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Q81. – (Topic 3) 

A user is using the AWS SQS to decouple the services. Which of the below mentioned operations is not 

supported by SQS? 

A. SendMessageBatch 

B. DeleteMessageBatch 

C. CreateQueue 

D. DeleteMessageQueue 

Answer:

Explanation: 

Amazon Simple Queue Service (SQS. is a fast, reliable, scalable, and fully managed message queuing service. SQS provides a simple and cost-effective way to decouple the components of an application. The user can perform the following set of operations using the Amazon SQS: 

CreateQueue, ListQueues, DeleteQueue, SendMessage, SendMessageBatch, 

ReceiveMessage, DeleteMessage, DeleteMessageBatch, ChangeMessageVisibility, 

ChangeMessageVisibilityBatch, SetQueueAttributes, GetQueueAttributes, GetQueueUrl, 

AddPermission and RemovePermission. Operations can be performed only by the AWS account owner or an AWS account that the account owner has delegated to. 

Q82. – (Topic 1) 

You have a server with a 5O0GB Amazon EBS data volume. The volume is 80% full. You need to back up the volume at regular intervals and be able to re-create the volume in a new Availability Zone in the shortest time possible. All applications using the volume can be paused for a period of a few minutes with no discernible user impact. 

Which of the following backup methods will best fulfill your requirements? 

A. Take periodic snapshots of the EBS volume 

B. Use a third party Incremental backup application to back up to Amazon Glacier 

C. Periodically back up all data to a single compressed archive and archive to Amazon S3 using a parallelized multi-part upload 

D. Create another EBS volume in the second Availability Zone attach it to the Amazon EC2 instance, and use a disk manager to mirror me two disks 

Answer:

Explanation: Reference: 

http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-creating-snapshot.html 

Q83. – (Topic 3) 

A user has launched an RDS postgreSQL DB with AWS. The user did not specify the maintenance window during creation. The user has configured RDS to update the DB instance type from micro to large. If the user wants to have it during the maintenance window, what will AWS do? 

A. AWS will not allow to update the DB until the maintenance window is configured 

B. AWS will select the default maintenance window if the user has not provided it 

C. AWS will ask the user to specify the maintenance window during the update 

D. It is not possible to change the DB size from micro to large with RDS 

Answer:

Explanation: 

AWS RDS has a compulsory maintenance window which by default is 30 minutes. If the user does not specify the maintenance window during the creation of RDS then AWS will select a 30-minute maintenance window randomly from an 8-hour block of time per region. In this case, Amazon RDS assigns a 30-minute maintenance window on a randomly selected day of the week. 

Q84. – (Topic 2) 

A sys admin is trying to understand EBS snapshots. Which of the below mentioned statements will not be 

useful to the admin to understand the concepts about a snapshot? 

A. The snapshot is synchronous 

B. It is recommended to stop the instance before taking a snapshot for consistent data 

C. The snapshot is incremental 

D. The snapshot captures the data that has been written to the hard disk when the snapshot command was executed 

Answer:

Explanation: 

The AWS snapshot is a point in time backup of an EBS volume. When the snapshot command is executed it will capture the current state of the data that is written on the drive and take a backup. For a better and consistent snapshot of the root EBS volume, AWS recommends stopping the instance. For additional volumes it is recommended to unmount the device. The snapshots are asynchronous and incremental. 

Q85. – (Topic 3) 

A user is planning to schedule a backup for an EBS volume. The user wants security of the snapshot data. How can the user achieve data encryption with a snapshot? 

A. Use encrypted EBS volumes so that the snapshot will be encrypted by AWS 

B. While creating a snapshot select the snapshot with encryption 

C. By default the snapshot is encrypted by AWS 

D. Enable server side encryption for the snapshot using S3 

Answer:

Explanation: 

AWS EBS supports encryption of the volume. It also supports creating volumes from existing snapshots provided the snapshots are created from encrypted volumes. The data at rest, the I/O as well as all the snapshots of the encrypted EBS will also be encrypted. EBS encryption is based on the AES-256 cryptographic algorithm, which is the industry standard. 

Q86. – (Topic 2) 

A user is trying to save some cost on the AWS services. Which of the below mentioned options will not help him save cost? 

A. Delete the unutilized EBS volumes once the instance is terminated 

B. Delete the AutoScaling launch configuration after the instances are terminated 

C. Release the elastic IP if not required once the instance is terminated 

D. Delete the AWS ELB after the instances are terminated 

Answer:

Explanation: 

AWS bills the user on a as pay as you go model. AWS will charge the user once the AWS resource is allocated. Even though the user is not using the resource, AWS will charge if it is in service or allocated. Thus, it is advised that once the user’s work is completed he should: Terminate the EC2 instance Delete the EBS volumes Release the unutilized Elastic IPs Delete ELB The AutoScaling launch configuration does not cost the user. Thus, it will not make any difference to the cost whether it is deleted or not. 

Q87. – (Topic 3) 

When an EC2 instance mat is backed by an S3-Dased AMI is terminated, what happens to the data on the root volume? 

A. Data is automatically deleted 

B. Data is automatically saved as an EBS snapshot. 

C. Data is unavailable until the instance is restarted 

D. Data is automatically saved as an EBS volume. 

Answer:

Q88. – (Topic 2) 

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. Always select the US-East-1-a zone for HA 

B. Do not select the AZ; instead let AWS select the AZ 

C. The user can never select the availability zone while launching an instance 

D. Always select the AZ while launching an instance 

Answer:

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. 

Q89. – (Topic 3) 

A user is running a batch process on EBS backed EC2 instances. The batch process starts a few instances to process hadoop Map reduce jobs which can run between 50 – 600 minutes or sometimes for more time. The user wants to configure that the instance gets terminated only when the process is completed. How can the user configure this with CloudWatch? 

A. Setup the CloudWatch action to terminate the instance when the CPU utilization is less than 5% 

B. Setup the CloudWatch with Auto Scaling to terminate all the instances 

C. Setup a job which terminates all instances after 600 minutes 

D. It is not possible to terminate instances automatically 

Answer:

Explanation: 

Amazon CloudWatch alarm watches a single metric over a time period that the user specifies and performs one or more actions based on the value of the metric relative to a given threshold over a number of time periods. The user can setup an action which terminates the instances when their CPU utilization is below a certain threshold for a certain period of time. The EC2 action can either terminate or stop the instance as part of the EC2 action. 

Q90. – (Topic 3) 

A sys admin has enabled logging on ELB. Which of the below mentioned fields will not be a part of the log file name? 

A. Load Balancer IP 

B. EC2 instance IP 

C. S3 bucket name 

D. Random string 

Answer:

Explanation: 

Elastic Load Balancing access logs capture detailed information for all the requests made to the load balancer. Elastic Load Balancing publishes a log file from each load balancer node at the interval that the user has specified. The load balancer can deliver multiple logs for the same period. Elastic Load Balancing creates log file names in the following format: “{Bucket}/{Prefix}/AWSLogs/{AWS AccountID}/elasticloadbalancing/{Region}/{Year}/{Month}/{Day}/{AWS Account ID}_elasticloadbalancing_{Region}_{Load Balancer Name}_{End Time}_{Load Balancer IP}_{Random String}.log“ 

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