AWS-Solution-Architect-Associate Exam
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Q181. You have a lot of data stored in the AWS Storage Gateway and your manager has come to you asking about how the billing is calculated, specifically the Virtual Tape Shelf usage. What would be a correct response to this?
A. You are billed for the virtual tape data you store in Amazon Glacier and are billed for the size of the virtual tape.
B. You are billed for the virtual tape data you store in Amazon Glacier and billed for the portion of virtual tape capacity that you use, not for the size of the virtual tape.
C. You are billed for the virtual tape data you store in Amazon S3 and billed for the portion of virtual tape capacity that you use, not for the size of the virtual tape.
D. You are billed for the virtual tape data you store in Amazon S3 and are billed for the size of the virtual tape.
Answer: B
Explanation:
The AWS Storage Gateway is a service connecting an on-premises software appliance with cloud-based storage to provide seamless and secure integration between an organization’s on-premises IT environment and AWS’s storage infrastructure.
AWS Storage Gateway billing is as follows. Volume storage usage (per GB per month):
You are billed for the Cached volume data you store in Amazon S3. You are only billed for volume capacity you use, not for the size of the volume you create.
Snapshot Storage usage (per GB per month): You are billed for the snapshots your gateway stores in Amazon S3. These snapshots are stored and billed as Amazon EBS snapshots. Snapshots are incremental backups, reducing your storage charges. When taking a new snapshot, only the data that has changed since your last snapshot is stored.
Virtual Tape Library usage (per GB per month):
You are billed for the virtual tape data you store in Amazon S3. You are only billed for the portion of virtual tape capacity that you use, not for the size of the virtual tape.
Virtual Tape Shelf usage (per GB per month):
You are billed for the virtual tape data you store in Amazon Glacier. You are only billed for the portion of virtual tape capacity that you use, not for the size of the virtual tape.
Reference: https://aws.amazon.com/storagegateway/faqs/
Q182. A read only news reporting site with a combined web and application tier and a database tier that receives large and unpredictable traffic demands must be able to respond to these traffic fluctuations automatically. What AWS services should be used meet these requirements?
A. Stateless instances for the web and application tier synchronized using Elasticache Memcached in an autoscaimg group monitored with CIoudWatch. And RDSwith read replicas.
B. Stateful instances for the web and application tier in an autoscaling group monitored with CIoudWatch and RDS with read replicas.
C. Stateful instances for the web and application tier in an autoscaling group monitored with CIoudWatch. And multi-AZ RDS.
D. Stateless instances for the web and application tier synchronized using EIastiCache Memcached in an autoscaling group monitored with CIoudWatch and multi-AZ RDS.
Answer: A
Q183. Amazon Elastic Load Balancing is used to manage traffic on a fileet of Amazon EC2 instances, distributing traffic to instances across all availability zones within a region. Elastic Load Balancing has all the advantages of an on-premises load balancer, plus several security benefits.
Which of the following is not an advantage of ELB over an on-premise load balancer?
A. ELB uses a four-tier, key-based architecture for encryption.
B. ELB offers clients a single point of contact, and can also serve as the first line of defense against attacks on your network.
C. ELB takes over the encryption and decryption work from the Amazon EC2 instances and manages it centrally on the load balancer.
D. ELB supports end-to-end traffic encryption using TLS (previously SSL) on those networks that use secure HTTP (HTTPS) connections.
Answer: A
Explanation:
Amazon Elastic Load Balancing is used to manage traffic on a fileet of Amazon EC2 instances, distributing traffic to instances across all availability zones within a region. Elastic Load Balancing has all the advantages of an on-premises load balancer, plus several security benefits:
Takes over the encryption and decryption work from the Amazon EC2 instances and manages it centrally on the load balancer
Offers clients a single point of contact, and can also serve as the first line of defense against attacks on your network
When used in an Amazon VPC, supports creation and management of security groups associated with your Elastic Load Balancing to provide additional networking and security options
Supports end-to-end traffic encryption using TLS (previously SSL) on those networks that use secure HTTP (HTTPS) connections. When TLS is used, the TLS server certificate used to terminate client connections can be managed centrally on the load balancer, rather than on every indMdual instance. Reference: http://d0.awsstatic.com/whitepapers/Security/AWS%20Security%20Whitepaper.pdf
Q184. You are running a successful multitier web application on AWS and your marketing department has asked you to add a reporting tier to the application. The reporting tier will aggregate and publish status reports every 30 minutes from user-generated information that is being stored in your web application s database. You are currently running a MuIti-AZ RDS MySQL instance for the database tier. You also have implemented Elasticache as a database caching layer between the application tier and database tier. Please select the answer that will allow you to successful ly implement the reporting tier with as little impact as possible to your database.
A. Continually send transaction logs from your master database to an 53 bucket and generate the reports off the 53 bucket using 53 byte range request s.
B. Generate the reports by querying the synchronously replicated standby RDS MySQL instance maintained through Multi-AZ.
C. Launch a RDS Read Replica connected to your MuIti AZ master database and generate reports by querying the Read Replica.
D. Generate the reports by querying the EIastiCache database caching tier.
Answer: C
Explanation:
Amazon RDS allows you to use read replicas with MuIti-AZ deployments. In Multi-AZ deployments for MySQL, Oracle, SQL Server, and PostgreSQL, the data in your primary DB Instance is synchronously replicated to a standby instance in a different Availability Zone (AZ). Because of their synchronous replication, MuIti-AZ deployments for these engines offer greater data durability benefits than do read replicas. (In all Amazon RDS for Aurora deployments, your data is automatically replicated across 3 Availability Zones.)
You can use MuIti-AZ deployments and read replicas in conjunction to enjoy the complementary benefits of each. You can simply specify that a given Multi-AZ deployment is the source DB Instance for your Read replicas. That way you gain both the data durability and availability benefits of Multi -AZ deployments and the read scaling benefits of read replicas.
Note that for MuIti-AZ deployments, you have the option to create your read replica in an AZ other than that of the primary and the standby for even more redundancy. You can identify the AZ corresponding to your standby by looking at the "Secondary Zone" field of your DB Instance in the AWS Management Console.
Q185. You are setting up your first Amazon Virtual Private Cloud (Amazon VPC) network so you decide you should probably use the AWS Management Console and the VPC Wizard. Which of the following is not an option for network architectures after launching the "Start VPC Wizard" in Amazon VPC page on the AWS Management Console?
A. VPC with a Single Public Subnet Only
B. VPC with a Public Subnet Only and Hardware VPN Access
C. VPC with Public and Private Subnets and Hardware VPN Access
D. VPC with a Private Subnet Only and Hardware VPN Access
Answer: B
Explanation:
Amazon VPC enables you to build a virtual network in the AWS cloud - no VPNs, hardware, or physical datacenters required.
Your AWS resources are automatically provisioned in a ready-to-use default VPC. You can choose to create additional VPCs by going to Amazon VPC page on the AWS Management Console and click on the "Start VPC Wizard" button.
You’II be presented with four basic options for network architectures. After selecting an option, you can modify the size and IP address range of the VPC and its subnets. If you select an option with Hardware VPN Access, you will need to specify the IP address of the VPN hardware on your network. You can modify the VPC to add more subnets or add or remove gateways at any time after the VPC has been created.
The four options are:
VPC with a Single Public Subnet Only VPC with Public and Private Subnets
VPC with Public and Private Subnets and Hardware VPN Access VPC with a Private Subnet Only and Hardware VPN Access Reference: https://aws.amazon.com/vpc/faqs/
Q186. Which of the following AWS CLI commands is syntactically incorrect?
1. $ aws ec2 describe-instances
2. $ aws ec2 start-instances --instance-ids i-1348636c
3. $ aws sns publish --topic-arn arn:aws:sns:us-east-1:546419318123:OperationsError -message "Script Failure"
4. $ aws sqs receive-message --queue-urI https://queue.amazonaws.com/546419318123/Test
A. 3
B. 4
C. 2
D. 1
Answer: A
Explanation:
The following CLI command is missing a hyphen before "-message".
aws sns publish --topic-arn arn:aws:sns:us-east-1:546419318123:OperationsError -message "Script Failure"
It has been added below in red
aws sns publish --topic-arn arn:aws:sns:us-east-1:546419318123:OperationsError ---message "Script Failure"
Reference: http://aws.amazon.com/c|i/
Q187. Your company plans to host a large donation website on Amazon Web Services (AWS). You anticipate a large and undetermined amount of traffic that will create many database writes. To be certain that you do not drop any writes to a database hosted on AWS. Which service should you use?
A. Amazon RDS with provisioned IOPS up to the anticipated peak write throughput.
B. Amazon Simple Queue Service (SOS) for capturing the writes and draining the queue to write to the database.
C. Amazon EIastiCache to store the writes until the writes are committed to the database.
D. Amazon DynamoDB with provisioned write throughput up to the anticipated peak write throughput.
Answer: B
Explanation:
Amazon Simple Queue Service (Amazon SQS) offers a reliable, highly scalable hosted queue for storing messages as they travel between computers. By using Amazon SQS, developers can simply move data between distributed application components performing different tasks, without losing messages or requiring each component to be always available. Amazon SQS makes it easy to build a distributed, decoupled application, working in close conjunction with the Amazon Elastic Compute Cloud (Amazon EC2) and the other AWS infrastructure web services.
What can I do with Amazon SQS?
Amazon SQS is a web service that gives you access to a message queue that can be used to store messages while waiting for a computer to process them. This allows you to quickly build message queuing applications that can be run on any computer on the internet. Since Amazon SQS is highly scalable and you only pay for what you use, you can start small and grow your application as you wish, with no compromise on performance or reliability. This lets you focus on building sophisticated message-based applications, without worrying about how the messages are stored and managed.
You can use Amazon SQS with software applications in various ways. For example, you can: Integrate Amazon SQS with other AWS infrastructure web services to make applications more reliable and filexible.
Use Amazon SQS to create a queue of work where each message is a task that needs to be completed by a process. One or many computers can read tasks from the queue and perform them. Build a microservices architecture, using queues to connect your microservices.
Keep notifications of significant events in a business process in an Amazon SQS queue. Each event can have a corresponding message in a queue, and applications that need to be aware of the event can read and process the messages.
Q188. A client needs you to import some existing infrastructure from a dedicated hosting provider to AWS to try and save on the cost of running his current website. He also needs an automated process that manages backups, software patching, automatic failure detection, and recovery. You are aware that his existing set up currently uses an Oracle database. Which of the following AWS databases would be best for accomplishing this task?
A. Amazon RDS
B. Amazon Redshift
C. Amazon SimpIeDB
D. Amazon EIastiCache
Answer: A
Explanation:
Amazon RDS gives you access to the capabilities of a familiar MySQL, Oracle, SQL Server, or PostgreSQL database engine. This means that the code, applications, and tools you already use today with your existing databases can be used with Amazon RDS. Amazon RDS automatically patches the database software and backs up your database, storing the backups for a user-defined retention period and enabling point-in-time recovery.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Welcome.html
Q189. What happens to the data on an instance if the instance reboots (intentionally or unintentionally)?
A. Data will be lost
B. Data persists
C. Data may persist however cannot be sure
Answer: B
Q190. What is an isolated database environment running in the cloud (Amazon RDS) called?
A. DB Instance
B. DB Sewer
C. DB Unit
D. DB Volume
Answer: A