?and are treated as a logical grouping for the purposes of instance scaling and management. Reference: http://docs.aws.amazon.com/autoscaling/latest/userguide/AutoScalingGroup.html
Which service is offered by Auto Scaling?
A.Automatic scaling storage
B.Automatic scale EC2 capacity
C.Automatic scale ECS capacity
D.Automatic scale elastic IP
Auto Scaling is a service that allows users to scale the EC2 resources up or down automatically according to the conditions or by manual intervention. It is a seamless process to scale the EC2 compute units up and down.
Which of the scaling options given below is not supported by Auto Scaling?
A.All these options are supported by Auto Scaling
C.Scaling based on CPU utilization
D.Scaling based on time
Auto Scaling supports three types of scaling:
. Manual scaling
. Scaling based on condition (e.g. CPU utilization is up or down, etc.) . Scaling based on time (e.g. First day of the quarter, 6 am every day, etc.) Reference:
Security groups in Amazon VPC .
A.control incoming traffic only
B.control both inbound and outbound traffic
C.control neither incoming nor outgoing traffic
D.control outgoing traffic only
Security Groups in VPC allow you to specify rules for both outgoing and incoming traffic. Reference: http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_SecurityGroups.html
in VPC are stateful where return traffic is automatically allowed, regardless of any rules.
D.Geo Redundant Servers
Security groups in VPC are stateful where return traffic is automatically allowed without having to go through the whole evaluation process again. Network ACLs are stateless, meaning return traffic must be explicitly allowed by rules.
Reference: http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Security.html Question: 768
What happens if the instance launched by Auto Scaling becomes unhealthy?
A.Auto Scaling will terminate the instance and launch a new healthy instance.
B.Auto Scaling will terminate the instance but not launch a new instance.
C.The instance cannot become unhealthy.
D.Auto Scaling will notify the user and the user can update the instance.
Auto Scaling keeps checking the health of the EC2 instances launched by it at regular intervals. If an instance is observed as unhealthy, Auto Scaling will automatically terminate the instance and launch a new healthy instance. Thus, it maintains the number of instances as per the Auto Scaling group configuration.
Reference: http://docs.aws.amazon.com/AutoScaling/latest/DeveloperGuide/AutoScalingLifecycleHooks. html
A user is sending a custom metric to CloudWatch. If the call to the CloudWatch APIs has different dimensions, but the same metric name, how will CloudWatch treat all the requests?
A.It will treat each unique combination of dimensions as a separate metric.
B.It will group all the calls into a single call.
C.It will overwrite the previous dimension data with the new dimension data.
D.It will reject the request as there cannot be a separate dimension for a single metric.
A dimension is a key-value pair used to uniquely identify a metric. CloudWatch treats each unique combination of dimensions as a separate metric. Thus, if the user is making 4 calls with the same metric name but a separate dimension, it will create 4 separate metrics.
Reference: http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_conce pts.html
A user has enabled the CloudWatch alarm to estimate the usage charges. If the user disables monitoring of the estimated charges but does not delete the billing alert from the AWS account, what will happen?
A.The user cannot edit the existing billing alarm.
B.The data collection on estimated charges is stopped.
C.It is not possible to disable monitoring of the estimated charges.
D.AWS will stop sending the billing alerts to the user.
To create an alarm on the estimated AWS usage charges, a user must enable monitoring of
estimated AWS charges. This enables creating the metric data, which will be used to create a billing alarm. Once the estimated charges monitoring is enabled, the user cannot disable it. The user has to delete the alarms to stop receiving any notifications on billing.