What is the network performance offered by the c4.8xIarge instance in Amazon EC2?
Correct Answer:B
Networking performance offered by the c4.8xIarge instance is 10 Gigabit. Reference: http://aws.amazon.com/ec2/instance-types/
A user is running a webserver on EC2. The user wants to receive the SMS when the EC2 instance utilization is above the threshold limit. Which AWS services should the user configure in this case?
Correct Answer:B
Amazon SNS makes it simple and cost-effective to push to mobile devices, such as iPhone, iPad, Android, Kindle Fire, and internet connected smart devices, as well as pushing to other distributed services. In this case, the user can configure that Cloudwatch sends an alarm on when the threshold is crossed to SNS which will trigger an SMS.
Reference: http://aws.amazon.com/sns/
In the most recent company meeting, your CEO focused on the fact that everyone in the organization needs to make sure that all of the infrastructure that is built is truly scalable. Which of the following statements is incorrect in reference to scalable architecture?
Correct Answer:C
In AWS it is critical to build a scalable architecture in order to take advantage of a scalable infrastructure. The cloud is designed to provide conceptually infinite scalability. However, you cannot leverage all that scalability in infrastructure if your architecture is not scalable. Both have to work together. You will have to identify the monolithic components and bottlenecks in your architecture, identify the areas where you cannot leverage the on-demand provisioning capabilities in your architecture, and work to refactor your application, in order to leverage the scalable infrastructure and take advantage of the cloud.
Characteristics of a truly scalable application:
Increasing resources results in a proportional increase in performance A scalable service is capable of handling heterogeneity
A scalable service is operationally efficient A scalable service is resilient
A scalable service should become more cost effective when it grows (Cost per unit reduces as the number of units increases)
Reference: http://media.amazonwebservices.com/AWS_CIoud_Best_Practices.pdf
You have just been given a scope for a new client who has an enormous amount of data(petabytes) that he constantly needs analysed. Currently he is paying a huge amount of money for a data warehousing company to do this for him and is wondering if AWS can provide a cheaper solution. Do you think AWS has a solution for this?
Correct Answer:C
Amazon Redshift is a fast, fully managed, petabyte-scale data warehouse service that makes it simple and cost-effective to efficiently analyze all your data using your existing business intelligence tools. You can start small for just $0.25 per hour with no commitments or upfront costs and scale to a petabyte or more for $1,000 per terabyte per year, less than a tenth of most other data warehousing solutions. Amazon Redshift delivers fast query performance by using columnar storage technology to improve I/O efficiency and parallelizing queries across multiple nodes. Redshift uses standard PostgreSQL JDBC and ODBC drivers, allowing you to use a wide range of familiar SQL clients. Data load speed scales linearly with cluster size, with integrations to Amazon S3, Amazon DynamoDB, Amazon Elastic MapReduce, Amazon Kinesis or any SSH-enabled host.
Reference: https://aws.amazon.com/running_databases/#redshift_anchor
You are trying to launch an EC2 instance, however the instance seems to go into a terminated status immediately. What would probably not be a reason that this is happening?
Correct Answer:C
Amazon EC2 provides a virtual computing environments, known as an instance.
After you launch an instance, AWS recommends that you check its status to confirm that it goes from the pending status to the running status, the not terminated status.
The following are a few reasons why an Amazon EBS-backed instance might immediately terminate: You've reached your volume limit.
The AM is missing a required part. The snapshot is corrupt. Reference:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/Using_|nstanceStraightToTerminated.html