aws certified sysops administrator [Jun 2017]

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Q181. – (Topic 3) 

A user has launched an EC2 instance and deployed a production application in it. The user wants to prohibit any mistakes from the production team to avoid accidental termination. 

How can the user achieve this? 

A. The user can the set DisableApiTermination attribute to avoid accidental termination 

B. It is not possible to avoid accidental termination 

C. The user can set the Deletion termination flag to avoid accidental termination 

D. The user can set the InstanceInitiatedShutdownBehavior flag to avoid accidental termination 

Answer:

Explanation: 

It is always possible that someone can terminate an EC2 instance using the Amazon EC2 console, command line interface or API by mistake. If the admin wants to prevent the instance from being accidentally terminated, he can enable termination protection for that instance. The DisableApiTermination attribute controls whether the instance can be terminated using the console, CLI or API. By default, termination protection is disabled for an EC2 instance. When it is set it will not allow the user to terminate the instance from CLI, API or the console. 

Q182. – (Topic 2) 

A user has setup an EBS backed instance and a CloudWatch alarm when the CPU utilization is more than 65%. The user has setup the alarm to watch it for 5 periods of 5 minutes each. The CPU utilization is 60% between 9 AM to 6 PM. The user has stopped the EC2 instance for 15 minutes between 11 AM to 11:15 AM. What will be the status of the alarm at 11:30 AM? 

A. Alarm 

B. OK 

C. Insufficient Data 

D. Error 

Answer:

Explanation: 

Amazon CloudWatch alarm watches a single metric over a time period 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 state of the alarm will be OK for the whole 

day. When the user stops the instance for three periods the alarm may not receive the data 

Q183. – (Topic 3) 

A user wants to find the particular error that occurred on a certain date in the AWS MySQL RDS DB. Which of the below mentioned activities may help the user to get the data easily? 

A. It is not possible to get the log files for MySQL RDS 

B. Find all the transaction logs and query on those records 

C. Direct the logs to the DB table and then query that table 

D. Download the log file to DynamoDB and search for the record 

Answer:

Explanation: 

The user can view, download, and watch the database logs using the Amazon RDS console, the Command Line Interface (CLI. or the Amazon RDS API. For the MySQL RDS, the user can view the error log, slow query log, and general logs. The user can also view the MySQL logs easily by directing the logs to a database table in the main database and querying that table. 

Q184. – (Topic 2) 

A user has configured Elastic Load Balancing by enabling a Secure Socket Layer (SSL. negotiation 

configuration known as a Security Policy. Which of the below mentioned options is not part of this secure policy while negotiating the SSL connection between the user and the client? 

A. SSL Protocols 

B. Client Order Preference 

C. SSL Ciphers 

D. Server Order Preference 

Answer:

Explanation: 

Elastic Load Balancing uses a Secure Socket Layer (SSL. negotiation configuration which is known as a Security Policy. It is used to negotiate the SSL connections between a client and the load balancer. A security policy is a combination of SSL Protocols, SSL Ciphers, and the Server Order Preference option. 

Q185. – (Topic 1) 

You have a Linux EC2 web server instance running inside a VPC The instance is In a public subnet and has an EIP associated with it so you can connect to It over the Internet via HTTP or SSH The instance was also fully accessible when you last logged in via SSH. and was also serving web requests on port 80. 

Now you are not able to SSH into the host nor does it respond to web requests on port 80 that were working fine last time you checked You have double-checked that all networking configuration parameters (security groups route tables. IGW'EIP. NACLs etc) are properly configured {and you haven’t made any changes to those anyway since you were last able to reach the Instance). You look at the EC2 console and notice that system status check shows "impaired." 

Which should be your next step in troubleshooting and attempting to get the instance back to a healthy state so that you can log in again? 

A. Stop and start the instance so that it will be able to be redeployed on a healthy host system that most likely will fix the "impaired" system status 

B. Reboot your instance so that the operating system will have a chance to boot in a clean healthy state that most likely will fix the 'impaired" system status 

C. Add another dynamic private IP address to me instance and try to connect via mat new path, since the networking stack of the OS may be locked up causing the “impaired” system status. 

D. Add another Elastic Network Interface to the instance and try to connect via that new path since the networking stack of the OS may be locked up causing the "impaired" system status 

E. un-map and then re-map the EIP to the instance, since the IGWVNAT gateway may not be working properly, causing the "impaired" system status 

Answer:

Topic 2, Volume B 

56. – (Topic 2) 

A user is accessing RDS from an application. The user has enabled the Multi AZ feature with the MS SQL RDS DB. During a planned outage how will AWS ensure that a switch from DB to a standby replica will not affect access to the application? 

A. RDS will have an internal IP which will redirect all requests to the new DB 

B. RDS uses DNS to switch over to stand by replica for seamless transition 

C. The switch over changes Hardware so RDS does not need to worry about access 

D. RDS will have both the DBs running independently and the user has to manually switch over 

Answer:

Explanation: 

In the event of a planned or unplanned outage of a DB instance, Amazon RDS automatically switches to a standby replica in another Availability Zone if the user has enabled Multi AZ. The automatic failover mechanism simply changes the DNS record of the DB instance to point to the standby DB instance. As a result, the user will need to re-establish any existing connections to the DB instance. However, as the DNS is the same, the application can access DB seamlessly. 

Q186. – (Topic 3) 

Your mission is to create a lights-out datacenter environment, and you plan to use AWS OpsWorks to accomplish this. First you created a stack and added an App Server layer with an instance running in it. Next you added an application to the instance, and now you need to deploy a MySQL RDS database instance. 

Which of the following answers accurately describe how to add a backend database server to an OpsWorks stack? Choose 3 answers 

A. Add a new database layer and then add recipes to the deploy actions of the database and App Server layers. 

B. Use OpsWorks' "Clone Stack" feature to create a second RDS stack in another Availability Zone for redundancy in the event of a failure in the Primary AZ. To switch to the secondary RDS instance, set the [:database] attributes to values that are appropriate for your server which you can do by using custom JSON. 

C. The variables that characterize the RDS database connection—host, user, and so on—are set using the corresponding values from the deploy JSON's [:depioy][:app_name][:database] attributes. 

D. Cookbook attributes are stored in a repository, so OpsWorks requires that the "password": "your_password" attribute for the RDS instance must be encrypted using at least a 256-bit key. 

E. Set up the connection between the app server and the RDS layer by using a custom recipe. The recipe configures the app server as required, typically by creating a configuration file. The recipe gets the connection data such as the host and database name from a set of attributes in the stack configuration and deployment JSON that AWS OpsWorks installs on every instance. 

Answer: B,C,E 

Q187. – (Topic 2) 

A user is trying to understand AWS SNS. To which of the below mentioned end points is SNS unable to send a notification? 

A. Email JSON 

B. HTTP 

C. AWS SQS 

D. AWS SES 

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 select one the following transports as part of the subscription requests: “HTTP”, “HTTPS”,”Email”, “Email-JSON”, “SQS”, “and SMS”. 

Q188. – (Topic 2) 

A user has setup a web application on EC2. The user is generating a log of the application performance at every second. There are multiple entries for each second. If the user wants to send that data to CloudWatch every minute, what should he do? 

A. The user should send only the data of the 60th second as CloudWatch will map the receive data timezone with the sent data timezone 

B. It is not possible to send the custom metric to CloudWatch every minute 

C. Give CloudWatch the Min, Max, Sum, and SampleCount of a number of every minute 

D. Calculate the average of one minute and send the data to CloudWatch 

Answer:

Explanation: 

Amazon CloudWatch aggregates statistics according to the period length that the user has specified while getting data from CloudWatch. The user can publish as many data points as he wants with the same or similartime stamps. CloudWatch aggregates them by the period length when the user calls get statistics about those data points. CloudWatch records the average (sum of all items divided by the number of items. of the values received for every 1-minute period, as well as the number of samples, maximum value, and minimum value for the same time period. CloudWatch will aggregate all the data which have time stamps within a one-minute period. 

Q189. – (Topic 2) 

An organization has added 3 of his AWS accounts to consolidated billing. One of the AWS accounts has 

purchased a Reserved Instance (RI. of a small instance size in the US-East-1a zone. All other AWS accounts are running instances of a small size in the same zone. What will happen in this case for the RI pricing? 

A. Only the account that has purchased the RI will get the advantage of RI pricing 

B. One instance of a small size and running in the US-East-1a zone of each AWS account will get the benefit of RI pricing 

C. Any single instance from all the three accounts can get the benefit of AWS RI pricing if they are running in the same zone and are of the same size 

D. If there are more than one instances of a small size running across multiple accounts in the same zone no one will get the benefit of RI 

Answer:

Explanation: 

AWS consolidated billing enables the organization to consolidate payments for multiple Amazon Web Services (AWS. accounts within a single organization by making a single paying account. For billing purposes, consolidated billing treats all the accounts on the consolidated bill as one account. This means that all accounts on a consolidated bill can receive the hourly cost benefit of the Amazon EC2 Reserved Instances purchased by any other account. In this case only one Reserved Instance has been purchased by one account. Thus, only a single instance from any of the accounts will get the advantage of RI. AWS will implement the blended rate for each instance if more than one instance is running concurrently. 

Q190. – (Topic 3) 

An organization has configured two single availability zones. The Auto Scaling groups are configured in 

separate zones. The user wants to merge the groups such that one group spans across multiple zones. How can the user configure this? 

A. Run the command as-join-auto-scaling-group to join the two groups 

B. Run the command as-update-auto-scaling-group to configure one group to span across zones and delete the other group 

C. Run the command as-copy-auto-scaling-group to join the two groups 

D. Run the command as-merge-auto-scaling-group to merge the groups 

Answer:

Explanation: 

If the user has configured two separate single availability zone Auto Scaling groups and wants to merge them then he should update one of the groups and delete the other one. While updating the first group it is recommended that the user should increase the size of the minimum, maximum and desired capacity as a summation of both the groups. 

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