AWS-Certified-Developer-Associate Exam
A Review Of Exact AWS-Certified-Developer-Associate practice
Testking offers free demo for AWS-Certified-Developer-Associate exam. "AWS Certified Developer Associate", also known as AWS-Certified-Developer-Associate exam, is a Amazon Certification. This set of posts, Passing the Amazon AWS-Certified-Developer-Associate exam, will help you answer those questions. The AWS-Certified-Developer-Associate Questions & Answers covers all the knowledge points of the real exam. 100% real Amazon AWS-Certified-Developer-Associate exams and revised by experts!
Q81. Bob is an IAM user who has access to the EC2 services. Admin is an IAM user who has access to all the AWS services including IAM. Can Bob change his password?
A. No, the IAM user can never change the password
B. Yes, provided Admin has given Bob access to change his password
C. Yes, only from AWS CLI
D. Yes, only from the AWS console
Answer: B
Explanation:
The IAM users by default cannot change their password. The root owner or IAM administrator needs to set the policy in the password policy page, which should allow the user to change their password. Once it is enabled, the IAM user can always change their passwords from the AWS console or CLI.
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/Using_ManagingUserPwdSeIf.htm|
Q82. An orgAMzation is having an application which can start and stop an EC2 instance as per schedule. The orgAMzation needs the MAC address of the instance to be registered with its software. The instance is launched in EC2-CLASSIC. How can the orgAMzation update the MAC registration every time an instance is booted?
A. The instance MAC address never changes. Thus, it is not required to register the MAC address every time.
B. The orgAMzation should write a boot strapping script which will get the MAC address from the instance metadata and use that script to register with the application.
C. AWS never provides a MAC address to an instance; instead the instance ID is used for identifying the instance for any software registration.
D. The orgAMzation should provide a MAC address as a part of the user data. Thus, whenever the instance is booted the script assigns the fixed MAC address to that instance.
Answer: B
Explanation:
AWS provides an on demand, scalable infrastructure. AWS EC2 allows the user to launch On-Demand instances. AWS does not provide a fixed MAC address to the instances launched in EC2-CLASSIC. If the instance is launched as a part of EC2-VPC, it can have an ENI which can have a fixed MAC. However, with EC2-CLASSIC, every time the instance is started or stopped it will have a new MAC address.
To get this MAC, the orgAMzation can run a script on boot which can fetch the instance metadata and get the MAC address from that instance metadata. Once the MAC is received, the orgAMzation can register that MAC with the software.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AESDG-chapter-instancedata.html
Q83. Which of the following device names is recommended for an EBS volume that can be attached to an Amazon EC2 Instance running Windows?
A. xvd[a-e]
B. /mnt/sd[b-e]
C. xvd[f-p]
D. /dev/sda1
Answer: C
Explanation:
The xvd[f-p] is the recommended device name for EBS volumes that can be attached to the Amazon EC2 Instances running on Windows.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/device_naming.html
Q84. 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/
Q85. 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
Q86. Does Amazon DynamoDB support both increment and decrement atomic operations?
A. No, neither increment nor decrement operations.
B. Only increment, since decrement are inherently impossible with DynamoDB's data model.
C. Only decrement, since increment are inherently impossible with DynamoDB's data model.
D. Yes, both increment and decrement operations.
Answer: D
Explanation:
Amazon DynamoDB supports increment and decrement atomic operations.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/APISummary.html
Q87. True or False: In DynamoDB, Scan operations are always eventually consistent.
A. No, scan is like Query operation
B. Yes
C. No, scan is strongly consistent by default
D. No, you can optionally request strongly consistent scan.
Answer: B
Explanation:
In DynamoDB, Scan operations are always eventually consistent.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/APISummary.htmI
Q88. Can a user associate and use his own DNS with ELB instead ofthe DNS provided by AWS ELB?
A. Yes, by creating a CNAME with the existing domain name provider
B. Yes, by configuring DNS in the AWS Console
C. No
D. Yes, only through Route 53 by mapping ELB and DNS
Answer: A
Explanation:
The AWS ELB allows mapping a custom domain name with ELB. The user can map ELB with DNS in two ways: 1) By creating CNAME with the existing domain name service provider or 2) By creating a record with Route 53.
Reference:
http://docs.aws.amazon.com/E|asticLoadBaIancing/latest/DeveIoperGuide/using-domain-names-with-elb. html
Q89. An orgAMzation has 20 employees. The orgAMzation wants to give all the users access to the orgAMzation AWS account. Which of the below mentioned options is the right solution?
A. Share the root credentials with all the users
B. Create an IAM user for each employee and provide access to them
C. It is not advisable to give AWS access to so many users
D. Use the IAM role to allow access based on STS
Answer: B
Explanation:
AWS Identity and Access Management is a web service that enables the AWS customers to manage users and user permissions in AWS. The IAM is targeted at orgAMzations with multiple users or systems that use AWS products such as Amazon EC2, Amazon RDS, and the AWS Management Console. With IAM, the orgAMzaiton can centrally manage users, security credentials such as access keys, and permissions that control which AWS resources users can access.
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/IAM_Introduction.htm|
Q90. A user wants to access RDS from an EC2 instance using IP addresses. Both RDS and EC2 are in the same region, but different AZs. Which of the below mentioned options help configure that the instance is accessed faster?
A. Configure the Private IP of the Instance in RDS security group
B. Security group of EC2 allowed in the RDS security group
C. Configuring the elastic IP of the instance in RDS security group
D. Configure the Public IP of the instance in RDS security group
Answer: A
Explanation:
If the user is going to specify an IP range in RDS security group, AWS recommends using the private IP address of the Amazon EC2 instance. This provides a more direct network route from the Amazon EC2 instance to the Amazon RDS DB instance, and does not incur network charges for the data sent outside of the Amazon network.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithSecurityGroups.html