Domain 2: Design High-Performing Architectures

Question 1

Scenario:

Implement a fanout messaging.

Answer 1

Solution:

Create an SNS topic with a message filtering policy
and configure multiple SQS queues to subscribe to
the topic.

Question 2

Scenario:

A database that has a read replication latency of less
than 1 second.

Answer 2

Solution:

Use Amazon Aurora with cross-region replicas.

Question 3

Scenario:

A specific type of Elastic Load Balancer that uses UDP
as the protocol for communication between clients
and thousands of game servers around the world.

Answer 3

Solution:

Use Network Load Balancer for TCP/UDP protocols.

Question 4

Scenario:

Monitor the memory and disk space utilization of an
EC2 i nstance.

Answer 4

Solution:

Install Amazon CloudWatch agent on the instance.

Question 5

Scenario:

Retrieve a subset of data from a l arge CSV file stored
in the S3 bucket.

Answer 5

Solution:

Perform an S3 Select operation based on the
bucket’s name and object’s key.

Question 6

Scenario:

Upload 1 TB file to an S3 bucket.

Answer 6

Solution:

Use Amazon S3 multipart upload API to upload l arge
objects i n parts.

Question 7

Scenario:

Improve the performance of the application by
reducing the response times from milliseconds to
microseconds.

Answer 7

Solution:

Use Amazon DynamoDB Accelerator (DAX)

Question 8

Scenario:

Retrieve the i nstance ID, public keys, and public IP
address of an EC2 i nstance.

Answer 8

Solution:

Access the url:
http://169.254.169.254/latest/meta-data/ using the
EC2 i nstance.

Question 9

Scenario:

Route the i nternet traffic to the resources based on the
location of the user.

Answer 9

Solution:

Use Route 53 Geolocation Routing policy.