Amazon BDS-C00 Exam Practice Test Instant Access

Question 1

A real-time bidding company is rebuilding their monolithic application and is focusing on serving real-time data. A large number of reads and writes are generated from thousands of concurrent users who follow items and bid on the company's sale offers.

The company is experiencing high latency during special event spikes, with millions of concurrent users.

The company needs to analyze and aggregate a part of the data in near real time to feed an internal dashboard.

What is the BEST approach for serving and analyzing data, considering the constraint of the row latency on the highly demanded data?

AUse Amazon Aurora with Multi Availability Zone and read replicas. Use Amazon ElastiCache in front of the read replicas to serve read-only content quickly. Use the same database as datasource for the dashboard.

BUse Amazon DynamoDB to store real-time data with Amazon DynamoDB. Accelerator to serve content quickly. use Amazon DynamoDB Streams to replay all changes to the table, process and stream to Amazon Elasti search Service with AWS Lambda.

CUse Amazon RDS with Multi Availability Zone. Provisioned IOPS EBS volume for storage. Enable up to five read replicas to serve read-only content quickly. Use Amazon EMR with Sqoop to import Amazon RDS data into HDFS for analysis.

DUse Amazon Redshift with a DC2 node type and a multi-mode cluster. Create an Amazon EC2 instance with pgpoo1 installed. Create an Amazon ElastiCache cluster and route read requests through pgpoo1, and use Amazon Redshift for analysis.

Answer : B

1.https://rockset.com/blog/live-dashboards-dynamodb-streams-lambda-elasticache/ 2.https://aws.amazon.com/blogs/compute/indexing-amazon-dynamodb-content-with-amazon-elasticsearch-service-using-aws-lambda/ 3. https://aws.amazon.com/blogs/startups/combining-dynamodb-and-amazon-elasticsearch-with-lambda/ 4.https://d1.awsstatic.com/whitepapers/Big_Data_Analytics_Options_on_AWS.pdf?did=wp_card&trk=wp_card

Question 2

Which two AWS services provide out-of-the-box user configurable automatic backup-as-a- service and backup rotation options? Choose 2 answers

AAmazon S3

BAmazon RDS

CAmazon EBS

DAmazon Redshift

Answer : B, D

Question 3

An online photo album app has a key design feature to support multiple screens (e.g. desktop, mobile phone, and tablet) with high quality displays. Multiple versions of the image must be saved in different resolutions and layouts.

The image processing Java program takes an average of five seconds per upload, depending on the image size and format. Each image upload captures the following image metadata: user, album, photo label, upload timestamp

The app should support the following requirements:

* Hundreds of user image uploads per second

* Maximum image metadata size of 10 MB

* Maximum image metadata size of 1 KB

*Image displayed in optimized resolution in all supported screens no later than one minute after image upload

Which strategy should be used to meet these requirements?

AWrite images and metadata to Amazon Kinesis, Use a Kinesis Client Library (KCL) application to run the image processing and save the image output to Amazon S3 and metadata to the app repository DB

BWrite image and metadata RDS with BLOB data type. Use AWS Data Pipeline to run the image processing and save the image output to Amazon S3 and metadata to the app repository DB

CUpload image with metadata to Amazon S3 use Lambda function to run the image processing and save the image output to Amazon S3 and metadata to the app repository DB

DWrite image and metadata to Amazon kinesis. Use Amazon Elastic MapReduce (EMR) with Spark Streaming to run image processing and save image output to Amazon

Answer : D

Question 4

Does AWS Direct Connect allow you access to all Availabilities Zones within a Region?

ADepends on the type of connection

BNo

CYes

DOnly when there's just one availability zone in a region. If there are more than one, only one availability zone can be accessed directly.

Answer : A

Question 5

An organization is designing an application architecture. The application will have over 100 TB of data and will support transactions that arrive at rates from hundreds per second to tens of thousands per second, depending on the day of the week and time of day. All transaction data must be durably and reliably stored. Certain read operations must be performed with strong consistency.

Which solutions meets these requirements?

AUse Amazon DynamoDB as the data store and use strong consistent reads when necessary

BUse an Amazon Relational Database Service (RDS) instance sized to meet the maximum transaction rate and with the High Availability option enabled.

CDeploy a NoSQL data store on top of an Amazon Elastic MapReduce (EMR) cluster, and select the
HDFS High Durability option.

DUse Amazon Redshift with synchronous replication to Amazon Simple Storage Service (S3) and row- level locking for strong consistency.

Answer : A

Question 6

Which of the following instance types are available as Amazon EBS backend only?

AGeneral purpose T2

BGeneral purpose M3

CCompute-optimized C4

DCompute-optimized C3

EStorage-optimized 12

Answer : A, C

Question 7

A data engineer is running a DWH on a 25-node Redshift cluster of a SaaS service. The data engineer needs to build a dashboard that will be used by customers. Five big customers represent 80% of usage, and there is a long tail of dozens of smaller customers. The data engineer has selected the dashboarding tool.

How should the data engineer make sure that the larger customer workloads do NOT interfere with the smaller customer workloads?

AApply query filters based on customer-id that can NOT be changed by the user and apply distribution keys on customer id

BPlace the largest customers into a single user group with a dedicated query queue and place the rest of the customer into a different query queue

CPush aggregations into an RDS for Aurora instance. Connect the dashboard application to Aurora rather than Redshift for faster queries

DRoute the largest customers to a dedicated Redshift cluster, Raise the concurrency of the multi-tenant Redshift cluster to accommodate the remaining customers

Answer : B

https://docs.aws.amazon.com/redshift/latest/dg/c_workload_mngmt_classification.html

Amazon AWS Certified Big Data - Specialty BDS-C00 Exam Practice Test