Amazon BDS-C00 Exam Practice Test Instant Access

Question 1

A user is planning to use the AWS RDS with MySQL. Which of the below mentioned services the user is not going to pay?

AData transfer

BRDS CloudWatch metrics

CData storage

DI/O requests per month

Answer : B

Question 2

Typically, you want your application to check whether a request generated an error before you spend any time processing results. The easiest way to find out if an error occurred is to look for an __________ node in the response from the Amazon RDS API.

AIncorrect

BError

CFALSE

Answer : B

Question 3

You run a web application with the following components Elastic Load Balancer (ELB), 3 Web/Application servers, 1 MySQL RDS database with read replicas, and Amazon Simple Storage Service (Amazon S3) for static content. Average response time for users is increasing slowly. What three CloudWatch RDS metrics will allow you to identify if the database is the bottleneck? Choose 3 answers

AThe number of outstanding IOs waiting to access the disk

BThe amount of write latency

CThe amount of disk space occupied by binary logs on the master.

DThe amount of time a Read Replica DB Instance lags behind the source DB Instance

EThe average number of disk I/O operations per second.

Answer : A, B, D

Question 4

The Marketing Director in your company asked you to create a mobile app that lets users post sightings of good deeds known as random acts of kindness in 80-character summaries. You decided to write the application in JavaScript so that it would run on the broadest range of phones, browsers, and tablets. Your application should provide access to Amazon DynamoDB to store the good deed summaries. Initial testing of a prototype shows that there aren't large spikes in usage. Which option provides the most cost-effective and scalable architecture for this application?

AProvide the JavaScript client with temporary credentials from the Security Token Service using a Token Vending Machine

BRegister the application with a Web Identity Provider like Amazon, Google, or Facebook, create an IAM role for that provider, and set up permissions for the IAM role to allow S3 gets and DynamoDB puts. You serve your mobile application out of an S3 bucket enabled as a web site. Your client updates DynamoDB.

CProvide the JavaScript client with temporary credentials from the Security Token Service using a Token Vending Machine (TVM) to provide signed credentials mapped to an IAM user allowing DynamoDB puts. You serve your mobile application out of Apache EC2 instances that are load-balanced and autoscaled. Your EC2 instances are configured with an IAM role that allows DynamoDB puts. Your server updates DynamoDB.

DRegister the JavaScript application with a Web Identity Provider like Amazon, Google, or Facebook, create an IAM role for that provider, and set up permissions for the IAM role to allow DynamoDB puts. You serve your mobile application out of Apache EC2 instances that are load-balanced and autoscaled. Your EC2 instances are configured with an IAM role that allows DynamoDB puts. Your server updates DynamoDB.

Answer : B

Question 5

You are building a mobile app for consumers to post cat pictures online. You will be storing the images in AWS S3. You want to run the system very cheaply and simply. Which one of these options allows you to build a photo sharing application without needing to worry about scaling expensive uploads processes, authentication/authorization and so forth?

ABuild the application out using AWS Cognito and web identity federation to allow users to log in using Facebook or Google Accounts. Once they are logged in, the secret token passed to that user is used to directly access resources on AWS, like AWS S3. (Amazon Cognito is a superset of the functionality provided by web identity federation. Referlink)

BUse JWT or SAML compliant systems to build authorization policies. Users log in with a username and password, and are given a token they can use indefinitely to make calls against the photo infrastructure.

CUse AWS API Gateway with a constantly rotating API Key to allow access from the client-side. Construct a custom build of the SDK and include S3 access in it.

DCreate an AWS oAuth Service Domain ad grant public signup and access to the domain. During setup, add at least one major social media site as a trusted Identity Provider for users

Answer : A

Question 6

Amazon RDS creates an SSL certificate and installs the certificate on the DB Instance when Amazon RDS provisions the instance. These certificates are signed by a certificate authority. The _____ is stored athttps://rds.amazonaws.com/doc/rds-ssl-ca-cert.pem.

Aprivate key

Bforeign key

Cpublic key

Dprotected key

Answer : A

Question 7

What happens to the I/O operations while you take a database snapshot?

AI/O operations to the database are suspended for an hour while the backup is in progress.

BI/O operations to the database are sent to a Replica (if available) for a few minutes while the backup is in progress.

CI/O operations will be functioning normally

DI/O operations to the database are suspended for a few minutes while the backup is in progress.

Answer : D

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