESTION 1
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

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

Answer: CD

NEW QUESTION 2
An administrator needs to design a distribution strategy for a star schema in a Redshift cluster. The
administrator needs to determine the optimal distribution style for the tables in the Redshift schema. In which three circumstances would choosing Key-based distribution be most appropriate? (Select three)

• A. When the administrator needs to optimize a large, slowly changing dimension table
• B. When the administrator needs to reduce cross-node traffic
• C. When the administrator needs to optimize the fact table for parity with the number of slices
• D. When the administrator needs to balance data distribution and collocation of data
• E. When the administrator needs to take advantage of data locality on a local node of joins and aggregates

Answer: ADE

NEW QUESTION 3
A customer has a machine learning workflow that consist of multiple quick cycles of reads-writes-
reads on Amazon S3. The customer needs to run the workflow on EMR but is concerned that the reads in subsequent cycles will miss new data critical to the machine learning from the prior cycles.
How should the customer accomplish this?

• A. Turn on EMRFS consistent view when configuring the EMR cluster
• B. Use AWS Data Pipeline to orchestrate the data processing cycles
• C. Set Hadoop.data.consistency = true in the core-site.xml file
• D. Set Hadoop.s3.consistency = true in the core-site.xml file

Answer: B

NEW QUESTION 4
A user has setup an RDS DB with Oracle. The user wants to get notifications when someone modifies
the security group of that DB. How can the user configure that?

• A. It is not possible to get the notifications on a change in the security group
• B. Configure SNS to monitor security group changes
• C. Configure event notification on the DB security group
• D. Configure the CloudWatch alarm on the DB for a change in the security group

Answer: C

NEW QUESTION 5
When will you incur costs with an Elastic IP address (EIP)?

• A. When an EIP is allocated.
• B. When it is allocated and associated with a running instance.
• C. When it is allocated and associated with a stopped instance.
• D. Costs are incurred regardless of whether the EIP is associated with a running instance.

Answer: C

NEW QUESTION 6
You are deploying an application to track GPS coordinates of delivery in the United States.
Coordinates are transmitted from each delivery truck once every three seconds. You need to design an architecture that will enable realtime processing of these coordinates from multiple consumers. Which service should you use to implement data ingestion?

• A. Amazon Kinesis
• B. AWS Data Pipeline
• C. Amazon AppStream
• D. Amazon Simple Queue Service

Answer: A

NEW QUESTION 7
A clinical trial will rely on medical sensors to remotely assess patient health. Each physician who
participates in the trial requires visual reports each morning. The reports are built from aggregations of all the sensor data taken each minute.
What is the most cost-effective solution for creating this visualization each day?

• A. Use Kinesis Aggregators Library to generate reports for reviewing the patient sensor data and generate a QuickSight visualization on the new data each morning for the physician to review
• B. Use a Transient EMR cluster that shuts down after use to aggregate the patient sensor data each night and generate a QuickSight visualization on the new data each morning for the physician to review
• C. Use Spark streaming on EMR to aggregate the sensor data coming in every 15 minutes and generate a QuickSight visualization on the new data each morning for the physician to review
• D. Use an EMR cluster to aggregate the patient sensor data each right and provide Zeppelin notebooks that look at the new data residing on the cluster each morning

Answer: AD

NEW QUESTION 8
Your Devops team is responsible for a multi-tier, Windows-based web application consisting of web servers, Amazon RDS database instances, and a load balancer behind Amazon Route53. You have been asked by your manager to build a cost-effective rolling deployment solution for this web application.
What method should you use?

• A. Re-deploy your application on an AWS OpsWorks stac
• B. Use the AWS OpsWorks clone stack feature to allow updates between duplicate stacks
• C. Re-deploy your application on Elastic BeanStalk and take advantage of Elastic BeanStalk rolling updates
• D. Re-deploy your application using an AWS CloudFormation template, launch a new AWS CloudFormation stack during each deployment, and then tear down the old stack
• E. Re-deploy your application using an AWS CloudFormation templat
• F. Use AWS CloudFormation rolling deployment policies, create a new policy for your AWS CloudFormation stack, and initiate an update stack operation to deploy new code

Answer: D

NEW QUESTION 9
A photo sharing service stores pictures in Amazon Simple Storage Service (S3) and allows application
signin using an Open ID Connect compatible identity provider. Which AWS Security Token approach to temporary access should you use for the Amazon S3 operations?

• A. SAML-based identity Federation
• B. Cross-Account Access
• C. AWS identity and Access Management roles
• D. Web identity Federation

Answer: A

NEW QUESTION 10
An Amazon Redshift Database is encrypted using KMS. A data engineer needs to use the AWS CLI to
create a KMS encrypted snapshot of the database in another AWS region.
Which three steps should the data engineer take to accomplish this task? (Select Three.)

• A. Create a new KMS key in the destination region
• B. Copy the existing KMS key to the destination region
• C. Use CreateSnapshotCopyGrant to allow Amazon Redshift to use the KMS key created in the destination region
• D. Use CreateSnapshotCopyGrant to allow Amazon Redshift to use the KMS key from the source region
• E. In the source, enable cross-region replication and specify the name of the copy grant created
• F. In the destination region, enable cross-region replication and specify the name of the copy grant created

Answer: BDF

NEW QUESTION 11
An Administrator needs to design the event log storage architecture for events from mobile devices.
The event data will be processed by an Amazon EMR cluster daily for aggregated reporting and analytics before being archived.
How should the administrator recommend storing the log data?

• A. Create an Amazon S3 bucket and write log data into folders by device Execute the EMR job on the device folders
• B. Create an Amazon DynamoDB table partitioned on the device and sorted on data, write log data to the tabl
• C. Execute the EMR job on the Amazon DynamoDB table
• D. Create an Amazon S3 bucket and write data into folders by da
• E. Execute the EMR job on the daily folder
• F. Create an Amazon DynamoDB table partitioned on EventID, write log data to tabl
• G. Execute the EMR job on the table

Answer: C

NEW QUESTION 12
A customer has an Amazon S3 bucket. Objects are uploaded simultaneously by a cluster of servers from multiple streams of data. The customer maintains a catalog of objects uploaded in Amazon S3 using an Amazon DynamoDB table. This catalog has the following fields StreamName, TimeStamp, and ServerName, TimeStamp, and ServerName, from which ObjectName can be obtained.
The customer needs to define the catalog to support querying for a given stream or server within a defined time range.
Which DynamoDB table scheme is most efficient to support these queries?

• A. Define a Primary Key with ServerName as Partition Key and TimeStamp as Sort Ke
• B. Don NOT define a Secondary Index or Global Secondary Index.
• C. Define a Primary Key with StreamName as Partition Key and TimeStamp followed by ServerName as Sort Ke
• D. Define a Global Secondary Index with ServerName as Partition Key and TimeStamp followed by StreamName.
• E. Define a Primary Key with ServerName as Partition Ke
• F. Define a Local Secondary Index with StreamName as Partition Ke
• G. Define a Global Secondary Index with TimeStamp as Partition Key.
• H. Define a Primary Key with ServerName as Partition Ke
• I. Define a Local Secondary Index with TimeStamp as Partition Ke
• J. Define a Global Secondary Index with StreamName as Partition key and TimeStamp as Sort Key.

Answer: A

NEW QUESTION 13
A company’s social media manager requests more staff on the weekends to handle an increase in
customer contacts from a particular region. The company needs a report to visualize the trends on weekends over the past 6 months using QuickSight.
How should the data be represented?

• A. A line graph plotting customer contacts v
• B. time, with a line for each region
• C. A pie chart per region plotting customer contacts per day of week
• D. A map of the regions with a heatmap overlay to show the volume of customer contacts
• E. A bar graph plotting region vs volume of social media contacts

Answer: A

NEW QUESTION 14
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 Active Directory. What combination of the following will give developers access to the AWS console? 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

Answer: AD

NEW QUESTION 15
Which data store should the organization choose?

• A. Amazon Relational Database Service (RDS)
• B. Amazon Redshift
• C. Amazon DynamoDB
• D. Amazon Elasticsearch

Answer: C

NEW QUESTION 16
When using the following AWS services, which should be implemented in multiple Availability Zones
for high availability solutions? Choose 2 answers

• A. Amazon Simple Storage Service
• B. Amazon Elastic Load Balancing
• C. Amazon Elastic Compute Cloud
• D. Amazon Simple Notification Service
• E. Amazon DynamoDB

Answer: BC

NEW QUESTION 17
You have identified network throughput as a bottleneck on your m1.small EC2 instance when uploading data Into Amazon S3 In the same region. How do you remedy this situation?

• A. Add an additional ENI
• B. Change to a larger Instance
• C. Use DirectConnect between EC2 and S3
• D. Use EBS PIOPS on the local volume

Answer: B

NEW QUESTION 18
Which of the following requires a custom cloudwatch metric to monitor?

• A. Memory utilization of an EC2 instance
• B. CPU utilization of an EC2 instance
• C. Disk usage activity of an EC2 instance
• D. Data transfer of an EC2 instance

Answer: A

NEW QUESTION 19
A web-hosting company is building a web analytics tools to capture clickstream data from all of the
websites hosted within its platform and to provide near-real-time business intelligence. This entire system is built on AWS services. The web-hosting company is interested in using Amazon kinesis to collect this data and perform sliding window analytics. What is the most reliable and fault-tolerant technique to get each website to send data to Amazon Kinesis with every click?

• A. After receiving a request each web server sends it to Amazon kinesis using the Amazon kinesis PutRecord APL Use the SessionID as a parturition key and set up a loop to retry until a successresponse is received
• B. After receiving a request each web server sends it to Amazon kinesis using the Amazon Kinesis Producer Library addRecord method
• C. Each web server bluffers the request until the count reaches 500 and sends them to Amazon kinesis using the Amazon kinesis PutRecord API call
• D. After receiving a request each web server sends it to Amazon Kinesis using the Amazon kinesis PutRecord AP
• E. Use the exponential back off algorithm for retries until a successful response is received

Answer: A

NEW QUESTION 20
A customer wants to track access to their Amazon Simple Storage Service (S3) buckets and also use
this information for their internal security and access audits. Which of the following will meet the Customer requirement?

• A. Enable AWS CloudTrail to audit all Amazon S3 bucket access.
• B. Enable server access logging for all required Amazon S3 bucket
• C. Enable the Requester Pays option to track access via AWS Billing
• D. Enable Amazon S3 event notifications for Put and Post.

Answer: B

NEW QUESTION 21
A us-based company is expanding their web presence into Europe. The company wants to extend their AWS infrastructure from Northern Virginia (us-east-1) into the Dublin (eu-west-1) region. Which of the following options would enable an equivalent experience for users on both continents?

• A. Use a public-facing load balancer per region to load-balancer web traffic, and enable HTTP health checks
• B. Use a public-facing load balancer per region to load balancer web traffic, and enable sticky sessions
• C. Use Amazon Route S3, and apply a geolocation routing policy to distribution traffic across both regions
• D. Use Amazon Route S3, and apply a weighted routing policy to distribute traffic across both regions

Answer: C

NEW QUESTION 22
A user has created an ELB with Auto Scaling. Which of the below mentioned offerings from ELB helps
the user to stop sending new requests traffic from the load balancer to the EC2 instance when the instance is being deregistered while continuing in-flight requests?

• A. ELB sticky session
• B. ELB deregistration check
• C. ELB connection draining
• D. ELB auto registration Off

Answer: C

NEW QUESTION 23
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?

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

Answer: B

NEW QUESTION 24
A Redshift data warehouse has different user teams that need to query the same table with very
different query types. These user teams are experiencing poor performance. Which action improves performance for the user teams in this situation?

• A. Create custom table views
• B. Add interleaved sort keys per team
• C. Maintain team-specific copies of the table
• D. Add support for workload management queue hopping

Answer: B

NEW QUESTION 25
You run a small online consignment marketplace. Interested sellers complete an online application in
order to allow them to sell their products on your website. Once approved, they can their product using a custom interface. From that point, you manage the shopping cart process so that when a buyer decides to buy a product, you handle the billing and coordination the shipping. Part of this process requires sending emails to the buyer and the seller at different stages. Your system has been running on AWS for a few months. Occasionally, products are shipped before payment has cleared and emails are sent out of order. Furthermore, sometimes credit cards are being charged twice.
How can you resolve these problems?

• A. Use the Amazon Simple Queue Service (SQS), and use a different set of workers for each task
• B. Use the Amazon Simple Workflow Service (SWF), and use a different set of workers for each task.
• C. Use the Simple Email Service (SES) to control the correct order of email delivery
• D. Use the AWS Data Pipeline service to control the process flow of the various tasks
• E. Use the Amazon Simple Queue Service (SQS), and use a single set of workers for each task

Answer: E

NEW QUESTION 26
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