Someone is creating a VPC for their application hosting. He has created two private subnets in the same availability zone and created one subnet in a separate availability zone. He wants to make a High Availability system with an internal Elastic Load Balancer.
Which choice is true regarding internal ELBs in this scenario? (Choose two.)
AC
The Amazon Virtual Private Cloud (Amazon VPC) allows the user to define a virtual networking environment in a private, isolated section of the Amazon Web
Services (AWS) cloud. The user has complete control over the virtual networking environment. Within this virtual private cloud, the user can launch AWS resources, such as elastic load balancers, and EC2 instances. There are two ELBs available with VPC: internet facing and internal (private) ELB. For internal servers, such as App servers the organization can create an internal load balancer in their VPC and then place back-end application instances behind the internal load balancer. The internal load balancer will route requests to the back-end application instances, which are also using private IP addresses and only accept requests from the internal load balancer. The Internal ELB supports only one subnet in each AZ and asks the user to select a subnet while configuring internal
ELB.
Reference:
http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/USVPC_creating_basic_lb.html
To ensure failover capabilities on an elastic network interface (ENI), what should you use for incoming traffic?
B
To ensure failover capabilities on an elastic network interface (ENI), consider using a secondary private IP for incoming traffic and if a failure occurs, you can move the interface and/or secondary private IP address to a standby instance.
Reference:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.html
An organization is setting up a highly scalable application using Elastic Beanstalk. The organization is using ELB and RDS with VPC. The organization has public and private subnets within the cloud.
Which of the below mentioned configurations will not work in this scenario?
D
The Amazon Virtual Private Cloud (Amazon VPC) allows the user to define a virtual networking environment in a private, isolated section of the Amazon Web
Services (AWS) cloud. The user has complete control over the virtual networking environment. If the organization is planning to implement a scalable secure application using RDS, VPC and ELB the organization should follow below mentioned configurations:
Setup RDS in a private subnet Setup ELB in a public subnet
Since RDS needs a subnet group, the organization should have two private subnets in the same zone
The ELB needs private and public subnet to be part of same AZs It is not required that instances should have a public IP assigned to them. The instances can be a part of a private subnet and the organization can setup a corresponding routing mechanism.
Reference:
http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/vpc-rds.html
In DynamoDB, a projection is__________.
D
In DynamoDB, a projection is the set of attributes that is copied from a table into a secondary index.
Reference:
http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/GSI.html
Which of the following is NOT true of the DynamoDB Console?
A
The DynamoDB Console lets you do the following: Create, update, and delete tables. The throughput calculator provides you with estimates of how many capacity units you will need to request based on the usage information you provide. View items stored in a tables, add, update, and delete items. Query a table. Set up alarms to monitor your table's capacity usage. View your table's top monitoring metrics on real-time graphs from CloudWatch. View alarms configured for each table and create custom alarms.html.
DynamoDB uses only as a transport protocol, not as a storage format.
D
DynamoDB uses JSON only as a transport protocol, not as a storage format. The AWS SDKs use JSON to send data to DynamoDB, and DynamoDB responds with JSON, but DynamoDB does not store data persistently in JSON format.
Reference:
http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Programming.LowLev elAPI.html
In DynamoDB, which of the following allows you to set alarms when you reach a specified threshold for a metric?
C
CloudWatch allows you to set alarms when you reach a specified threshold for a metric.
Reference:
http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/MonitoringDynamoDB.html
Is it possible to load data from Amazon DynamoDB into Amazon Redshift?
D
Yes. When you copy data from an Amazon DynamoDB table into Amazon Redshift, you can perform complex data analysis queries on that data. This includes joins with other tables in your Amazon Redshift cluster.
Reference:
http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/RedshiftforDynamoDB.html
In regard to DynamoDB, when you create a table with a hash-and-range key.
C
When you create a table with a hash-and-range key, you can optionally define one or more secondary indexes on that table. A secondary index lets you query the data in the table using an alternate key, in addition to queries against the primary key.
Reference:
http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DataModel.html
Someone has recommended a new client to you and you know he is into online gaming and you are almost certain he will want to set up an online gaming site which will require a database service that provides fast and predictable performance with seamless scalability.
Which of the following AWS databases would be best suited to an online gaming site?
B
Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. You can use Amazon
DynamoDB to create a database table that can store and retrieve any amount of data, and serve any level of request traffic. Amazon DynamoDB automatically spreads the data and traffic for the table over a sufficient number of servers to handle the request capacity specified by the customer and the amount of data stored, while maintaining consistent and fast performance.
Reference:
http://aws.amazon.com/documentation/dynamodb/
