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Q1. A user is running a batch process which runs for 1 hour every day. Which of the below mentioned options is the right instance type and costing model in this case if the user performs the same task for the whole year?
A. EBS backed instance with on-demand instance pricing.
B. EBS backed instance with heavy utilized reserved instance pricing.
C. EBS backed instance with low utilized reserved instance pricing.
D. Instance store backed instance with spot instance pricing.
Answer: A
Explanation:
For Amazon Web Services, the reserved instance helps the user save money if the user is going to run the same instance for a longer period. Generally if the user uses the instances around 30-40% annually it is recommended to use RI. Here as the instance runs only for 1 hour daily it is not recommended to have RI as it will be costlier. The user should use on-demand with EBS in this case.
Reference: http://aws.amazon.com/ec2/purchasing-options/reserved-instances/
Q2. A user has hosted an application on EC2 instances. The EC2 instances are configured with ELB and Auto Scaling. The application server session time out is 2 hours. The user wants to configure connection draining to ensure that all in-flight requests are supported by ELB even though the instance is being deregistered. What time out period should the user specify for connection draining?
A. 1 hour
B. 30 minutes
C. 5 minutes
D. 2 hours
Answer: A
Explanation:
The Elastic Load Balancer connection draining feature causes the load balancer to stop sending new requests to the back-end instances when the instances are deregistering or become unhealthy, while ensuring that in-flight requests continue to be served. The user can specify a maximum time of 3600
seconds (1 hour) for the load balancer to keep the connections alive before reporting the instance as deregistered. If the user does not specify the maximum timeout period, by default, the load balancer will close the connections to the deregistering instance after 300 seconds.
Reference:
http://docs.aws.amazon.com/EIasticLoadBaIancing/latest/DeveIoperGuide/config-conn-drain.htmI
Q3. You have deployed a three-tier web application in a VPC with a CIOR block of 10 0 0 0/ 28 You initially deploy two web servers, two application sewers, two database sewers and one NAT instance tor a total of seven EC2 instances The web. Application and database servers are deployed across two availability zones (AZs). You also deploy an ELB in front of the two web sewers, and use Route53 for DN5 Web (raffile gradually increases in the first few days following the deployment, so you attempt to double the number of instances in each tier of the application to handle the new load unfortunately some of these new instances fail to launch.
Which of the following could De the root caused? (Choose 2 answers)
A. AW5 resewes the first and the last private IP address in each subnet's CIDR block so you do not have enough addresses left to launch all of the new EC2 instances
B. The Internet Gateway (IGW) of your VPC has scaled-up, adding more instances to handle the traffic spike, reducing the number of available private IP addresses for new instance launches
C. The ELB has scaled-up, adding more instances to handle the traffic spike, reducing the number of available private IP addresses for new instance launches
D. AW5 reserves one IP address in each subnet's CIDR block for Route53 so you do not have enough addresses left to launch all of the new EC2 instances
E. AW5 reserves the first four and the last IP address in each subnet's CIDR block so you do not have
enough addresses left to launch all of the new EC2 instances
Answer: C, E
Q4. You need to import several hundred megabytes of data from a local Oracle database to an Amazon RDS DB instance. What does AWS recommend you use to accomplish this?
A. Oracle export/import utilities
B. Oracle SQL Developer
C. Oracle Data Pump
D. DBMS_FILE_TRANSFER
Answer: C
Explanation:
How you import data into an Amazon RDS DB instance depends on the amount of data you have and the number and variety of database objects in your database.
For example, you can use Oracle SQL Developer to import a simple, 20 MB database; you want to use Oracle Data Pump to import complex databases or databases that are several hundred megabytes or several terabytes in size.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Oracle.Procedural.Importing.htmI
Q5. Before I delete an EBS volume, what can I do if I want to recreate the volume later?
A. Create a copy of the EBS volume (not a snapshot)
B. Store a snapshot of the volume
C. Download the content to an EC2 instance
D. Back up the data in to a physical disk
Answer: B
Q6. You have deployed a web application targeting a global audience across multiple AWS Regions under the domain name.exampIe.com. You decide to use Route53 Latency-Based Routing to serve web requests to users from the region closest to the user. To provide business continuity in the event of server downtime you configure weighted record sets associated with two web servers in separate Availability Zones per region. Dunning a DR test you notice that when you disable all web sewers in one of the regions Route53 does not automatically direct all users to the other region. What could be happening? {Choose 2 answers)
A. Latency resource record sets cannot be used in combination with weighted resource record sets.
B. You did not setup an HTIP health check tor one or more of the weighted resource record sets associated with me disabled web sewers.
C. The value of the weight associated with the latency alias resource record set in the region with the disabled sewers is higher than the weight for the other region.
D. One of the two working web sewers in the other region did not pass its HTIP health check.
E. You did not set "Evaluate Target Health" to "Yes" on the latency alias resource record set associated with example com in the region where you disabled the sewers.
Answer: B, E
Explanation:
How Health Checks Work in Complex Amazon Route 53 Configurations
Checking the health of resources in complex configurations works much the same way as in simple configurations. However, in complex configurations, you use a combination of alias resource record sets (including weighted alias, latency alias, and failover alias) and nonalias resource record sets to build a decision tree that gives you greater control over how Amazon Route 53 responds to requests.
For more information, see How Health Checks Work in Simple Amazon Route 53 Configurations.
For example, you might use latency alias resource record sets to select a region close to a user and use weighted resource record sets for two or more resources within each region to protect against the failure of a single endpoint or an Availability Zone. The following diagram shows this configuration.
Here's how Amazon EC2 and Amazon Route 53 are configured:
You have Amazon EC2 instances in two regions, us-east-1 and ap-southeast-2. You want Amazon Route 53 to respond to queries by using the resource record sets in the region that provides the lowest latency for your customers, so you create a latency alias resource record set for each region.
(You create the latency alias resource record sets after you create resource record sets for the indMdual Amazon EC2 instances.)
Within each region, you have two Amazon EC2 instances. You create a weighted resource record set for each instance. The name and the type are the same for both of the weighted resource record sets in each region.
When you have multiple resources in a region, you can create weighted or failover resource record sets for your resources. You can also create even more complex configurations by creating weighted alias or failover alias resource record sets that, in turn, refer to multiple resources.
Each weighted resource record set has an associated health check. The IP address for each health check matches the I P address for the corresponding resource record set. This isn't required, but it's the most common configuration.
For both latency alias resource record sets, you set the value of Evaluate Target Health to Yes.
You use the Evaluate Target Health setting for each latency alias resource record set to make Amazon Route 53 evaluate the health of the alias targets-the weighted resource record sets-and respond accordingly.
The preceding diagram illustrates the following sequence of events:
Amazon Route 53 receives a query for exampIe.com. Based on the latency for the user making the request, Amazon Route 53 selects the latency alias resource record set for the us-east-1 region.
Amazon Route 53 selects a weighted resource record set based on weight. Evaluate Target Health is Yes for the latency alias resource record set, so Amazon Route 53 checks the health of the selected weighted resource record set.
The health check failed, so Amazon Route 53 chooses another weighted resource record set based on weight and checks its health. That resource record set also is unhealthy.
Amazon Route 53 backs out of that branch of the tree, looks for the latency alias resource record set with the next-best latency, and chooses the resource record set for ap-southeast-2.
Amazon Route 53 again selects a resource record set based on weight, and then checks the health of the selected resource record set . The health check passed, so Amazon Route 53 returns the applicable value in response to the query.
What Happens When You Associate a Health Check with an Alias Resource Record Set?
You can associate a health check with an alias resource record set instead of or in addition to setting the value of Evaluate Target Health to Yes. However, it's generally more useful if Amazon Route 53 responds to queries based on the health of the underlying resources- the HTTP sewers, database servers, and
other resources that your alias resource record sets refer to. For example, suppose the following configuration:
You assign a health check to a latency alias resource record set for which the alias target is a group of weighted resource record sets.
You set the value of Evaluate Target Health to Yes for the latency alias resource record set.
In this configuration, both of the following must be true before Amazon Route 53 will return the applicable value for a weighted resource record set:
The health check associated with the latency alias resource record set must pass.
At least one weighted resource record set must be considered healthy, either because it's associated with a health check that passes or because it's not associated with a health check. In the latter case, Amazon Route 53 always considers the weighted resource record set healthy.
If the health check for the latency alias resource record set fails, Amazon Route 53 stops responding to queries using any of the weighted resource record sets in the alias target, even if they're all healthy. Amazon Route 53 doesn't know the status of the weighted resource record sets because it never looks past the failed health check on the alias resource record set.
What Happens When You Omit Health Checks?
In a complex configuration, it's important to associate health checks with all of the non-alias resource record sets. Let's return to the preceding example, but assume that a health check is missing on one of the weighted resource record sets in the us-east-1 region:
Here's what happens when you omit a health check on a non-alias resource record set in this configuration:
Amazon Route 53 receives a query for exampIe.com. Based on the latency for the user making the request, Amazon Route 53 selects the latency alias resource record set for the us-east-1 region.
Amazon Route 53 looks up the alias target for the latency alias resource record set, and checks the status of the corresponding health checks. The health check for one weighted resource record set failed, so that resource record set is omitted from consideration.
The other weighted resource record set in the alias target for the us-east-1 region has no health check. The corresponding resource might or might not be healthy, but without a health check, Amazon Route 53 has no way to know. Amazon Route 53 assumes that the resource is healthy and returns the applicable value in response to the query.
What Happens When You Set Evaluate Target Health to No?
In general, you also want to set Evaluate Target Health to Yes for all of the alias resource record sets. In the following example, all of the weighted resource record sets have associated health checks, but Evaluate Target Health is set to No for the latency alias resource record set for the us-east-1 region:
Here's what happens when you set Evaluate Target Health to No for an alias resource record set in this configuration:
Amazon Route 53 receives a query for exampIe.com. Based on the latency for the user making the request, Amazon Route 53 selects the latency alias resource record set for the us-east-1 region.
Amazon Route 53 determines what the alias target is for the latency alias resource record set, and checks the corresponding health checks. They're both failing.
Because the value of Evaluate Target Health is No for the latency alias resource record set for the us-east-1 region, Amazon Route 53 must choose one resource record set in this branch instead of backing out of the branch and looking for a healthy resource record set in the ap-southeast-2 region.
Q7. Please select the Amazon EC2 resource which can be tagged.
A. key pairs
B. Elastic IP addresses
C. placement groups
D. Amazon EBS snapshots
Answer: C
Q8. You are setting up your first Amazon Virtual Private Cloud (Amazon VPC) network so you decide you should probably use the AWS Management Console and the VPC Wizard. Which of the following is not an option for network architectures after launching the "Start VPC Wizard" in Amazon VPC page on the AWS Management Console?
A. VPC with a Single Public Subnet Only
B. VPC with a Public Subnet Only and Hardware VPN Access
C. VPC with Public and Private Subnets and Hardware VPN Access
D. VPC with a Private Subnet Only and Hardware VPN Access
Answer: B
Explanation:
Amazon VPC enables you to build a virtual network in the AWS cloud - no VPNs, hardware, or physical datacenters required.
Your AWS resources are automatically provisioned in a ready-to-use default VPC. You can choose to create additional VPCs by going to Amazon VPC page on the AWS Management Console and click on the "Start VPC Wizard" button.
You’II be presented with four basic options for network architectures. After selecting an option, you can modify the size and IP address range of the VPC and its subnets. If you select an option with Hardware VPN Access, you will need to specify the IP address of the VPN hardware on your network. You can modify the VPC to add more subnets or add or remove gateways at any time after the VPC has been created.
The four options are:
VPC with a Single Public Subnet Only VPC with Public and Private Subnets
VPC with Public and Private Subnets and Hardware VPN Access VPC with a Private Subnet Only and Hardware VPN Access Reference: https://aws.amazon.com/vpc/faqs/
Q9. Please select the most correct answer regarding the persistence of the Amazon Instance Store
A. The data on an instance store volume persists only during the life of the associated Amazon EC2 instance
B. The data on an instance store volume is lost when the security group rule of the associated instance is changed.
C. The data on an instance store volume persists even after associated Amazon EC2 instance is deleted
Answer: B
Q10. Which Amazon service can I use to define a virtual network that closely resembles a traditional data center?
A. Amazon VPC
B. Amazon Service Bus
C. Amazon EMR
D. Amazon RDS
Answer: A
Q11. Multi-AZ deployment _ supported for Microsoft SQL Server DB Instances.
A. is not currently
B. is as of 2013
C. is planned to be in 2014
D. will never be
Answer: A
Q12. What does the following command do with respect to the Amazon EC2 security groups? ec2-revoke RevokeSecurityGroup Ingress
A. Removes one or more security groups from a rule.
B. Removes one or more security groups from an Amazon EC2 instance.
C. Removes one or more rules from a security group.
D. Removes a security group from our account.
Answer: C
Q13. A customer enquires about whether all his data is secure on AWS and is especially concerned about Elastic Map Reduce (EMR) so you need to inform him of some of the security features in place for AWS. Which of the below statements would be an incorrect response to your customers enquiry?
A. Amazon ENIR customers can choose to send data to Amazon S3 using the HTTPS protocol for secure transmission.
B. Amazon S3 provides authentication mechanisms to ensure that stored data is secured against unauthorized access.
C. Every packet sent in the AWS network uses Internet Protocol Security (IPsec).
D. Customers may encrypt the input data before they upload it to Amazon S3.
Answer: C
Explanation:
Amazon S3 provides authentication mechanisms to ensure that stored data is secured against unauthorized access. Unless the customer who is uploading the data specifies otherwise, only that customer can access the data. Amazon EMR customers can also choose to send data to Amazon S3
using the HTTPS protocol for secure transmission. In addition, Amazon EMR always uses HTTPS to send data between Amazon S3 and Amazon EC2. For added security, customers may encrypt the input data before they upload it to Amazon S3 (using any common data compression tool); they then need to add a decryption step to the beginning of their cluster when Amazon EMR fetches the data from Amazon S3. Reference: https://aws.amazon.com/elasticmapreduce/faqs/
Q14. What is an isolated database environment running in the cloud (Amazon RDS) called?
A. DB Instance
B. DB Sewer
C. DB Unit
D. DB Volume
Answer: A
Q15. Does Amazon RDS allow direct host access via Telnet, Secure Shell (SSH), or Windows Remote Desktop Connection?
A. Yes
B. No
C. Depends on if it is in VPC or not
Answer: B