AWS Certified SysOps Administrator - Associate Questions and Answers (Dumps and Practice Questions)
Question : 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.
1. A,C,D
2. B,C,D
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4. A,B,D
5. B,C,E
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Explanation: A private IP address is an IP address that's not reachable over the Internet. You can use private IP addresses for communication between instances in the same network
(EC2-Classic or a VPC). For more information about the standards and specifications of private IP addresses, go to RFC 1918.
When you launch an instance, we allocate a private IP address for the instance using DHCP. Each instance is also given an internal DNS hostname that resolves to the private IP
address of the instance; for example, ip-10-251-50-12.ec2.internal. You can use the internal DNS hostname for communication between instances in the same network, but we can't
resolve the DNS hostname outside the network that the instance is in.
An instance launched in a VPC is given a primary private IP address in the address range of the subnet. For more information, see Subnet Sizing in the Amazon VPC User Guide. If you
don't specify a primary private IP address when you launch the instance, we select an available IP address in the subnet's range for you. Each instance in a VPC has a default network
interface (eth0) that is assigned the primary private IP address. You can also specify additional private IP addresses, known as secondary private IP addresses. Unlike primary
private IP addresses, secondary private IP addresses can be reassigned from one instance to another. For more information, see Multiple Private IP Addresses.
For instances launched in EC2-Classic, we release the private IP address when the instance is stopped or terminated. If you restart your stopped instance, it receives a new private
IP address.
For instances launched in a VPC, a private IP address remains associated with the network interface when the instance is stopped and restarted, and is released when the instance is
terminated.
EC2-Classic : We select a single private IP address for your instance; multiple IP addresses are not supported.
VPC : You can assign multiple private IP addresses to your instance.
B can't be an answer because RDS has automatic redundancy/failover.
Question : 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 onpremise
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?
1. Send the daily backup files to Glacier immediately after being generated
2. Transfer the daily backup files to an EBS volume in AWS and take daily snapshots of the volume
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4. Host the backup files on a Storage Gateway with Gateway-Cached Volumes and take daily snapshots
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Explanation: It's C because the "appropriate bucket lifecycle policies" will only move data to Glacier after 7 days.
The 2 hour/1 hour restores are coming from S3.
Question : In order to optimize performance for a compute cluster that requires low inter-node latency,
which feature in the following list should you use?
1. AWS Direct Connect
2. Placement Groups
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4. EC2 Dedicated Instances
5. Multiple Availability Zones
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Explanation: A placement group is a logical grouping of instances within a single Availability Zone. Using placement groups enables applications to participate in a low-latency, 10 Gigabits
per second (Gbps) network. Placement groups are recommended for applications that benefit from low network latency, high network throughput, or both. To provide the lowest latency,
and the highest packet-per-second network performance for your placement group, choose an instance type that supports enhanced networking.
Related Questions
Question : You have a server with a OGB Amazon EBS data volume. The volume is % 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?
1. Take periodic snapshots of the EBS volume
2. Use a third party Incremental backup application to back up to Amazon Glacier
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4. Create another EBS volume in the second Availability Zone attach it to the Amazon EC2 instance, and use a disk manager to mirror the two disks
Question : Your company Is moving towards tracking web page users with a small tracking Image loaded on
each page Currently you are serving this image out of US-East, but are starting to get concerned
about the time It takes to load the image for users on the west coast.
What are the two best ways to speed up serving this image?
Choose 2 answers
A. Use Route 53's Latency Based Routing and serve the image out of US-West-2 as well as USEast-1
B. Serve the image out through CloudFront
C. Serve the image out of S3 so that it isn't being served oft of your web application tier
D. Use EBS PIOPs to serve the image faster out of your EC2 instances
1. A,C
2. C,D
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4. A,D
5. A,B
Question : If you want to launch Amazon Elastic Compute Cloud (EC) Instances and assign each Instance a
predetermined private IP address you should:
1. Assign a group or sequential Elastic IP address to the instances
2. Launch the instances in a Placement Group
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4. Use standard EC2 instances since each instance gets a private Domain Name Service (DNS) already
5. Launch the Instance from a private Amazon Machine image (AMI)
Question : A customer has a web application that uses cookie Based sessions to track logged in users It Is
deployed on AWS using ELB and Auto Scaling The customer observes that when load increases.
Auto Scaling launches new Instances but the load on the easting Instances does not decrease,
causing all existing users to have a sluggish experience.
Which two answer choices independently describe a behavior that could be the cause of the
sluggish user experience?
Choose 2 answers
A. ELB's normal behavior sends requests from the same user to the same backend instance
B. ELB's behavior when sticky sessions are enabled causes ELB to send requests in the same session to the same backend instance
C. A faulty browser is not honoring the TTL of the ELB DNS name.
D. The web application uses long polling such as comet or websockets. Thereby keeping a connection open to a web server for a long time
1. A,C
2. C,D
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4. B,D
5. A,B
Question : What would happen to an RDS (Relational Database Service) multi-Availability Zone deployment
of the primary DB instance fails?
1. The IP of the primary DB instance is switched to the standby DB instance
2. The RDS (Relational Database Service) DB instance reboots
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4. The canonical name record (CNAME) is changed from primary to standby
Question : How can the domain's zone apex for example "myzoneapexdomain.com" be pointed towards an Elastic Load Balancer?
1. By using an AAAA record
2. By using an A record
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4. By using an Amazon Route 53 Alias record