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Q81. Amazon RDS automated backups and DB Snapshots are currently supported for only the _ _ storage engine
A. InnoDB
B. MyISAM
Answer: A
Q82. D0 the Amazon EBS volumes persist independently from the running life of an Amazon EC2 instance?
A. Only if instructed to when created
B. Yes
C. No
Answer: B
Q83. A friend wants you to set up a small BitTorrent storage area for him on Amazon S3. You tell him it is highly unlikely that AWS would allow such a thing in their infrastructure. However you decide to investigate. Which of the following statements best describes using BitTorrent with Amazon S3?
A. Amazon S3 does not support the BitTorrent protocol because it is used for pirated software.
B. You can use the BitTorrent protocol but only for objects that are less than 100 GB in size.
C. You can use the BitTorrent protocol but you need to ask AWS for specific permissions first.
D. You can use the BitTorrent protocol but only for objects that are less than 5 GB in size.
Answer: D
Explanation:
BitTorrent is an open, peer-to-peer protocol for distributing files. You can use the BitTorrent protocol to retrieve any publicly-accessible object in Amazon S3.
Amazon S3 supports the BitTorrent protocol so that developers can save costs when distributing content at high scale. Amazon S3 is useful for simple, reliable storage of any data. The default distribution mechanism for Amazon S3 data is via client/server download. In client/server distribution, the entire object is transferred point-to-point from Amazon S3 to every authorized user who requests that object. While client/server delivery is appropriate for a wide variety of use cases, it is not optimal for everybody. Specifically, the costs of client/server distribution increase linearly as the number of users downloading objects increases. This can make it expensive to distribute popular objects.
BitTorrent addresses this problem by recruiting the very clients that are downloading the object as distributors themselves: Each client downloads some pieces of the object from Amazon S3 and some from other clients, while simultaneously uploading pieces of the same object to other interested "peers." The benefit for publishers is that for large, popular files the amount of data actually supplied by Amazon S3 can be substantially lower than what it would have been sewing the same clients via client/server download. Less data transferred means lower costs for the publisher of the object.
Reference: http://docs.aws.amazon.com/AmazonS3/latest/dev/S3Torrent.html
Q84. A customer has established an AWS Direct Connect connection to AWS. The link is up and routes are being advertised from the customer's end, however the customer is unable to connect from EC2 instances inside its VPC to servers residing in its datacenter.
Which of the following options provide a viable solution to remedy this situation? (Choose 2 answers)
A. Add a route to the route table with an IPsec VPN connection as the target.
B. Enable route propagation to the virtual pinnate gateway (VGW).
C. Enable route propagation to the customer gateway (CGW).
D. Modify the route table of all Instances using the 'route' command.
E. Modify the Instances VPC subnet route table by adding a route back to the customer's on-premises environment.
Answer: A, C
Q85. While creating an Amazon RDS DB, your first task is to set up a DB that controls which IP address or EC2 instance can access your DB Instance.
A. security token pool
B. security token
C. security pool
D. security group
Answer: D
Explanation:
While creating an Amazon RDS DB, your first task is to set up a DB Security Group that controls what IP addresses or EC2 instances have access to your DB Instance.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithSecurityGroups.html
Q86. Select the incorrect statement
A. In Amazon EC2, the private IP addresses only returned to Amazon EC2 when the instance is stopped or terminated
B. In Amazon VPC, an instance retains its private IP addresses when the instance is stopped.
C. In Amazon VPC, an instance does NOT retain its private IP addresses when the instance is stopped.
D. In Amazon EC2, the private IP address is associated exclusive ly with the instance for its lifetime
Answer: C
Q87. You are in the process of building an online gaming site for a client and one of the requirements is that it must be able to process vast amounts of data easily. Which AWS Service would be very helpful in processing all this data?
A. Amazon S3
B. AWS Data Pipeline
C. AWS Direct Connect
D. Amazon EMR
Answer: D
Explanation:
Managing and analyzing high data volumes produced by online games platforms can be difficult. The back-end infrastructures of online games can be challenging to maintain and operate. Peak usage periods, multiple players, and high volumes of write operations are some of the most common problems that operations teams face.
Amazon Elastic MapReduce (Amazon EMR) is a service that processes vast amounts of data easily. Input data can be retrieved from web server logs stored on Amazon S3 or from player data stored in Amazon DynamoDB tables to run analytics on player behavior, usage patterns, etc. Those results can be stored again on Amazon S3, or inserted in a relational database for further analysis with classic business intelligence tools.
Reference: http://media.amazonwebservices.com/architecturecenter/AWS_ac_ra_games_10.pdf
Q88. You have three Amazon EC2 instances with Elastic IP addresses in the US East (Virginia) region, and you want to distribute requests across all three IPs evenly for users for whom US East (Virginia) is the appropriate region.
How many EC2 instances would be sufficient to distribute requests in other regions?
A. 3
B. 9
C. 2
D. 1
Answer: D
Explanation:
If your application is running on Amazon EC2 instances in two or more Amazon EC2 regions, and if you have more than one Amazon EC2 instance in one or more regions, you can use latency-based routing to route traffic to the correct region and then use weighted resource record sets to route traffic to instances within the region based on weights that you specify.
For example, suppose you have three Amazon EC2 instances with Elastic IP addresses in the US East (Virginia) region and you want to distribute requests across all three IPs evenly for users for whom US East (Virginia) is the appropriate region. Just one Amazon EC2 instance is sufficient in the other regions, although you can apply the same technique to many regions at once.
Reference: http://docs.aws.amazon.com/Route53/Iatest/DeveIoperGuide/Tutorials.html
Q89. When controlling access to Amazon EC2 resources, each Amazon EBS Snapshot has a attribute that controls which AWS accounts can use the snapshot.
A. createVoIumePermission
B. LaunchPermission
C. SharePermission
D. RequestPermission
Answer: A
Explanation:
Each Amazon EBS Snapshot has a createVoIumePermission attribute that you can set to one or more AWS Account IDs to share the AM with those AWS Accounts. To allow several AWS Accounts to use a particular EBS snapshot, you can use the snapshots's createVoIumePermission attribute to include a list of the accounts that can use it.
Reference: http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/UsingIAM.html
Q90. If I modify a DB Instance or the DB parameter group associated with the instance, should I reboot the instance for the changes to take effect?
A. No
B. Yes
Answer: B