AWS Certified Solutions Architect – Associate Questions and Answers (Dumps and Practice Questions)
Question : You are going to create an Amazon Relational Database Services (RDS) for your production applications, and for that you require fast and
consistent I/O performance. is it the right choice to use Provisioned IOPS on RDS instances which are launched under a VPC ?
1. No, Provisioned IOPS are not for RDS
2. Yes, Provisioned IOPS can be used for all RDS instances
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4. Yes, Provisioned IOPS can be used, but with Oracle based instances
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Explanation:
For any production application that requires fast and consistent I/O performance, we recommend Provisioned IOPS (input/output operations per second)
storage. Provisioned IOPS storage is a storage option that delivers fast, predictable,and consistent throughput performance. When you create a DB instance,
you specify an IOPS rate and storage space allocation. Amazon RDS provisions that IOPS rate and storage for the lifetime of the DB instance or until you
change it. Provisioned IOPS storage is optimized for I/O intensive, online transaction processing (OLTP) workloads that have consistent performance requirements.
A virtual private cloud is a virtual network that is logically isolated from other virtual networks in the AWS cloud.
Amazon Virtual Private Cloud (VPC) lets you launch AWS resources, such as an Amazon RDS or Amazon EC2 instance, into a VPC.
The VPC can either be a default VPC that comes with your account or it could be one that you create. All VPCs are associated with your AWS account.
IOPS is available for all your RDS instances it is not depend on which database engine or their deployment strategy (either inside VPC or outside VPC).
You can provision a MySQL, PostgreSQL, or Oracle DB instance with up to 30,000 IOPS and 3 TB of allocated storage.
You can provision a SQL Server DB instance with up to 10,000 IOPS and 1 TB of allocated storage.
Question : When an object is lost under RRS, then which event is triggered ?
1. ReducedRedundancyLostObject
2. NotifyReducedRedundancyLostObject
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4. ReducedRedundancyLostObjectNotification
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Explanation: PUT Bucket notification
This implementation of the PUT operation uses the notification subresource to enable notifications of specified events for a bucket. Currently, the
s3:ReducedRedundancyLostObject event is the only event supported for notifications. The s3:ReducedRedundancyLostObject event is triggered when Amazon S3
detects that it has lost all replicas of an object and can no longer service requests for that object.
If the bucket owner and Amazon SNS topic owner are the same, the bucket owner has permission to publish notifications to the topic by default. Otherwise,
the owner of the topic must create a policy to enable the bucket owner to publish to the topic.
By default, only the bucket owner can configure notifications on a bucket. However, bucket owners can use a bucket policy to grant permission to other
users to set this configuration with s3:PutBucketNotification permission.
After you call the PUT operation to configure notifications on a bucket, Amazon S3 publishes a test notification to ensure that the topic exists and that
the bucket owner has permission to publish to the specified topic. If the notification is successfully published to the SNS topic, the PUT operation
updates the bucket configuration and returns the 200 OK response with a x-amz-sns-test-message-id header containing the message ID of the test notification sent
to topic.
To turn off notifications on a bucket, you specify an empty NotificationConfiguration element in your request
Question : How do you define the "Activity Worker" within the context of Amazon Simple Workflow Service?
1. It is a code piece or program which decide logic
2. Code piece or program where you can run custom garbage collection within the Workflow
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4. It is an individual task done by the workflow
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Explanation: The fundamental concept in Amazon SWF is the workflow. A workflow is a set of activities that carry out some objective,
together with logic that coordinates the activities. For example, a workflow could receive a customer order and take whatever actions are necessary to
fulfill it. Each workflow runs in an AWS resource called a domain, which controls the workflow's scope.
An AWS account can have multiple domains, each of which can contain multiple workflows, but workflows in different domains cannot interact.
When designing an Amazon SWF workflow, you precisely define each of the required activities. You then register each activity with Amazon SWF as an
activity type.
When you register the activity, you provide information such as a name and version, and some timeout values based on how long you expect the activity to
take. For example, a customer may have an expectation that an order will ship within 24 hours.
Such expectations would inform the timeout values that you specify when registering your activities.
In the process of carrying out the workflow, some activities may need to be performed more than once, perhaps with varying inputs.
For example, in a customer-order workflow, you might have an activity that handles purchased items.
If the customer purchases multiple items, then this activity would have to run multiple times.
Amazon SWF has the concept of an activity task that represents one invocation of an activity.
In our example, the processing of each item would be represented by a single activity task.
An activity worker is a program that receives activity tasks, performs them, and provides results back.
Note that the task itself might actually be performed by a person, in which case the person would use the activity worker software for the receipt
and disposition of the task. An example might be a statistical analyst, who receives sets of data, analyzes them, and then sends back the analysis.
Related Questions
Question : You are working with a Bank as a solution architect, to develop their mobile wallet applications and you decide to use all transactions will
be stored in Amazon RDS with Multi-AZ deployment. Entire application has been productionized and CloudWatch alarm has been created, which send
monitoring detail (only critical) to your mobile using SNS (simple notification service). One night you got an alert that your primary RDS instance has
gone down. What is your immediate step to move to secondary DB instance?
1. You immediately contact your production support team, they might have got same alert and ask them to change the DNS entry so that
application can point to secondary DB instance.
2. Ask application developer team to change the configuration file where database connection string is configured.
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4. You must monitor the application and RDS. Because of primary failure anything wrong happen.
Question : You are having SQL Server enterprise edition, to run your in-house HR application on that. However, you get to know that your only DBA is
leaving the organization and on notice period will 30 days and he suggested, he will help you to have some solution where you can run your application
without DBA for some time until you hire new one. And he suggested to moving database solution to AWS managed service AWS RDS. What is the correct
statement for given scenario?
1. DBA will launch AWS RDS instance and install SQL server (Enterprise edition on it). You will be using your own license using BYOD
model.
2. DBA will launch AWS RDS instance and install SQL server (Enterprise edition on it) and you will be using the RDS instance where
license is already included in cost. So you don’t have to have explicit license purchased.
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no used.
4. DBA will create SQL Server free edition RDS instance, so that he can save the hug licensing cost.
Question : You are implementing a website solution for an existing website, who had a hosting with the hosting provider and having a web server and a
database server in backend. However, you need to migrate this website to AWS, which can provide high availability and resiliency for both the web server
and database server. Hence, you decided to have at least 2 web server public facing and 2 db server in highly protected. How many subnet you should have
created to have for the given scenario?
1. You will be having one subnet only in AWS and configure security and NACL for the DB server.
2. You will be having two subnet one public facing for web server and one private for D
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4. You will be having eight subnet four public facing for web server and four private for DB
Question : You have been working with a retail company to bring their store to online, they are very popular offline store with a global chain. As
soon as they come online, they are expecting a huge customer base. Now, you need to implement database solutions, where user’s sessions and profile can
be stored for millions of users and with the high performance. Which of the following is best choice for this requirement?
1. You will be creating Amazon RDS instance for Aurora based database, which is optimized MySQL DB from Amazon.
2. You will be using Amazon Redshift for given requirement,
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4. You will consider using AWS S3 Standard-IA storage
Question : For Arinika Inc , mobile wallet transactional data store. You decided to use amazon RDS. You want to set RPO and RTO to define the
acceptable amount of data loss and also amount of time to recover from incident. Which of the following option will help you to define RTO and RPO?
A. DB Snapshots
B. DB Option groups
C. Read-Replica
D. Multi-AZ deployments
E. Manual Snapshot backup
1. A,B,C
2. B,C,D
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4. A,D,E
5. A,C,D
Question : You are very small startup doing consulting as well as doing website hosting on behalf of client, you are handling project for various
different kind of clients like adult content hosting, health care data site, financial data site etc. and many more coming in future. You have already
created a VPC and will be dividing this VPC in various subnet for each client. However, each client site traffic is enough to have at max 10 servers
(including DB, storage, webserver, app server and many more) to serve the website, hence you created a small subnet for each client with /28. But after
six month it is found that website hosting adult content need more servers for various other reasons and need different ip addresses as well. Which of
the following statement is true here.
1. You can have only 11 ipV4 addresses available in each subnet.
2. You can have up to 28 different ip addresses for this website.
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4. You have inform AWS support that, you want to expand your subnet to accommodate more ip address and they will help your to expand
the same.