AWS Chapter 3

Which of the following designations would refer to the AWS US West(Oregon) region?

• us-east-1

• us-west-2

• us-west-2a

• us-west-2b

Answer explanation

Regions end in numbers, AZs end in a letter

Which of the following in an AWS Region for which customer access is restricted?

• AWS Admin

• US-DOD

• Asia Pacifici(Tokyo)

• AWS GovCloud

When you request a new virtual machine instance in EC2, your instance will automatically launch into the currently selected value of which of the following?

• Service

• Subnet

• Availability zone

• Region

Which of the following are not globally based AWS services?(Select Two)

• RDS

• Route 53

• EC2

• CloudFront

Answer explanation

B- Route 53 lives everywhere

D- Edge services a by design not regional

Which of the following would be a valid endpoint your developers could use to access a particular relational DB service instance you're running in the Northern Virginia region?

• us-east-1.amazonaws.com.rd

• ecs.eu-west-3.amazonaws.com

• rds.us-east-1.amazonaws.com

• rds.amazonaws.com.us-east-1

What are the most significant architectural benefits of the way AWS designed it's regions? (Select Two)

• It can make infrastructure more fault tolerant

• It can make applications available to end user with low latency

• It can make applications more compliant with local regulations

• It can bring down the price of running

Answer explanation

A- fault tolerance is within region, however global resiliency can increase application availability

Why is it that most AWS resources are tied to a single region?

• Because those resource are run on a physical device, and that device must live somewhere

• Because security considerations are best served by restricting access to a single physical location

• Because spreading them too far afield would introduce latency issues

• Because access to any one digital resource must always occur througha single physical gateway

You want to improve the resilience of your EC2 web server. Which of the following is he most effective and efficient approach?

• Launch parallel, load-balanced instance in multiple AWS regions

• Launch parallel, load-balanced instances in multiple zones within a single AWS region

• Launch parallel, autoscaled instances in multiple AWS regions

• Launch parallel, autoscaled instance in multiple availability zones within a single AWS region

Answer explanation

D is also correct, but viewed as an add-on to B.

Which of the following is the most accurate description of an AWS availability zone?

• One or more independently powered data centers running a wide range of hardware host types

• One or more independently powered data centers running a uniform hardware host type

• All the data centers located within a broad geographical area

• The infrastructure running within a single physical data center

Which of the following most accurately describes the subnet within AWS ecosystem?

• The virtual limits imposed on the network access permitted to a resource instance

• The block of IP addresses assigned for use within a single region

• The block of IP addresses assigned for use within a single availability zone

• The networking hardware used within a single availability zone