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Q61. – (Topic 3) 

You have a proprietary data store on-premises that must be backed up daily by dumping the data store contents to a single compressed 50GB file and sending the file to AWS. Your SLAs state that any dump file backed up within the past 7 days can be retrieved within 2 hours. Your compliance department has stated that all data must be held indefinitely. The time required to restore the data store from a backup is approximately 1 hour. Your on-premise network connection is capable of sustaining 1gbps to AWS. 

Which backup methods to AWS would be most cost-effective while still meeting all of your requirements? 

A. Send the daily backup files to Glacier immediately after being generated 

B. Transfer the daily backup files to an EBS volume in AWS and take daily snapshots of the volume 

C. Transfer the daily backup files to S3 and use appropriate bucket lifecycle policies to send to Glacier 

D. Host the backup files on a Storage Gateway with Gateway-Cached Volumes and take daily snapshots 

Answer:

Explanation: Reference: 

http://aws.amazon.com/storagegateway/faqs/ 

Q62. – (Topic 3) 

A user has setup an Auto Scaling group. The group has failed to launch a single instance for more than 24 hours. What will happen to Auto Scaling in this condition? 

A. Auto Scaling will keep trying to launch the instance for 72 hours 

B. Auto Scaling will suspend the scaling process 

C. Auto Scaling will start an instance in a separate region 

D. The Auto Scaling group will be terminated automatically 

Answer:

Explanation: 

If Auto Scaling is trying to launch an instance and if the launching of the instance fails continuously, it will suspend the processes for the Auto Scaling groups since it repeatedly failed to launch an instance. This is known as an administrative suspension. It commonly applies to the Auto Scaling group that has no running instances which is trying to launch instances for more than 24 hours, and has not succeeded in that to do so. 

Q63. – (Topic 3) 

A user has launched an EBS backed EC2 instance in the US-East-1a region. The user stopped the instance and started it back after 20 days. AWS throws up an ‘InsufficientInstanceCapacity’ error. What can be the possible reason for this? 

A. AWS does not have sufficient capacity in that availability zone 

B. AWS zone mapping is changed for that user account 

C. There is some issue with the host capacity on which the instance is launched 

D. The user account has reached the maximum EC2 instance limit 

Answer:

Explanation: 

When the user gets an ‘InsufficientInstanceCapacity’ error while launching or starting an EC2 instance, it means that AWS does not currently have enough available capacity to service the user request. If the user is requesting a large number of instances, there might not be enough server capacity to host them. The user can either try again later, by specifying a smaller number of instances or changing the availability zone if launching a fresh instance. 

Q64. – (Topic 2) 

A user wants to make so that whenever the CPU utilization of the AWS EC2 instance is above 90%, the redlight of his bedroom turns on. Which of the below mentioned AWS services is helpful for this purpose? 

A. AWS CloudWatch + AWS SES 

B. AWS CloudWatch + AWS SNS 

C. None. It is not possible to configure the light with the AWS infrastructure services 

D. AWS CloudWatch and a dedicated software turning on the light 

Answer:

Explanation: 

Amazon Simple Notification Service (Amazon SNS. is a fast, flexible, and fully managed push messaging service. Amazon SNS can deliver notifications by SMS text message or email to the Amazon Simple Queue Service (SQS. queues or to any HTTP endpoint. The user can configure some sensor devices at his home which receives data on the HTTP end point (REST calls. and turn on the red light. The user can configure the CloudWatch alarm to send a notification to the AWS SNS HTTP end point (the sensor device. and it will turn the light red when there is an alarm condition. 

Q65. – (Topic 3) 

A sysadmin has created the below mentioned policy on an S3 bucket named cloudacademy. What does this policy define? 

"Statement": [{ 

"Sid": "Stmt1388811069831", 

"Effect": "Allow", 

"Principal": { "AWS": "*"}, 

"Action": [ "s3:GetObjectAcl", "s3:ListBucket"], 

"Resource": [ "arn:aws:s3:::cloudacademy] 

}] 

A. It will make the cloudacademy bucket as well as all its objects as public 

B. It will allow everyone to view the ACL of the bucket 

C. It will give an error as no object is defined as part of the policy while the action defines the rule about the object 

D. It will make the cloudacademy bucket as public 

Answer:

Explanation: 

A sysadmin can grant permission to the S3 objects or the buckets to any user or make objects public using the bucket policy and user policy. Both use the JSON-based access policy language. Generally if the user is defining the ACL on the bucket, the objects in the bucket do not inherit it and vice a versa. The bucket policy can be defined at the bucket level which allows the objects as well as the bucket to be public with a single policy applied to that bucket. In the sample policy the action says “S3:ListBucket” for effect Allow on 

Resource arn:aws:s3:::cloudacademy. This will make the cloudacademy bucket public. 

"Statement": [{ 

"Sid": "Stmt1388811069831", 

"Effect": "Allow", 

"Principal": { "AWS": "*" }, 

"Action": [ "s3:GetObjectAcl", "s3:ListBucket"], 

"Resource": [ "arn:aws:s3:::cloudacademy] 

}] 

Q66. – (Topic 3) 

A user is receiving a notification from the RDS DB whenever there is a change in the DB security group. The user does not want to receive these notifications for only a month. Thus, he does not want to delete the notification. How can the user configure this? 

A. Change the Disable button for notification to “Yes” in the RDS console 

B. Set the send mail flag to false in the DB event notification console 

C. The only option is to delete the notification from the console 

D. Change the Enable button for notification to “No” in the RDS console 

Answer:

Explanation: 

Amazon RDS uses the Amazon Simple Notification Service to provide a notification when an Amazon RDS event occurs. Event notifications are sent to the addresses that the user has provided while creating the subscription. The user can easily turn off the notification without deleting a subscription by setting the Enabled radio button to No in the Amazon RDS console or by setting the Enabled parameter to false using the CLI or Amazon RDS API. 

Q67. – (Topic 2) 

A user has created a queue named “myqueue” with SQS. There are four messages published to queue which are not received by the consumer yet. If the user tries to delete the queue, what will happen? 

A. A user can never delete a queue manually. AWS deletes it after 30 days of inactivity on queue 

B. It will delete the queue 

C. It will initiate the delete but wait for four days before deleting until all messages are deleted automatically. 

D. I t will ask user to delete the messages first 

Answer:

Explanation: 

SQS allows the user to move data between distributed components of applications so they can perform different tasks without losing messages or requiring each component to be always available. The user can delete a queue at any time, whether it is empty or not. It is important to note that queues retain messages for a set period of time. By default, a queue retains messages for four days. 

Q68. – (Topic 1) 

You are using ElastiCache Memcached to store session state and cache database queries in your infrastructure. You notice in CloudWatch that Evictions and GetMisses are Doth very high. 

What two actions could you take to rectify this? 

Choose 2 answers 

A. Increase the number of nodes in your cluster 

B. Tweak the max_item_size parameter 

C. Shrink the number of nodes in your cluster 

D. Increase the size of the nodes in the duster 

Answer: B,D 

Q69. – (Topic 3) 

A user has configured an ELB to distribute the traffic among multiple instances. The user instances are facing some issues due to the back-end servers. Which of the below mentioned CloudWatch metrics helps the user understand the issue with the instances? 

A. HTTPCode_Backend_3XX 

B. HTTPCode_Backend_4XX 

C. HTTPCode_Backend_2XX 

D. HTTPCode_Backend_5XX 

Answer:

Explanation: 

CloudWatch is used to monitor AWS as well as the custom services. For ELB, CloudWatch provides various metrics including error code by ELB as well as by back-end servers (instances.. It gives data for the count of the number of HTTP response codes generated by the back-end instances. This metric does not include any response codes generated by the load balancer. These metrics are: The 2XX class status codes represents successful actions The 3XX class status code indicates that the user agent requires action The 4XX class status code represents client errors 

The 5XX class status code represents back-end server errors 

Q70. – (Topic 3) 

A user has created an EBS volume of 10 GB and attached it to a running instance. The user is trying to access EBS for first time. Which of the below mentioned options is the correct statement with respect to a first time EBS access? 

A. The volume will show a size of 8 GB 

B. The volume will show a loss of the IOPS performance the first time 

C. The volume will be blank 

D. If the EBS is mounted it will ask the user to create a file system 

Answer:

Explanation: 

A user can create an EBS volume either from a snapshot or as a blank volume. If the volume is from a snapshot it will not be blank. The volume shows the right size only as long as it is mounted. This shows that the file system is created. When the user is accessing the volume the AWS EBS will wipe out the block storage or instantiate from the snapshot. Thus, the volume will show a loss of IOPS. It is recommended that the user should pre warm the EBS before use to achieve better IO.