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NEW QUESTION: 1
True or false the text file shown in the figure below is an example of a fixed format text file.
A. True
B. False
Answer: A
NEW QUESTION: 2
DRAG DROP
Drag and drop the feature from the left onto the correct benefit on the right.
Answer:
Explanation:
Explanation: Congestion Notification
IEEE 802.1 Qau
Data center Bridging Exchange
DCBX
Priority-Based Flow Control
IEEE 802.1 Qbb
Enhanced transmission selection
IEEE 802.1 Qaz
NEW QUESTION: 3
You are using Elastic Beanstalk to manage your e-commerce store. The store is based on an open source e-
commerce platform and is deployed across multiple instances in an Auto Scaling group. Your development
team often creates new "extensions" for the e-commerce store. These extensions include PHP source code as
well as an SQL upgrade script used to make any necessary updates to the database schema. You have noticed
that some extension deployments fail due to an error when running the SQL upgrade script. After further
investigation, you realize that this is because the SQL script is being executed on all of your Amazon EC2
instances. How would you ensure that the SQL script is only executed once per deployment regardless of how
many Amazon EC2 instances are running at the time?
A. Make use of the Amazon EC2 metadata service to query whether the instance is marked as the leader" in
the Auto Scaling group. Only execute the script if "true" is returned.
B. Update the Amazon RDS security group to only allow write access from a single instance in the Auto
Scaling group; that way, only one instance will successfully execute the script on the database.
C. Use a "Solo Command" within an Elastic Beanstalk configuration file to execute the script. The Elastic
Beanstalk service will ensure that the command is only executed once.
D. Use a "Container command" within an Elastic Beanstalk configuration file to execute the script,
ensuring that the "leader only" flag is set to true.
Answer: D
Explanation:
Explanation
You can use the container_commands key to execute commands that affect your application source code.
Container commands run after the application and web server have been set up and the application version
archive has been extracted, but before the application version is deployed. Non-container commands and other
customization operations are performed prior to the application source code being extracted.
You can use leader_only to only run the command on a single instance, or configure a test to only run the
command when a test command evaluates to true. Leader-only container commands are only executed during
environment creation and deployments, while other commands and server customization operations are
performed every time an instance is provisioned or updated. Leader-only container commands are not
executed due to launch configuration changes, such as a change in the AMI Id or instance type. For more
information on customizing containers, please visit the below URL:
* http://docs.aws.a
mazon.com/elasticbeanstalk/latest/dg/customize-containers-ec2. html
NEW QUESTION: 4
A. Option A
B. Option D
C. Option C
D. Option B
Answer: D