AWS-Certified-Developer-Associate Exam
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Q51. A user is trying to understand AWS SNS. To which of the below mentioned end points is SNS unable to send a notification?
A. AWS SES
B. Email JSON
C. AWS SQS
D. HTTP
Answer: A
Explanation:
Amazon Simple Notification Service (Amazon SNS) is a fast, filexible, and fully managed push messaging service. Amazon SNS can deliver notifications by SMS text message or email to the Amazon Simple Queue Service (SQS) queues or to any HTTP endpoint. The user can select one the following
transports as part of the subscription requests: "HTTP", "HTTPS","Emai|", "EmaiI-JSON", "SQS", "and SMS".
Reference: http://aws.amazon.com/sns/faqs/
Q52. When using Amazon SQS how much data can you store in a message?
A. 8 KB
B. 2 KB
C. 16 KB
D. 4 KB
Answer: A
Explanation:
With Amazon SQS version 2008-01-01, the maximum message size for both SOAP and Query requests is 8KB.
If you need to send messages to the queue that are larger than 8 KB, AWS recommends that you split the information into separate messages. Alternatively, you could use Amazon S3 or Amazon Simp|eDB to hold the information and include the pointer to that information in the Amazon SQS message.
If you send a message that is larger than 8KB to the queue, you will receive a MessageTooLong error with HTTP code 400.
Reference: https://aws.amazon.com/items/1343?externaI|D=1343
Q53. Which header received at the EC2 instance identifies the port used by the client while requesting ELB?
A. X-Forvvarded-Proto
B. X-Requested-Proto
C. X-Forvvarded-Port
D. X-Requested-Port
Answer: C
Explanation:
The X-Forvvarded-Port request header helps the user identify the port used by the client while sending a request to ELB.
Reference: http://docs.aws.amazon.com/EIasticLoadBalancing/latest/DeveIoperGuide/TerminologyandKeyConcepts. html
Q54. A user is running a MySQL RDS instance. The user will not use the DB for the next 3 months. How can the user save costs?
A. Pause the RDS actMties from CLI until it is required in the future
B. Stop the RDS instance
C. Create a snapshot of RDS to launch in the future and terminate the instance now
D. Change the instance size to micro
Answer: C
Explanation:
The RDS instances unlike the AWS EBS backed instances cannot be stopped or paused. The user needs to take the final snapshot, terminate the instance and launch a new instance in the future from that snapshot
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.BackingUpAndRestoringAmazonR DSInstances.htmI
Q55. An account owner has created an IAM user with the name examkiller. The account owner wants to give EC2 access of only the US West region to that IAM user. How can the owner configure this?
A. While creating a policy provide the region as a part of the resources
B. Create an IAM user in the US West region and give access to EC2
C. Create an IAM policy and define the region in the condition
D. It is not possible to provide access based on the region
Answer: C
Explanation:
The IAM policy is never region specific. If the user wants to configure the region specific setting, he needs to provide conditions as part of the policy.
Reference: http://awspolicygen.s3.amazonaws.com/poIicygen.htmI
Q56. A user is planning to make a mobile game which can be played online or offline and will be hosted on EC2.
The user wants to ensure that if someone breaks the highest score or they achieve some milestone they can inform all their colleagues through email. Which of the below mentioned AWS services helps achieve this goal?
A. AWS Simple Workflow Service.
B. AWS Simple Queue Service.
C. Amazon Cognito
D. AWS Simple Email Service.
Answer: D
Explanation:
Amazon Simple Email Service (Amazon SES) is a highly scalable and cost-effective email-sending service for businesses and developers. It integrates with other AWS services, making it easy to send emails from applications that are hosted on AWS.
Reference: http://aws.amazon.com/ses/faqs/
Q57. You need to develop and run some new applications on AWS and you know that Elastic Beanstalk and CIoudFormation can both help as a deployment mechAMsm for a broad range of AWS resources. Which of the following statements best describes the differences between Elastic Beanstalk and C|oudFormation?
A. Elastic Beanstalk uses Elastic load balancing and CIoudFormation doesn't.
B. CIoudFormation is faster in deploying applications than Elastic Beanstalk.
C. CIoudFormation is much more powerful than Elastic Beanstalk, because you can actually design and script custom resources
D. Elastic Beanstalk is faster in deploying applications than C|oudFormation.
Answer: C
Explanation:
These services are designed to complement each other. AWS Elastic Beanstalk provides an environment to easily develop and run applications in the cloud. It is integrated with developer tools and provides a one-stop experience for you to manage the lifecycle of your applications. AWS CIoudFormation is a convenient deployment mechAMsm for a broad range of AWS resources. It supports the infrastructure needs of many different types of applications such as existing enterprise applications, legacy applications, applications built using a variety of AWS resources and container-based solutions (including those built using AWS Elastic Beanstalk).
AWS CIoudFormation introduces two new concepts: The template, a JSON-format, text-based file that describes all the AWS resources you need to deploy to run your application and the stack, the set of AWS resources that are created and managed as a single unit when AWS CIoudFormation instantiates a template.
Reference: http://aws.amazon.com/c|oudformation/faqs/
Q58. Which of the following groups is AWS Elastic Beanstalk best suited for?
A. Those who want to deploy and manage their applications within minutes in the AWS cloud
B. Those who want to privately store and manage Git repositories in the AWS cloud.
C. Those who want to automate the deployment of applications to instances and to update the applications as required
D. Those who want to model, visualize, and automate the steps required to release software
Answer: A
Explanation:
AWS Elastic Beanstalk is best suited for those groups who want to deploy and manage their applications within minutes in the AWS cloud. As a bonus, you don’t even need experience with cloud computing to get started.
Reference: https://aws.amazon.com/elasticbeansta|k/faqs/
Q59. You have been doing a lot of testing of your VPC Network by deliberately failing EC2 instances to test whether instances are failing over properly. Your customer who will be paying the AWS bill for all this asks you if he being charged for all these instances. You try to explain to him how the billing works on EC2 instances to the best of your knowledge. What would be an appropriate response to give to the customer
in regards to this?
A. Billing commences when Amazon EC2 AMI instance is completely up and billing ends as soon as the instance starts to shutdown.
B. Billing commences when Amazon EC2 initiates the boot sequence of an AMI instance and billing ends when the instance shuts down.
C. Billing only commences only after 1 hour of uptime and billing ends when the instance terminates.
D. Billing commences when Amazon EC2 initiates the boot sequence of an AMI instance and billing ends as soon as the instance starts to shutdown.
Answer: B
Explanation:
Billing commences when Amazon EC2 initiates the boot sequence of an AMI instance. Billing ends when the instance shuts down, which could occur through a web services command, by running "shutdown -h", or through instance failure.
Reference: http://aws.amazon.com/ec2/faqs/#BiIIing
Q60. Regarding Amazon SNS, to begin using Amazon SNS mobile push notifications, you first need that uses one of the supported push notification services: APNS, GCM, or ADM.
A. an access policy for the mobile endpoints
B. to active push notification service of Amazon SNS
C. to know the type of mobile device operating system
D. an app for the mobile endpoints
Answer: D
Explanation:
In Amazon SNS, to begin using Amazon SNS mobile push notifications, you first need an app for the mobile endpoints that uses one of the supported push notification services: APNS, GCM, or ADM. After you've registered and configured the app to use one of these services, you configure Amazon SNS to send push notifications to the mobile endpoints.
Reference: http://docs.aws.amazon.com/sns/latest/dg/SNSMobiIePush.htmI