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Q169. Your customer wishes to deploy an enterprise application to AWS which will consist of several web servers, several application servers and a small (50GB) Oracle database information is stored, both in the database and the file systems of the various servers. The backup system must support database recovery whole server and whole disk restores, and indMdual file restores with a recovery time of no more than two hours. They have chosen to use RDS Oracle as the database
Which backup architecture will meet these requirements?
A. Backup RDS using automated daily DB backups Backup the EC2 instances using AMs and
supplement with file-level backup to 53 using traditional enterprise backup software to provide fi Ie level restore
B. Backup RDS using a Multi-AZ Deployment Backup the EC2 instances using Amis, and supplement by copying file system data to 53 to provide file level restore.
C. Backup RDS using automated daily DB backups Backup the EC2 instances using EBS snapshots and supplement with file-level backups to Amazon Glacier using traditional enterprise backup software to provide file level restore
D. Backup RDS database to 53 using Oracle RMAN Backup the EC2 instances using Amis, and supplement with EBS snapshots for indMdual volume restore.
Answer: A
Explanation:
Point-In-Time Recovery
In addition to the daily automated backup, Amazon RDS archives database change logs. This enables you to recover your database to any point in time during the backup retention period, up to the last five minutes of database usage.
Amazon RDS stores multiple copies of your data, but for Single-AZ DB instances these copies are stored in a single availability zone. If for any reason a Single-AZ DB instance becomes unusable, you can use point-in-time recovery to launch a new DB instance with the latest restorable data. For more information on working with point-in-time recovery, go to Restoring a DB Instance to a Specified Time.
Note
Mu|ti-AZ deployments store copies of your data in different Availability Zones for greater levels of data durability. For more information on Multi-AZ deployments, see High Availability (MuIti-AZ).
Q170. You have been given a scope to set up an AWS Media Sharing Framework for a new start up photo
sharing company similar to flickr. The first thing that comes to mind about this is that it will obviously need a huge amount of persistent data storage for this framework. Which of the following storage options would be appropriate for persistent storage?
A. Amazon Glacier or Amazon S3
B. Amazon Glacier or AWS Import/Export
C. AWS Import/Export or Amazon C|oudFront
D. Amazon EBS volumes or Amazon S3
Answer: D
Explanation:
Persistent storage-If you need persistent virtual disk storage similar to a physical disk drive for files or other data that must persist longer than the lifetime of a single Amazon EC2 instance, Amazon EBS volumes or Amazon S3 are more appropriate.
Reference: http://media.amazonwebservices.com/AWS_Storage_Options.pdf
Q171. Your EBS volumes do not seem to be performing as expected and your team leader has requested you look into improving their performance. Which of the following is not a true statement relating to the performance of your EBS volumes?
A. Frequent snapshots provide a higher level of data durability and they will not degrade the performance of your application while the snapshot is in progress.
B. General Purpose (SSD) and Provisioned IOPS (SSD) volumes have a throughput limit of 128 MB/s per volume.
C. There is a relationship between the maximum performance of your EBS volumes, the amount of I/O you are drMng to them, and the amount of time it takes for each transaction to complete.
D. There is a 5 to 50 percent reduction in IOPS when you first access each block of data on a newly created or restored EBS volume
Answer: A
Explanation:
Several factors can affect the performance of Amazon EBS volumes, such as instance configuration, I/O characteristics, workload demand, and storage configuration.
Frequent snapshots provide a higher level of data durability, but they may slightly degrade the
performance of your application while the snapshot is in progress. This trade off becomes critical when you have data that changes rapidly. Whenever possible, plan for snapshots to occur during off-peak times in order to minimize workload impact.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSPerformance.htmI
Q172. Name the disk storage supported by Amazon Elastic Compute Cloud (EC2).
A. None of these
B. Amazon AppStream store
C. Amazon SNS store
D. Amazon Instance Store
Answer: D
Explanation:
Amazon EC2 supports the following storage options: Amazon Elastic Block Store (Amazon EBS) Amazon EC2 Instance Store Amazon Simple Storage Service (Amazon S3)
Reference: http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/Storage.html
Q173. You have been asked to build a database warehouse using Amazon Redshift. You know a little about it, including that it is a SQL data warehouse solution, and uses industry standard ODBC and JDBC connections and PostgreSQL drivers. However you are not sure about what sort of storage it uses for database tables. What sort of storage does Amazon Redshift use for database tables?
A. InnoDB Tables
B. NDB data storage
C. Columnar data storage
D. NDB CLUSTER Storage
Answer: C
Explanation:
Amazon Redshift achieves efficient storage and optimum query performance through a combination of massively parallel processing, columnar data storage, and very efficient, targeted data compression encoding schemes.
Columnar storage for database tables is an important factor in optimizing analytic query performance because it drastically reduces the overall disk I/O requirements and reduces the amount of data you need to load from disk.
Reference: http://docs.aws.amazon.com/redshift/latest/dg/c_co|umnar_storage_disk_mem_mgmnt.html
Q174. What is the Reduced Redundancy option in Amazon 53?
A. Less redundancy for a lower cost.
B. It doesn't exist in Amazon 53, but in Amazon EBS.
C. It allows you to destroy any copy of your files outside a specific jurisdiction.
D. It doesn't exist at all
Answer: A
Q175. Security groups act like a firewall at the instance level, whereas _ are an additional layer of security that act at the subnet level.
A. DB Security Groups
B. VPC Security Groups
C. network ACLs
Answer: C
Q176. In Route 53, what does a Hosted Zone refer to?
A. A hosted zone is a collection of geographical load balancing rules for Route 53.
B. A hosted zone is a collection of resource record sets hosted by Route 53.
C. A hosted zone is a selection of specific resource record sets hosted by CIoudFront for distribution to Route 53.
D. A hosted zone is the Edge Location that hosts the Route 53 records for a user.
Answer: B
Explanation:
A Hosted Zone refers to a selection of resource record sets hosted by Route 53.
Reference: http://docs.aws.amazon.com/Route53/Iatest/DeveIoperGuide/AboutHostedZones.html