When thinking of DynamoDB, what are true of Local Secondary Key properties?
Correct Answer:B
Global secondary index — an index with a partition key and a sort key that can be different from those on the table. A global secondary index is considered "gIobaI" because queries on the index can span all of the data in a table, across all partitions.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Secondarylndexes.htmI
When thinking of DynamoDB, what are true of Global Secondary Key properties?
Correct Answer:A
Global secondary index — an index with a partition key and a sort key that can be different from those on the table. A global secondary index is considered "gIobaI" because queries on the index can span all of the data in a table, across all partitions.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Secondarylndexes.html
You need to grant a vendor access to your AWS account. They need to be able to read protected messages in a private S3 bucket at their leisure. They also use AWS. What is the best way to accomplish this?
Correct Answer:C
When third parties require access to your organization's AWS resources, you can use roles to delegate access to them. For example, a third party might provide a service for managing your AWS resources. With IAM roles, you can grant these third parties access to your AWS resources without sharing your AWS security credentials. Instead, the third party can access your AWS resources by assuming a role that you create in your AWS account.
Reference:
http://docs.aws.amazon.com/IAM/latest/UserGuide/id_roIes_common-scenarios_third-party.html
You run accounting software in the AWS cloud. This software needs to be online continuously during the day every day of the week, and has a very static requirement for compute resources. You also have other, unrelated batch jobs that need to run once per day at any time of your choosing. How should you minimize cost?
Correct Answer:A
Because the instance will always be online during the day, in a predictable manner, and there are a sequence of batch jobs to perform at any time, we should run the batch jobs when the account software is off. We can achieve Heavy Utilization by alternating these times, so we should purchase the reservation as such, as this represents the lowest cost. There is no such thing a "FuII" level utilization purchases on EC2.
Reference: https://d0.awsstatic.com/whitepapers/Cost_Optimization_with_AWS.pdf
Which of the following tools does not directly support AWS OpsWorks, for monitoring your stacks?
Correct Answer:A
You can monitor your stacks in the following ways: AWS OpsWorks uses Amazon CIoudWatch to provide thirteen custom metrics with detailed monitoring for each instance in the stack; AWS OpsWorks integrates with AWS CIoudTraiI to log every AWS OpsWorks API call and store the data in an Amazon S3 bucket; You can use Amazon CIoudWatch Logs to monitor your stack's system, application, and custom logs. Reference: http://docs.aws.amazon.com/opsworks/latest/userguide/monitoring.htmI
You need the absolute highest possible network performance for a cluster computing application. You already selected homogeneous instance types supporting 10 gigabit enhanced networking, made sure that your workload was network bound, and put the instances in a placement group. What is the last optimization you can make?
Correct Answer:A
For instances that are collocated inside a placement group, jumbo frames help to achieve the maximum network throughput possible, and they are recommended in this case. For more information, see Placement Groups.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/network_mtu.htm|#jumbo_frame_instances