A user has created a VPC with CIDR 20.0.0.0/16. The user has created one subnet with CIDR 20.0.0.0/16 in this VPC. The user is trying to create another subnet with the same VPC for CIDR 20.0.0.1/24.
What will happen in this scenario?
C
A Virtual Private Cloud (VPC) is a virtual network dedicated to the user's AWS account. A user can create a subnet with VPC and launch instances inside that subnet. The user can create a subnet with the same size of VPC. However, he cannot create any other subnet since the CIDR of the second subnet will conflict with the first subnet.
Reference:
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Subnets.html
True or False: The Amazon ElastiCache clusters are not available for use in VPC at this time.
D
Amazon Elasticache clusters can be run in an Amazon VPC. With Amazon VPC, you can define a virtual network topology and customize the network configuration to closely resemble a traditional network that you might operate in your own datacenter. You can now take advantage of the manageability, availability and scalability benefits of Amazon ElastiCache Clusters in your own isolated network. The same functionality of Amazon ElastiCache, including automatic failure detection, recovery, scaling, auto discovery, Amazon CloudWatch metrics, and software patching, are now available in Amazon VPC.
Reference:
http://aws.amazon.com/about-aws/whats-new/2012/12/20/amazon-elasticache-announces-support-for-amazon-vpc/
In Amazon Redshift, how many slices does a dw2.8xlarge node have?
C
The disk storage for a compute node in Amazon Redshift is divided into a number of slices, equal to the number of processor cores on the node. For example, each DW1.XL compute node has two slices, and each DW2.8XL compute node has 32 slices.
Reference:
http://docs.aws.amazon.com/redshift/latest/dg/t_Distributing_data.html
Identify a true statement about using an IAM role to grant permissions to applications running on Amazon EC2 instances.
C
Using IAM roles to grant permissions to applications that run on EC2 instances requires a bit of extra configuration. Because role credentials are temporary and rotated automatically, you don't have to manage credentials, and you don't have to worry about long-term security risks.
Reference:
http://docs.aws.amazon.com/IAM/latest/UserGuide/role-usecase-ec2app.html
Out of the striping options available for the EBS volumes, which one has the following disadvantage:
'Doubles the amount of I/O required from the instance to EBS compared to RAID 0, because you're mirroring all writes to a pair of volumes, limiting how much you can stripe.'?
C
RAID 1+0 (RAID 10) doubles the amount of I/O required from the instance to EBS compared to RAID 0, because you're mirroring all writes to a pair of volumes, limiting how much you can stripe.
Reference:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/raid-config.html
In the context of IAM roles for Amazon EC2, which of the following NOT true about delegating permission to make API requests?
A
Amazon designed IAM roles so that your applications can securely make API requests from your instances, without requiring you to manage the security credentials that the applications use.
Instead of creating and distributing your AWS credentials, you can delegate permission to make API requests using IAM roles as follows: Create an IAM role.
Define which accounts or AWS services can assume the role. Define which API actions and resources the application can use after assuming the role. Specify the role when you launch your instances. Have the application retrieve a set of temporary credentials and use them.
Reference:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html
In the context of Amazon ElastiCache CLI, which of the following commands can you use to view all ElastiCache instance events for the past 24 hours?
D
In Amazon ElastiCache, the code "aws elasticache describe-events --source-type cache-cluster -- duration 1440" is used to list the cache-cluster events for the past 24 hours (1440 minutes).
Reference:
http://docs.aws.amazon.com/AmazonElastiCache/latest/UserGuide/ECEvents.Viewing.html
In Amazon Cognito what is a silent push notification?
A
Amazon Cognito uses the Amazon Simple Notification Service (SNS) to send silent push notifications to devices. A silent push notification is a push message that is received by your application on a user's device that will not be seen by the user.
Reference:
http://aws.amazon.com/cognito/faqs/
When using Numeric Conditions within IAM, short versions of the available comparators can be used instead of the more verbose versions.
Which of the following is the short version of the Numeric Condition "NumericLessThanEquals"?
A
When using Numeric Conditions within IAM, short versions of the available comparators can be used instead of the more verbose versions. For instance, numIteq is the short version of NumericLessThanEquals.
Reference:
http://awsdocs.s3.amazonaws.com/SQS/2011-10-01/sqs-dg-2011-10-01.pdf
AWS has launched T2 instances which come with CPU usage credit. An organization has a requirement which keeps an instance running for 24 hours. However, the organization has high usage only during 11 AM to 12 PM. The organization is planning to use a T2 small instance for this purpose.
If the organization already has multiple instances running since Jan 2012, which of the below mentioned options should the organization implement while launching a T2 instance?
C
A Virtual Private Cloud (VPC) is a virtual network dedicated to the user's AWS account. The user can create subnets as per the requirement within a VPC. The
AWS account provides two platforms:
EC2-CLASSIC and EC2-VPC, depending on when the user has created his AWS account and which regions he is using. If the user has created the AWS account after 2013-12-04, it supports only EC2-VPC. In this scenario, since the account is before the required date the supported platform will be EC2-CLASSIC. It is required that the organization creates a VPC as the T2 instances can be launched only as a part of VPC.
Reference:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/vpc-migrate.html
