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利用に値するAmazon AWS-SysOpsサンプル問題集の最新問題集

 

NO.1 A user runs the command "dd if=/dev/xvdf of=/dev/null bs=1M" on an EBS volume created
from a snapshot and attached to a Linux instance. Which of the below mentioned activities is the
user performing with the step given above?
A. Pre warming the EBS volume
B. Copying the data from a snapshot to the device
C. Initiating the device to mount on the EBS volume
D. Formatting the volume
Answer: A
Explanation:
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.

NO.2 A user has configured an EC2 instance in the US-East-1a zone. The user has enabled detailed
monitoring of the instance. The user is trying to get the data from CloudWatch using a CLI. Which of
the below mentioned CloudWatch endpoint URLs should the user use?
A. monitoring.us-east-1.amazonaws.com
B. monitoring.us-east-1a.amazonaws.com
C. monitoring.us-east-1-a.amazonaws.com
D. cloudwatch.us-east-1a.amazonaws.com
Answer: A

AWS-SysOps認定   
Explanation:
The CloudWatch resources are always region specific and they will have the end point as region
specific. If the user is trying to access the metric in the US-East-1 region, the endpoint URL will be:
monitoring.us-east- 1.amazonaws.com

NO.3 Your entire AWS infrastructure lives inside of one Amazon VPC You have an Infrastructure
monitoring application running on an Amazon instance in Availability Zone (AZ) A of the region, and
another application instance running in AZ B.
The monitoring application needs to make use of ICMP ping to confirm network reachability of the
instance hosting the application.
Can you configure the security groups for these instances to only allow the ICMP ping to pass from
the monitoringinstance to the application instance and nothing else'' If so how?
A. No Two instances in two different AZ's can't talk directly to each other via ICMP ping as that
protocol is not allowed across subnet (iebroadcast) boundaries
B. Yes, The security group for the monitoring instance needs to allow outbound ICMP and the
application instance's security group needs to allow Inbound ICMP
C. Yes Both the monitoring instance and the application instance have to be a part of the same
security group, and that security group needs to allow inbound ICMP
D. Yes, Both the monitoring instance's security group and the application instance's security group
need to allow both inbound and outbound ICMP ping packets since ICMP is not a connection-
oriented protocol
Answer: D

NO.4 A user is launching an EC2 instance in the US East region.
Which of the below mentioned options is recommended by AWS with respect to the selection of the
availability zone?
A. The user can never select the availability zone while launching an instance
B. Do not select the AZ; instead let AWS select the AZ
C. Always select the US-East-1-a zone for HA
D. Always select the AZ while launching an instance
Answer: B

AWS-SysOps受験対策解説集   
Explanation:
When launching an instance with EC2, AWS recommends not to select the availability zone (AZ.. AWS
specifies that the default Availability Zone should be accepted. This is because it enables AWS to
select the best Availability Zone based on the system health and available capacity. If the user
launches additional instances, only then an Availability Zone should be specified. This is to specify the
same or different AZ from the running instances.

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AWS-SysOps試験番号:AWS-SysOps問題集
試験科目:AWS Certified SysOps Administrator - Associate
最近更新時間:2016-12-25
問題と解答:全303問 AWS-SysOps 日本語対策
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