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Q151. A major finance organisation has engaged your company to set up a large data mining application. Using AWS you decide the best service for this is Amazon Elastic MapReduce(EMR) which you know uses Hadoop. Which of the following statements best describes Hadoop?
A. Hadoop is 3rd Party software which can be installed using AMI
B. Hadoop is an open source python web framework
C. Hadoop is an open source Java software framework
D. Hadoop is an open source javascript framework
Answer: C
Explanation:
Amazon EMR uses Apache Hadoop as its distributed data processing engine.
Hadoop is an open source, Java software framework that supports data-intensive distributed applications running on large clusters of commodity hardware. Hadoop implements a programming model named "MapReduce," where the data is dMded into many small fragments of work, each of which may be executed on any node in the cluster.
This framework has been widely used by developers, enterprises and startups and has proven to be a reliable software platform for processing up to petabytes of data on clusters of thousands of commodity machines.
Reference: http://aws.amazon.com/elasticmapreduce/faqs/
Q152. Do Amazon EBS volumes persist independently from the running life of an Amazon EC2 instance?
A. Yes, they do but only if they are detached from the instance.
B. No, you cannot attach EBS volumes to an instance.
C. No, they are dependent.
D. Yes, they do.
Answer: D
Explanation:
An Amazon EBS volume behaves like a raw, unformatted, external block device that you can attach to a
single instance. The volume persists independently from the running life of an Amazon EC2 instance. Reference: http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/Storage.html
Q153. You are implementing a URL whitelisting system for a company that wants to restrict outbound HTTP'S connections to specific domains from their EC2-hosted applications you deploy a single EC2 instance running proxy software and configure It to accept traffic from all subnets and EC2 instances in the VPC. You configure the proxy to only pass through traffic to domains that you define in its whitelist configuration You have a nightly maintenance window or 10 minutes where all instances fetch new software updates. Each update Is about 200MB In size and there are 500 instances In the VPC that routinely fetch updates After a few days you notice that some machines are failing to successfully download some, but not all of their updates within the maintenance window. The download URLs used for these updates are correctly listed in the proxy's whitelist configuration and you are able to access them manually using a web browser on the instances. What might be happening? {Choose 2 answers)
A. You are running the proxy on an undersized EC2 instance type so network throughput is not sufficient for all instances to download their updates in time.
B. You are running the proxy on a sufficiently-sized EC2 instance in a private subnet and its network throughput is being throttled by a NAT running on an undersized EC2 instance.
C. The route table for the subnets containing the affected EC2 instances is not configured to direct network traffic for the software update locations to the proxy.
D. You have not allocated enough storage to t he EC2 instance running the proxy so the network buffer is filling up, causing some requests to fail.
E. You are running the proxy in a public subnet but have not allocated enough EIPs to support the needed network throughput through the Internet Gateway {IGW).
Answer: A, B
Q154. You've created your first load balancer and have registered your EC2 instances with the load balancer. Elastic Load Balancing routinely performs health checks on all the registered EC2 instances and automatically distributes all incoming requests to the DNS name of your load balancer across your registered, healthy EC2 instances. By default, the load balancer uses the _ protocol for checking the health of your instances.
A. HTTPS
B. HTTP
C. ICMP
D. IPv6
Answer: B
Explanation:
In Elastic Load Balancing a health configuration uses information such as protocol, ping port, ping path (URL), response timeout period, and health check interval to determine the health state of the instances registered with the load balancer.
Currently, HTTP on port 80 is the default health check. Reference:
http://docs.aws.amazon.com/E|asticLoadBaIancing/latest/DeveIoperGuide/TerminoIogyandKeyConcepts. html
Q155. Do you need to shutdown your EC2 instance when you create a snapshot of EBS volumes that serve as root devices?
A. No, you only need to shutdown an instance before deleting it.
B. Yes
C. No, the snapshot would turn off your instance automatically.
D. No
Answer: B
Explanation:
Yes, to create a snapshot for Amazon EBS volumes that serve as root devices, you should stop the instance before taking the snapshot.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-creating-snapshot.html
Q156. Amazon RDS automated backups and DB Snapshots are currently supported for only the _ _ storage engine
A. MyISAM
B. InnoDB
Answer: B
Q157. What does Amazon Elastic Beanstalk provide?
A. A scalable storage appliance on top of Amazon Web Services.
B. An application container on top of Amazon Web Services.
C. A service by this name doesn't exist.
D. A scalable cluster of EC2 instances.
Answer: B
Q158. Does Amazon RDS allow direct host access via Telnet, Secure Shell (SSH), or Windows Remote Desktop Connection?
A. Yes
B. No
C. Depends on if it is in VPC or not
Answer: B
Q159. To view information about an Amazon EBS volume, open the Amazon EC2 console at https://console.aws.amazon.com/ec2/, click in the Navigation pane.
A. EBS
B. Describe
C. Details
D. Volumes
Answer: D
Q160. After deciding that EMR will be useful in analysing vast amounts of data for a gaming website that you are architecting you have just deployed an Amazon EMR Cluster and wish to monitor the cluster performance. Which of the following tools cannot be used to monitor the cluster performance?
A. Kinesis
B. Ganglia
C. C|oudWatch Metrics
D. Hadoop Web Interfaces
Answer: A
Explanation:
Amazon EMR provides several tools to monitor the performance of your cluster. Hadoop Web Interfaces
Every cluster publishes a set of web interfaces on the master node that contain information about the cluster. You can access these web pages by using an SSH tunnel to connect them on the master node. For more information, see View Web Interfaces Hosted on Amazon EMR Clusters.
CIoudWatch Metrics
Every cluster reports metrics to CIoudWatch. CIoudWatch is a web service that tracks metrics, and which you can use to set alarms on those metrics. For more information, see Monitor Metrics with CIoudWatch. Ganglia
Ganglia is a cluster monitoring tool. To have this available, you have to install Ganglia on the cluster when you launch it. After you've done so, you can monitor the cluster as it runs by using an SSH tunnel to connect to the Ganglia UI running on the master node. For more information, see Monitor Performance with Ganglia.
Reference:
http://docs.aws.amazon.com/EIasticMapReduce/latest/DeveIoperGuide/emr-troubleshoot-tooIs.htmI