AWS-Solution-Architect-Associate Exam
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Q211. Which of the following features are provided by Amazon EC2?
A. Exadata Database Machine, Optimized Storage Management, Flashback Technology, and Data Warehousing
B. Instances, Amazon Machine Images (AMIs), Key Pairs, Amazon EBS Volumes, Firewall, Elastic IP address, Tags, and Virtual Private Clouds (VPCs)
C. Real Application Clusters (RAC), Elasticache Machine Images (EMIs), Data Warehousing, Flashback Technology, Dynamic IP address
D. Exadata Database Machine, Real Application Clusters (RAC), Data Guard, Table and Index Partitioning, and Data Pump Compression
Answer: B
Explanation:
Amazon EC2 provides the following features:
· Virtual computing environments, known as instances;
· Pre-configured templates for your instances, known as Amazon Nlachine Images (AMIs), that package the bits you need for your server (including the operating system and additional software)
· Various configurations of CPU, memory, storage, and networking capacity for your instances, known as instance types
· Secure login information for your instances using key pairs (AWS stores the public key, and you store the private key in a secure place)
· Storage volumes for temporary data that's deleted when you stop or terminate your instance, known as instance store volumes
· Persistent storage volumes for your data using Amazon Elastic Block Store (Amazon EBS), known as Amazon EBS volumes
· MuItipIe physical locations for your resources, such as instances and Amazon EBS volumes, known as regions and Availability Zones
· A firewall that enables you to specify the protocols, ports, and source IP ranges that can reach your instances using security groups
· Static IP addresses for dynamic cloud computing, known as Elastic IP addresses
· Metadata, known as tags, that you can create and assign to your Amazon EC2 resources
· Virtual networks you can create that are logically isolated from the rest of the AWS cloud, and that you can optionally connect to your own network, known as virtual private clouds (VPCs).
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/concepts.html
Q212. A large real -estate brokerage is exploring the option o( adding a cost-effective location based alert to their existing mobile application The application backend infrastructure currently runs on AWS Users who opt in to this service will receive alerts on their mobile device regarding real-estate otters in proximity to their location. For the alerts to be relevant delivery time needs to be in the low minute count the existing mobile app has 5 million users across the us Which one of the following architectural suggestions would you make to the customer?
A. The mobile application will submit its location to a web service endpoint utilizing Elastic Load Balancing and EC2 instances: DynamoDB will be used to store and retrieve relevant otters EC2 instances will communicate with mobile earners/device providers to push alerts back to mobile application.
B. Use AWS DirectConnect or VPN to establish connectMty with mobile carriers EC2 instances will receive the mobile applications ' location through carrier connection: ROS will be used to store and relevant relevant offers EC2 instances will communicate with mobile carriers to push alerts back to the mobile application
C. The mobile application will send device location using SOS. EC2 instances will retrieve the re Ievant others from DynamoDB AWS MobiIe Push will be used to send offers to the mobile application
D. The mobile application will send device location using AWS Nlobile Push EC2 instances will retrieve the relevant offers from DynamoDB EC2 instances will communicate with mobile carriers/device providers to push alerts back to the mobile application.
Answer: A
Q213. An organization has a statutory requirement to protect the data at rest for data stored in EBS volumes. Which of the below mentioned options can the organization use to achieve data protection?
A. Data replication.
B. Data encryption.
C. Data snapshot.
D. All the options listed here.
Answer: D
Explanation:
For protecting the Amazon EBS data at REST, the user can use options, such as Data Encryption (Windows / Linux / third party based), Data Replication (AWS internally replicates data for redundancy),
and Data Snapshot (for point in time backup).
Reference: http://media.amazonwebservices.com/AWS_Security_Best_Practices.pdf
Q214. A scope has been handed to you to set up a super fast gaming server and you decide that you will use Amazon DynamoDB as your database. For efficient access to data in a table, Amazon DynamoDB creates and maintains indexes for the primary key attributes. A secondary index is a data structure that contains a subset of attributes from a table, along with an alternate key to support Query operations. How many types of secondary indexes does DynamoDB support?
A. 2
B. 16
C. 4
D. As many as you need.
Answer: A
Explanation:
DynamoDB supports two types of secondary indexes:
Local secondary index — an index that has the same hash key as the table, but a different range key. A local secondary index is "IocaI" in the sense that every partition of a local secondary index is scoped to a table partition that has the same hash key.
Global secondary index — an index with a hash and range 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
Q215. Your company hosts a social media site supporting users in multiple countries. You have been asked to provide a highly available design tor the application that leverages multiple regions tor the most recently accessed content and latency sensitive portions of the wet) site The most latency sensitive component of the application involves reading user preferences to support web site personalization and ad selection. In addition to running your application in multiple regions, which option will support this app|ication's requirements?
A. Serve user content from 53. CIoudFront and use Route53 latency-based routing between ELBs in each region Retrieve user preferences from a local DynamoDB table in each region and leverage SQS to capture changes to user preferences with 505 workers for propagating updates to each table.
B. Use the 53 Copy API to copy recently accessed content to multiple regions and serve user content from 53. C|oudFront with dynamic content and an ELB in each region Retrieve user preferences from an EIasticCache cluster in each region and leverage SNS notifications to propagate user preference changes to a worker node in each region.
C. Use the 53 Copy API to copy recently accessed content to multiple regions and serve user content from 53 CIoudFront and Route53 latency-based routing Between ELBs In each region Retrieve user preferences from a DynamoDB table and leverage SQS to capture changes to user preferences with 505 workers for propagating DynamoDB updates.
D. Serve user content from 53. CIoudFront with dynamic content, and an ELB in each region Retrieve user preferences from an EIastiCache cluster in each region and leverage Simple Workflow (SWF) to manage the propagation of user preferences from a centralized OB to each EIastiCache cluster.
Answer: A
Q216. What is the minimum charge for the data transferred between Amazon RDS and Amazon EC2 Instances in the same Availability Zone?
A. USD 0.10 per GB
B. No charge. It is free.
C. USD 0.02 per GB
D. USD 0.01 per GB
Answer: B
Q217. A government client needs you to set up secure cryptographic key storage for some of their extremely confidential data. You decide that the AWS CIoudHSM is the best service for this. However, there seem to be a few pre-requisites before this can happen, one of those being a security group that has certain ports open. Which of the following is correct in regards to those security groups?
A. A security group that has port 22 (for SSH) or port 3389 (for RDP) open to your network.
B. A security group that has no ports open to your network.
C. A security group that has only port 3389 (for RDP) open to your network.
D. A security group that has only port 22 (for SSH) open to your network.
Answer: A
Explanation:
AWS CIoudHSM provides secure cryptographic key storage to customers by making hardware security modules (HSMs) available in the AWS cloud.
AWS C|oudHSM requires the following environment before an HSM appliance can be provisioned. A virtual private cloud (VPC) in the region where you want the AWS CIoudHSM service.
One private subnet (a subnet with no Internet gateway) in the VPC. The HSM appliance is provisioned into this subnet.
One public subnet (a subnet with an Internet gateway attached). The control instances are attached to this subnet.
An AWS Identity and Access Management (IAM) role that delegates access to your AWS resources to AWS CIoudHSM.
An EC2 instance, in the same VPC as the HSM appliance, that has the SafeNet client software installed. This instance is referred to as the control instance and is used to connect to and manage the HSM appliance.
A security group that has port 22 (for SSH) or port 3389 (for RDP) open to your network. This security group is attached to your control instances so you can access them remotely.
Q218. Fill in the blanks: The base URI for all requests for instance metadata is _ _
A. http://254.169.169.254/Iatest/
B. http://169.169.254.254/|atesU
C. http://127.0.0.1/|atest/
D. http://I69.254.169.254/|atest/
Answer: D
Q219. After you recommend Amazon Redshift to a client as an alternative solution to paying data warehouses to analyze his data, your client asks you to explain why you are recommending Redshift. Which of the following would be a reasonable response to his request?
A. It has high performance at scale as data and query complexity grows.
B. It prevents reporting and analytic processing from interfering with the performance of OLTP workloads.
C. You don't have the administrative burden of running your own data warehouse and dealing with setup, durability, monitoring, scaling, and patching.
D. All answers listed are a reasonable response to his QUESTION
Answer: D
Explanation:
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.
AWS recommends Amazon Redshift for customers who have a combination of needs, such as: High performance at scale as data and query complexity grows
Desire to prevent reporting and analytic processing from interfering with the performance of OLTP workloads
Large volumes of structured data to persist and query using standard SQL and existing BI tools Desire to the administrative burden of running one's own data warehouse and dealing with setup, durability, monitoring, scaling and patching
Reference: https://aws.amazon.com/running_databases/#redshift_anchor
Q220. You are developing a new mobile application and are considering storing user preferences in AWS.2w This would provide a more uniform cross-device experience to users using multiple mobile devices to access the application. The preference data for each user is estimated to be SOKB in size Additionally 5 million customers are expected to use the application on a regular basis. The solution needs to be
cost-effective, highly available, scalable and secure, how would you design a solution to meet the above requirements?
A. Setup an RDS MySQL instance in 2 availability zones to store the user preference data. Deploy a public facing application on a server in front of the database to manage security and access credentials
B. Setup a DynamoDB table with an item for each user having the necessary attributes to hold the user preferences. The mobile application will query the user preferences directly from the DynamoDB table. Utilize STS. Web Identity Federation, and DynamoDB Fine Grained Access Control to authenticate and authorize access.
C. Setup an RDS MySQL instance with multiple read replicas in 2 availability zones to store the user preference data .The mobile application will query the user preferences from the read replicas. Leverage the MySQL user management and access prMlege system to manage security and access credentials.
D. Store the user preference data in 53 Setup a DynamoDB table with an item for each user and an item attribute pointing to the user' 53 object. The mobile application will retrieve the 53 URL from DynamoDB and then access the 53 object directly utilize STS, Web identity Federation, and 53 ACLs to authenticate and authorize access.
Answer: B