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AWS Certified Developer - Associate Questions and Answers (Dumps and Practice Questions)



Question : You have a website www.Acmeshell.com which is hosted using Apache Webserver and also having a backend MySQL RDS instance.
You will not use the DB for the next 3 months. How can the user save costs?
: You have a website www.Acmeshell.com which is hosted using Apache Webserver and also having a backend MySQL RDS instance.
1. Create a snapshot of RDS to launch in the future and terminate the instance now
2. Pause the RDS activities from CLI until it is required in the future
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4. Stop the RDS instance

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Explanation: Amazon RDS automated backups and DB snapshots are currently supported for all DB engines. For the MySQL DB engine, only the InnoDB storage engine is supported; use of these features with other MySQL storage engines, including MyISAM, may lead to unreliable behavior while restoring from backups. Specifically, since storage engines like MyISAM do not support reliable crash recovery, your tables can be corrupted in the event of a crash. For this reason, we encourage you to use the InnoDB storage engine. 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. DB snapshots are user-initiated and enable you to back up your DB instance in a known state as frequently as you wish, and then restore to that specific state at any time. DB snapshots can be created with the Amazon RDS console or the CreateDBSnapshot action in the Amazon RDS API. DB snapshots are kept until you explicitly delete them with the Amazon RDS console or the DeleteDBSnapshot action in the Amazon RDS API.







Question : There is a regulatory requirement to store each and every data point inserted on your website, hence you have setup
an automated backup between 5 AM - 5:30 AM for the MySQL RDS DB. Will the performance of RDS get frozen momentarily during a backup?
: There is a regulatory requirement to store each and every data point inserted on your website, hence you have setup
1. Yes, provided it is a single zone implementation
2. Yes, always
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4. No

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Explanation: Amazon RDS provides two different methods for backing up and restoring the Amazon DB instances. A brief I/O freeze, typically lasting a few seconds, occurs during both automated backups and DB snapshot operations on Single-AZ DB instances. DB Instance Backups

Amazon RDS provides two different methods for backing up and restoring your Amazon DB instances: automated backups and DB snapshots. Automated backups automatically back up your DB instance during a specific, user-definable backup window, and keeps the backups for a limited, user-specified period of time (called the backup retention period); you can later recover your database to any point in time during that retention period. DB snapshots are user-initiated backups that enable you to back up your DB instance to a known state, and restore to that specific state at any time. Amazon RDS keeps all DB snapshots until you delete them.

Note : A brief I/O freeze, typically lasting a few seconds, occurs during both automated backups and DB snapshot operations on Single-AZ DB instances.
Automated Backup
Automated backup is an Amazon RDS feature that automatically creates a backup of your database. Automated backups are enabled by default for a new DB instance.
An automated backup occurs during a daily user-configurable period of time known as the preferred backup window. Backups created during the backup window are retained for a user-configurable number of days (the backup retention period).

Note : An immediate outage will occur if you change the backup retention period from 0 to a non-zero value or from a non-zero value to 0.

The preferred backup window is the user-defined period of time during which your DB instance is backed up. Amazon RDS uses these periodic data backups in conjunction with your transaction logs to enable you to restore your DB instance to any second during your retention period, up to the LatestRestorableTime (typically up to the last five minutes). During the backup window, storage I/O may be suspended while your data is being backed up and you may experience elevated latency. This I/O suspension typically lasts for the duration of the snapshot. This period of I/O suspension is shorter for Multi-AZ DB deployments, since the backup is taken from the standby, but latency can occur during the backup process.

When the backup retention changes to a non-zero value, the first backup occurs immediately. Changing the backup retention period to 0 turns off automatic backups for the DB instance, and deletes all existing automated backups for the instance.

If you don't specify a preferred backup window when you create the DB instance, Amazon RDS assigns a default 30-minute backup window which is selected at random from an 8-hour block of time per region.







Question : To host a Apache WebServer for the www.HadoopExam.com website you are launching an instance with EC,
which of the below mentioned options is not available during the instance launch console for a key pair?
: To host a Apache WebServer for the www.HadoopExam.com website you are launching an instance with EC,
1. Upload a new key pair
2. Create a new key pair
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4. Select an existing key pair

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Explanation: Launching an Instance

Before you launch your instance, be sure that you are set up. For more information, see Setting Up with Amazon EC2.

Your AWS account might support both the EC2-Classic and EC2-VPC platforms, depending on when you created your account and which regions you've used. To find out which platform your account supports, see Supported Platforms. If your account supports EC2-Classic, you can launch an instance into either platform. If your account supports EC2-VPC only, you can launch an instance into a VPC only. While launching an EC2 instance, the user can create a new key pair, select an existing key pair or proceed without a key pair. The user cannot upload a new key pair in the EC2 instance launch console. We recommend against selecting the Proceed without key pair option. If you launch an instance without a key pair, you won't be able to connect to it. This option is used only when you are creating your own AMI and don't need to connect to the instance.



Related Questions

Question : You havesetup Multi AZ with the MS SQL RDS instance. Which of the below mentioned functionalities can be achieved by you?
 : You havesetup Multi AZ with the MS SQL RDS instance. Which of the below mentioned functionalities can be achieved by you?
1. High availability
2. Scalability
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4. Disaster recovery



Question : You have created an RDS instance with MySQL.
Now you are using the HeidiSQL client to connect with the RDS DB.
The client is unable to connect to DB from his home machine. What is a possible reason for the failure?
 : You have created an RDS instance with MySQL.
1. You can never connect to RDS from your desktop
2. The security group is not configured to allow a request from the user's IP on port 3306
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4. The user has to open port 22 in the RDS security group to connect with RDS DNS



Question : Being Developer for AWS at QuickTechie.com you are launching an AWS RDS with MySQL.
Which of the below mentioned options allows you to configure the INNODB engine parameters?
 : Being Developer for AWS at QuickTechie.com you are launching an AWS RDS with MySQL.
1. Engine parameters
2. DB parameters
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4. Options group



Question : You have created a MySQL RDS instance as backend database for www.QuickTechie.com website.
Which of the below mentioned options is mandatory to configure while creating an instance?
 : You have created a MySQL RDS instance as backend database for www.QuickTechie.com website.
1. Maintenance window
2. Multi AZ deployment setup
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4. Availability Zone


Question : You are launching an AWS RDS instance with MySQL as backend database for www.QuickTechie.com website.
Now you wants to enable the Multi AZ feature. Which of the below mentioned parameters will not be allowed to configure by RDS?
 : You are launching an AWS RDS instance with MySQL as backend database for www.QuickTechie.com website.
1. DB subnet group
2. Availability Zone
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4. Database port




Question : An EC instance has one additional EBS volume attached to it. How can you attach the same volume to another running instance in the same AZ?
 : An EC instance has one additional EBS volume attached to it. How can you attach the same volume to another running instance in the same AZ?
1. Detach the volume first and attach to new instance
2. Attach the volume as read only to the second instance
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4. No need to detach. Just select the volume and attach it to the new instance, it will take care of mapping internally