Question 1

A companys website runs on an Amazon EC2 instance and uses Auto Scaling to scale the environment during peak times. Website users across the world ate experiencing high latency flue lo sialic content on theEC2 instance. even during non-peak hours. When companion of steps mill resolves the latency issue? (Select TWO)

Options :

A : Double the Auto Scaling group’s maximum number of servers.

B : Host the application code on AWS Lambda.

C : Scale vertically by resizing the EC2 instances.

D : Create an Amazon CloudFront distribution to cache the static content

E : Store the applications sialic content in Amazon S3

Answer: D,E

Question 2

A developer is creating an AWS Lambda function that consumes messages from an Amazon Simple Queue Service (Amazon SQS) standard queue. The developer notices that the Lambda function processes some messages multiple times.

How should developer resolve this issue MOST cost-effectively?

Options :

A : Change the Amazon SQS standard queue to an Amazon SQS FIFO queue by using the Amazon SQS message deduplication ID.

B : Set up a dead-letter queue.

C : Set the maximum concurrency limit of the AWS Lambda function to 1.

D : Change the message processing to use Amazon Kinesis Data Streams instead of Amazon SQS.

Answer: A

Question 3

A developer needs to write an AWS CloudFormation template on a local machine and deploy a CloudFormation stack to AWS. What must the developer do to complete these tasks?

Options :

A : Install the AWS CLI. Configure the AWS CLI by using an I AM user name and password.

B : Install the AWS CLI. Configure the AWS CLI by using an SSH key.

C : Install the AWS CLI. Configure the AWS CLI by using an 1AM user access key and secret key.

D : Install an AWS software development kit (SDK). Configure the SDK by using an X.509 certificate.

Answer: C

Question 4

An application uses an Amazon DynamoDB table that is 50 GB in size and provisioned with 10,000 read capacity units (RCUs) per second. The table must be scanned during non-peak hours when normal traffic consumes around 5,000 RCUs. The Developer must scan the whole table in the shortest possible time whilst ensuring the normal workload is not affected.

How would the Developer optimize this scan cost-effectively?

Options :

A : Use the Parallel Scan API operation and limit the rate.

B : Increase read capacity units during the scan operation.

C : Use sequential scans and set the ConsistentRead parameter to false.

D : Use sequential scans and apply a FilterExpression.

Answer: A

Question 5

An organization has encrypted a large quantity of data. To protect their data encryption keys they are planning to use envelope encryption. Which of the following processes is a correct implementation of envelope encryption?

Options :

A : Encrypt plaintext data with a data key and then encrypt the data key with a top-level encrypted master key

B : Encrypt plaintext data with a master key and then encrypt the master key with a top-level encrypted data key

C : Encrypt plaintext data with a data key and then encrypt the data key with a top-level plaintext master key.

D : Encrypt plaintext data with a master key and then encrypt the master key with a top-level plaintext data key

Answer: C

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