AWS-Certified-Solutions-Architect-Professional Free Practice Test

In Amazon EIastiCache, the failure of a single cache node can have an impact on the availability of your application and the load on your back-end database while EIastiCache provisions a replacement for the failed cache node and it get repopulated. Which of the following is a solution to reduce this potential availability impact?

1. A. Spread your memory and compute capacity over fewer number of cache nodes, each with smaller capacity.
2. B. Spread your memory and compute capacity over a larger number of cache nodes, each with smaller capacity.
3. C. Include fewer number of high capacity nodes.
4. D. Include a larger number of cache nodes, each with high capacit

Correct Answer: B
In Amazon EIastiCache, the number of cache nodes in the cluster is a key factor in the availability of your cluster running Memcached. The failure of a single cache node can have an impact on the availability of your application and the load on your back-end database while EIastiCache provisions a replacement for the failed cache node and it get repopulated. You can reduce this potential availability impact by spreading your memory and compute capacity over a larger number of cache nodes, each with smaller capacity, rather than using a fewer number of high capacity nodes.
Reference: http://docs.aws.amazon.com/AmazonEIastiCache/Iatest/UserGuide/CacheNode.Memcached.htmI

An organization is planning to setup a management network on the AWS VPC. The organization is trying to secure the webserver on a single VPC instance such that it allows the internet traffic as well as the back-end management traffic. The organization wants to make so that the back end management network
interface can receive the SSH traffic only from a selected IP range, while the internet facing webserver will have an IP address which can receive traffic from all the internet IPs.
How can the organization achieve this by running web server on a single instance?

1. A. It is not possible to have two IP addresses for a single instance.
2. B. The organization should create two network interfaces with the same subnet and security group to assign separate IPs to each network interface.
3. C. The organization should create two network interfaces with separate subnets so one instance can have two subnets and the respective security groups for controlled access.
4. D. The organization should launch an instance with two separate subnets using the same network interface which allows to have a separate CIDR as well as security groups.

Correct Answer: C
A Virtual Private Cloud (VPC) is a virtual network dedicated to the user’s AWS account. It enables the user to launch AWS resources into a virtual network that the user has defined. An Elastic Network Interface (ENI) is a virtual network interface that the user can attach to an instance in a VPC.
The user can create a management network using two separate network interfaces. For the present scenario it is required that the secondary network interface on the instance handles the public facing traffic and the primary network interface handles the back-end management traffic and it is connected to a separate subnet in the VPC that has more restrictive access controls. The public facing interface, which may or may not be behind a load balancer, has an associated security group to allow access to the server from the internet while the private facing interface has an associated security group allowing SSH access only from an allowed range of IP addresses either within the VPC or from the internet, a private subnet within the VPC or a virtual private gateway.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.htmI

You have a periodic Image analysis application that gets some files In Input analyzes them and tor each file writes some data in output to a ten file the number of files in input per day is high and concentrated in a few hours of the day.
Currently you have a server on EC2 with a large EBS volume that hosts the input data and the results it takes almost 20 hours per day to complete the process
What services could be used to reduce the elaboration time and improve the availability of the solution?

1. A. S3 to store I/O file
2. B. SQS to distribute elaboration commands to a group of hosts working in paralle
3. C. Auto scaling to dynamically size the group of hosts depending on the length of the SQS queue
4. D. EBS with Provisioned IOPS (PIOPS) to store I/O file
5. E. SNS to distribute elaboration commands to a group of hosts working in parallel Auto Scaling to dynamically size the group of hosts depending on the number of SNS notifications
6. F. S3 to store I/O files, SNS to distribute evaporation commands to a group of hosts working in paralle
7. G. Auto scaling to dynamically size the group of hosts depending on the number of SNS notifications
8. H. EBS with Provisioned IOPS (PIOPS) to store I/O files SQS to distribute elaboration commands to a group of hosts working in parallel Auto Scaling to dynamically size the group ot hosts depending on the length of the SQS queue.

Correct Answer: D

You want to use AWS CodeDepIoy to deploy an application to Amazon EC2 instances running within an Amazon Virtual Private Cloud (VPC). What criterion must be met for this to be possible?

1. A. The AWS CodeDepIoy agent installed on the Amazon EC2 instances must be able to access only the public AWS CodeDepIoy endpoint.
2. B. The AWS CodeDepIoy agent installed on the Amazon EC2 instances must be able to access only the public Amazon S3 service endpoint.
3. C. The AWS CodeDepIoy agent installed on the Amazon EC2 instances must be able to access the public AWS CodeDepIoy and Amazon S3 service endpoints.
4. D. It is not currently possible to use AWS CodeDepIoy to deploy an application to Amazon EC2 instances running within an Amazon Virtual Private Cloud (VPC.)

Correct Answer: C
You can use AWS CodeDepIoy to deploy an application to Amazon EC2 instances running within an Amazon Virtual Private Cloud (VPC). However, the AWS CodeDepIoy agent installed on the Amazon EC2 instances must be able to access the public AWS CodeDepIoy and Amazon S3 service endpoints. Reference: http://aws.amazon.com/codedepIoy/faqs/

A read only news reporting site with a combined web and application tier and a database tier that receives large and unpredictable traffic demands must be able to respond to these traffic fluctuations automatically. What AWS services should be used meet these requirements?

1. A. Stateless instances for the web and application tier synchronized using EIastiCache Memcached in an autoscaimg group monitored with CIoudWatch and RDS with read replicas.
2. B. Stateful instances for the web and application tier in an autoscaling group monitored with CIoudWatch and RDS with read replicas.
3. C. Stateful instances for the web and application tier in an autoscaling group monitored with CIoudWatc
4. D. And multi-AZ RDS.
5. E. Stateless instances for the web and application tier synchronized using EIastiCache Memcached in an autoscaling group monitored with CIoudWatch and multi-AZ RDS.

Correct Answer: A