AWS-Certified-Developer-Associate Exam
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Q81. A user is creating multiple IAM users. What advice should be given to him to enhance the security?
A. Grant least prMleges to the indMdual user
B. Grant all higher prMleges to the group
C. Grant less prMleges for user, but higher prMleges for the group
D. Grant more prMleges to the user, but least prMleges to the group
Answer: A
Explanation:
It is a recommended rule that the root user should grant the least prMleges to the IAM user or the group. The higher the prMleges, the more problems it can create.
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/IAMBestPractices.htmI
Q82. A user has enabled serverside encryption with S3. The user downloads the encrypted object from S3. How can the user decrypt it?
A. S3 does not support server side encryption
B. S3 provides a server side key to decrypt the object
C. The user needs to decrypt the object using their own private key
D. S3 manages encryption and decryption automatically
Answer: D
Explanation:
If the user is using the server-side encryption feature, Amazon S3 encrypts the object data before saving it on disks in its data centres and decrypts it when the user downloads the objects. Thus, the user is free from the tasks of managing encryption, encryption keys, and related tools.
Reference: http://docs.aws.amazon.com/AmazonS3/Iatest/dev/UsingEncryption.htmI
Q83. A user has created photo editing software and hosted it on EC2. The software accepts requests from the user about the photo format and resolution and sends a message to S3 to enhance the picture accordingly. Which of the below mentioned AWS services will help make a scalable software with the AWS infrastructure in this scenario?
A. AWS Elastic Transcoder
B. AWS Simple Notification Service
C. AWS Simple Queue Service
D. AWS Glacier
Answer: C
Explanation:
Amazon Simple Queue Service (SQS) is a fast, reliable, scalable, and fully managed message queuing service. SQS provides a simple and cost-effective way to decouple the components of an application. The user can configure SQS, which will decouple the call between the EC2 application and S3. Thus, the application does not keep waiting for S3 to provide the data.
Reference: http://aws.amazon.com/sqs/faqs/
Q84. Regarding Amazon SNS, you can send notification messages to mobile devices through any of the following supported push notification services, EXCEPT:
A. Google Cloud Messaging for Android (GCM)
B. Apple Push Notification Service (APNS)
C. Amazon Device Messaging (ADM)
D. Microsoft Windows Mobile Messaging (MWMM)
Answer: D
Explanation:
In Amazon SNS, you have the ability to send notification messages directly to apps on mobile devices. Notification messages sent to a mobile endpoint can appear in the mobile app as message alerts, badge updates, or even sound alerts. Microsoft Windows MobiIe Messaging (MWMM) doesn’t exist and is not supported by Amazon SNS.
Reference: http://docs.aws.amazon.com/sns/latest/dg/SNSMobiIePush.htmI
Q85. In DynamoDB, could you use IAM to grant access to Amazon DynamoDB resources and API actions?
A. Yes
B. Depended to the type of access
C. In DynamoDB there is no need to grant access
D. No
Answer: A
Explanation:
Amazon DynamoDB integrates with AWS Identity and Access Management (IAM). You can use AWS IAM to grant access to Amazon DynamoDB resources and API actions. To do this, you first write an AWS IAM policy, which is a document that explicitly lists the permissions you want to grant. You then attach that policy to an AWS IAM user or role.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/UsingIAMWithDDB.htmI
Q86. A user is planning to host a web server as well as an app server on a single EC2 instance which is a part of the public subnet of a VPC. How can the user setup to have two separate public IPs and separate security groups for both the application as well as the web server?
A. Launch a VPC instance with two network interfaces. Assign a separate security group to each and AWS will assign a separate public IP to them.
B. Launch VPC with two separate subnets and make the instance a part of both the subnets.
C. Launch a VPC instance with two network interfaces. Assign a separate security group and elastic IP to them.
D. Launch a VPC with ELB such that it redirects requests to separate VPC instances of the public subnet.
Answer: C
Explanation:
If you need to host multiple websites(with different IPs) on a single EC2 instance, the following is the suggested method from AWS.
Launch a VPC instance with two network interfaces
Assign elastic IPs from VPC EIP pool to those interfaces (Because, when the user has attached more than one network interface with an instance, AWS cannot assign public IPs to them.)
Assign separate Security Groups if separate Security Groups are needed
This scenario also helps for operating network appliances, such as firewalls or load balancers that have multiple private IP addresses for each network interface.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/MuItipIeIP.html
Q87. What is the maximum number of tags that a user can assign to an EC2 instance?
A. 50
B. 10
C. 5
D. 25
Answer: B
Explanation:
To help manage EC2 instances as well as their usage in a better way, the user can tag the instances. The tags are metadata assigned by the user which consists of a key and a value. One resource can have a maximum of 10 tags.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/Using_Tags.html
Q88. In regard to DynamoDB, can I delete local secondary indexes?
A. Yes, if it is a primary hash key index
B. No
C. Yes, if it is a local secondary indexes
D. Yes, if it is a Global secondary indexes
Answer: B
Explanation:
In DynamoDB, an index cannot be modified once it is created. Reference: http://aws.amazon.com/dynamodb/faqs/#security_anchor
Q89. Regarding Amazon SQS, are there restrictions on the names of Amazon SQS queues?
A. No
B. Yes. Queue names must be unique within an AWS account and you cannot use hyphens (-) and underscores (_)
C. Yes. Queue names are limited to 80 characters and queue names must be unique within an AWS account
D. Yes. Queue names are limited to 80 characters but queue names do not need to be unique within an AWS account
Answer: C
Explanation:
Queue names are limited to 80 characters. Alphanumeric characters plus hyphens (-) and underscores (_) are allowed. Queue names must be unique within an AWS account. After you delete a queue, you can reuse the queue name.
Reference: https://aws.amazon.com/sqs/faqs/
Q90. Is there a limit to how much throughput you can get out of a single table in DynamoDB?
A. Yes, not more than 1,000 writes/second or 1,000 reads/second
B. No
C. Yes, not more than 10,000 writes/second or 10,000 reads/second
D. No, but If you wish to exceed throughput rates of 10,000 writes/second or 10,000 reads/second, you must first contact AWS.
Answer: D
Explanation:
In DynamoDB, you can increase the throughput you have provisioned for your table using UpdateTabIe API or in the AWS Management Console. If you wish to exceed throughput rates of 10,000 writes/second or 10,000 reads/second, you must first contact AWS.
Reference: http://aws.amazon.com/dynamodb/