B.

Denies the server with the IP address 192 168 100 188 full access to the "mybucket"
bucket

D.

The volume size is too large

When the application does not experience the expected IOPS or throughput of the PIOPS
EBS volume that was provisioned, the possible root cause could be that the EC2
bandwidth is the limiting factor and the instance might not be either EBS-optimized or might
not have 10 Gigabit network connectivity. Another possible cause for not experiencing the
expected IOPS could also be that the user is not driving enough I/O to the EBS volumes.
The size of the volume may not affect IOPS.

A.

Increase the desired capacity of the Auto Scaling group

A user can increase the desired capacity of the Auto Scaling group and Auto Scaling will
launch a new instance as per the new capacity. The newly launched instances will be
registered with ELB if Auto Scaling group is configured with ELB. If the user decreases the
minimum size the instances will be removed from Auto Scaling. Increasing the maximum
size will not add instances but only set the maximum instance cap.

A.

Cloudformation follows the DevOps model for the creation of Dev & Test

AWS Cloudformation is an application management tool which provides application
modelling, deployment, configuration, management and related activities. It supports a
wide variety of AWS services, such as EC2, EBS, AS, ELB, RDS, VPC, etc. It also
provides application bootstrapping scripts which enable the user to install software
packages or create folders. It is free of the cost and only charges the user for the services
created with it. The only challenge is that it does not follow any model, such as DevOps;
instead customers can define templates and use them to provision and manage the AWS
resources in an orderly way.

A.

Route 53

The user can provide high availability and redundancy for applications running behind
Elastic Load Balancer by enabling the Amazon Route 53 Domain Name System (DNS.
failover for the load balancers. Amazon Route 53 is a DNS service that provides reliable
routing to the user’s infrastructure.

A.

Create an IAM role with the Put MetricData permission and modify the Auto Scaling
launch configuration to launch instances in that role

A.

Pre warming the EBS volume

When the user creates an EBS volume and is trying to access it for the first time it will
encounter reduced IOPS due to wiping or initiating of the block storage. To avoid this as
well as achieve the best performance it is required to pre warm the EBS volume. For a
volume created from a snapshot and attached with a Linux OS, the “dd” command pre
warms the existing data on EBS and any restored snapshots of volumes that have been
previously fully pre warmed. This command maintains incremental snapshots; however,
because this operation is read-only, it does not pre warm unused space that has never
been written to on the original volume. In the command “dd if=/dev/xvdf of=/dev/null
bs=1M” , the parameter “if=input file” should be set to the drive that the user wishes to
warm. The “of=output file” parameter should be set to the Linux null virtual device,
/dev/null. The “bs” parameter sets the block size of the read operation; for optimal
performance, this should be set to 1 MB.

D.

john#cloud

AWS Identity and Access Management is a web service which allows organizations to
manage users and user permissions for various AWS services. Whenever the organization
is creating an IAM user, there should be a unique ID for each user. The names of users,
groups, roles, instance profiles must be alphanumeric, including the following common
characters: plus (+., equal (=., comma (,., period (.., at (@., and dash (-..