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Q91. A user is planning a highly available application deployment with EC2. Which of the below mentioned options will not help to achieve HA?

A. Elastic IP address

B. PIOPS

C. AMI

D. Availability Zones 

Answer: B

Explanation:

In Amazon Web Service, the user can achieve HA by deploying instances in multiple zones. The elastic IP helps the user achieve HA when one of the instances is down but still keeps the same URL. The AM helps launching the new instance. The PIOPS is for the performance of EBS and does not help for HA. Reference: http://media.amazonwebservices.com/AWS_Web_Hosting_Best_Practices.pdf

Q92. Your customer wishes to deploy an enterprise application to AWS which will consist of several web servers, several application servers and a small (50GB) Oracle database information is stored, both in the database and the file systems of the various servers. The backup system must support database recovery whole server and whole disk restores, and indMdual file restores with a recovery time of no more than two hours. They have chosen to use RDS Oracle as the database

Which backup architecture will meet these requirements?

A. Backup RDS using automated daily DB backups Backup the EC2 instances using AMs and

supplement with file-level backup to 53 using traditional enterprise backup software to provide fi Ie level restore

B. Backup RDS using a Multi-AZ Deployment Backup the EC2 instances using Amis, and supplement by copying file system data to 53 to provide file level restore.

C. Backup RDS using automated daily DB backups Backup the EC2 instances using EBS snapshots and supplement with file-level backups to Amazon Glacier using traditional enterprise backup software to provide file level restore

D. Backup RDS database to 53 using Oracle RMAN Backup the EC2 instances using Amis, and supplement with EBS snapshots for indMdual volume restore.

Answer:

Explanation:

Point-In-Time Recovery

In addition to the daily automated backup, Amazon RDS archives database change logs. This enables you to recover your database to any point in time during the backup retention period, up to the last five minutes of database usage.

Amazon RDS stores multiple copies of your data, but for Single-AZ DB instances these copies are stored in a single availability zone. If for any reason a Single-AZ DB instance becomes unusable, you can use point-in-time recovery to launch a new DB instance with the latest restorable data. For more information on working with point-in-time recovery, go to Restoring a DB Instance to a Specified Time.

Note

Mu|ti-AZ deployments store copies of your data in different Availability Zones for greater levels of data durability. For more information on Multi-AZ deployments, see High Availability (MuIti-AZ).

Q93. Through which of the following interfaces is AWS Identity and Access Management available?

A) AWS Management Console

B) Command line interface (CLI}

C) IAM Query API

D) Existing libraries

A. Only through Command line interface (CLI )

B. A, Band C

C. A and C

D. All of the above 

Answer: D

Q94. Can resource record sets in a hosted zone have a different domain suffix (for example, www.bIog. acme.com and www.acme.ca)?

A. Yes, it can have for a maximum of three different TLDs.

B. Yes

C. Yes, it can have depending on the TLD.

D. No

Answer:

Explanation:

The resource record sets contained in a hosted zone must share the same suffix. For example, the exampIe.com hosted zone can contain resource record sets for www.exampIe.com and wvvw.aws.exampIe.com subdomains, but it cannot contain resource record sets for a www.exampIe.ca subdomain.

Reference:  http://docs.aws.amazon.com/Route53/Iatest/DeveIoperGuide/AboutHostedZones.html

Q95. You are looking at ways to improve some existing infrastructure as it seems a lot of engineering resources are being taken up with basic management and monitoring tasks and the costs seem to be excessive.

You are thinking of deploying Amazon E|asticCache to help. Which of the following statements is true in regards to EIasticCache?

A. You can improve load and response times to user actions and queries however the cost associated with scaling web applications will be more.

B. You can't improve load and response times to user actions and queries but you can reduce the cost associated with scaling web applications.

C. You can improve load and response times to user actions and queries however the cost associated with scaling web applications will remain the same.

D. You can improve load and response times to user actions and queries and also reduce the cost associated with scaling web applications.

Answer:

Explanation:

Amazon EIastiCache is a web service that makes it easy to deploy and run Memcached or Redis protocol-compliant server nodes in the cloud. Amazon EIastiCache improves the performance of web applications by allowing you to retrieve information from a fast, managed, in-memory caching system, instead of relying entirely on slower disk-based databases. The service simplifies and offloads the management, monitoring and operation of in-memory cache environments, enabling your engineering resources to focus on developing applications.

Using Amazon EIastiCache, you can not only improve load and response times to user actions and queries, but also reduce the cost associated with scaling web applications.

Reference: https://aws.amazon.com/eIasticache/faqs/

Q96. Are penetration tests allowed as long as they are limited to the customer's instances?

A. Yes, they are allowed but only for selected regions.

B. No, they are never allowed.

C. Yes, they are allowed without any permission.

D. Yes, they are allowed but only with approval.

Answer: D

Explanation:

Penetration tests are allowed after obtaining permission from AWS to perform them. Reference: http://aws.amazon.com/security/penetration-testing/

Q97. You are setting up a VPC and you need to set up a public subnet within that VPC. Which following requirement must be met for this subnet to be considered a public subnet?

A. Subnet's traffic is not routed to an internet gateway but has its traffic routed to a virtual private gateway.

B. Subnet's traffic is routed to an internet gateway.

C. Subnet's traffic is not routed to an internet gateway.

D. None of these answers can be considered a public subnet. 

Answer: B

Explanation:

A virtual private cloud (VPC) is a virtual network dedicated to your AWS account. It is logically isolated from other virtual networks in the AWS cloud. You can launch your AWS resources, such as Amazon EC2 instances, into your VPC. You can configure your VPC: you can select its IP address range, create   subnets, and configure route tables, network gateways, and security settings.

A subnet is a range of IP addresses in your VPC. You can launch AWS resources into a subnet that you select. Use a public subnet for resources that must be connected to the internet, and a private subnet for resources that won't be connected to the Internet.

If a subnet's traffic is routed to an internet gateway, the subnet is known as a public subnet.

If a subnet doesn't have a route to the internet gateway, the subnet is known as a private subnet.

If a subnet doesn't have a route to the internet gateway, but has its traffic routed to a virtual private gateway, the subnet is known as a VPN-only subnet.

Reference: http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Subnets.html

Q98. In Amazon Elastic Compute Cloud, which ofthe following is used for communication between instances in the same network (EC2-Classic or a VPC)?

A. Private IP addresses

B. Elastic IP addresses

C. Static IP addresses

D. Public IP addresses 

Answer: A

Explanation:

A private IP address is an IP address that's not reachable over the Internet. You can use private IP addresses for communication between instances in the same network (EC2-Classic or a VPC). Reference:

http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/using-instance-addressing.htmI

Q99. In an experiment, if the minimum size for an Auto Scaling group is 1 instance, which of the following statements holds true when you terminate the running instance?

A. Auto Scaling must launch a new instance to replace it.

B. Auto Scaling will raise an alarm and send a notification to the user for action.

C. Auto Scaling must configure the schedule actMty that terminates the instance after 5 days.

D. Auto Scaling will terminate the experiment. 

Answer: A

Explanation:

If the minimum size for an Auto Scaling group is 1 instance, when you terminate the running instance, Auto Scaling must launch a new instance to replace it.

Reference:http://docs.aws.amazon.com/AutoScaIing/latest/Deve|operGuide/AS_Concepts.htmI

Q100. Select a true statement about Amazon EC2 Security Groups (EC2-Classic).

A. After you launch an instance in EC2-Classic, you can't change its security groups.

B. After you launch an instance in EC2-Classic, you can change its security groups only once.

C. After you launch an instance in EC2-Classic, you can only add rules to a security group.

D. After you launch an instance in EC2-Classic, you cannot add or remove rules from a security group. 

Answer: A

Explanation:

After you launch an instance in EC2-Classic, you can't change its security groups. However, you can add rules to or remove rules from a security group, and those changes are automatically applied to all instances that are associated with the security group.

Reference:  http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/using-network-security.html

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