AWS Certified Solutions Architect - Professional Questions and Answers (Dumps and Practice Questions)
Question : Using Elastic Load Balancing in your Amazon VPC, you can
1. balance load between tiers of your application within your VPC
2. specify whether the load balancer is internal to VPC.
3. specify whether the load balancer is internet-facing .
4. Only 1 and 2
5. 1,2 and 3
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Explanation: Elastic Load Balancing makes it easy to create an internet-facing entry point into your VPC or to balance load between tiers of your application within your VPC. You can assign
security groups to your ELB to control which ports are open to a list of allowed sources. Because Elastic Load Balancing is attached to your VPC, all of your existing Network Access
Control Lists (ACL's) and Routing Tables continue to provide additional network controls.
When you create a load balancer in your VPC, you can specify whether the load balancer is internet-facing (the default) or internal. If you select internal, you do not need to have
an internet gateway to reach the load balancer, and the private IP addresses of the load balancer will be used in the load balancer's DNS record.
Question : You already know that the website you are going to re-launch on new servers will have millions of hits everyday. Hence, you need reserved instance
with known capacity for that you chose all upfront payment method. Now after launching the Reserved Instance you wish to change the aavailability zone. Which of '
the following is correct statement.
1. If you change the Availability Zone of an RI, its capacity reservation and pricing benefits no longer apply to the original
Availability Zone and start applying to usage in the new Availability Zone.
2. If you change the Availability Zone of an RI, its capacity reservation no longer apply to the original
Availability Zone and start applying to usage in the new Availability Zone.
3. If you change the Availability Zone of an RI, its capacity reservation and pricing benefits will apply to the original
Availability Zone as wel as in the new Availability Zone.
4. None of above
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Explanation: Reserved Instances provide you with a capacity reservation, so you can have confidence that you will be able to launch the instances you have reserved when you need them. There
are three RI payment options (No Upfront, Partial Upfront, All Upfront) that enable you to balance the amount you pay upfront with your effective hourly price.
If you change the Availability Zone of an RI, its capacity reservation and pricing benefits no longer apply to the original Availability Zone and start applying to usage in the new
Availability Zone. If you modify the Network Platform of a RI, its capacity reservation no longer applies to the original Network Platform and starts applying to usage with the new
Network Platform. Pricing benefits continue to apply to both EC2-Classic and EC2-VPC instance usage matching the rest of the RI parameters.
Question : You already know that the website you are going to re-launch on new servers will have millions of hits everyday. Hence, you need reserved instance
with known capacity for that you chose all upfront payment method.As you know you server is already running with lesser capacity, can you upgrade the same server
with RI ?
1. No, You can not
2. Yes, you can
3. It depend which AZ you are using
4. Yes, you can but you need to re-start the server after paying RI fee upfront.
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Explanation: RI modifications are processed as soon as possible but may take up-to 2 hours. If the modification succeeds, the new capacity reservation becomes effective immediately and the
new pricing benefit starts applying to matching instance usage at the beginning of the current hour. For example, if your RI is successfully modified at 11:15, the new capacity
reservation starts applying at 11:15 but the pricing benefit will apply retroactively to matching instance usage starting from 11:00. (However, if you request to modify your RIs in
the last hour of a month, your changes become effective in the first hour of the next month.)
When you purchase an RI you specify the Availability Zone in which you want to reserve capacity for instances. In order to use your RI, ensure that you launch your instance in the
same Availability Zone. Additionally, you can purchase an RI in an Availability Zone where you already have a running instance, and the RI will automatically get applied to existing
instance(s).You cannot cancel your RI and the one-time payment is not refundable.
Related Questions
Question : An organization is planning to setup Wordpress on the AWS VPC. The organization needs automated HA and DR along with an
high security standard. Which of the below mentioned configurations satisfies the organization's requirement?
1. Create two separate VPCs and run RDS. RDS will have the multi AZ feature enabled which spans across these two VPCs using VPC peering. Setup the App server with one of
the public subnets of any VPC.
2. Create a VPC with one private and one public subnet in separate AZs. Setup the EC2 instance with a DB in the private subnet and the web application in a public subnet.
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in the public subnet.
4. Create two separate VPCs in different zones. Setup two EC2 instances by installing a DB in the two different VPCs and enable the failover mechanism. Setup the App server with one of the public subnets of any VPC.
Question : An organization is planning to host an application on the AWS VPC. The organization wants dedicated instances. However, an AWS consultant advised the
organization not to use dedicated instances with VPC as the design has a few limitations. Which of the below mentioned statements is not a limitation of dedicated
instances with VPC?
1. All instances launched with this VPC will always be dedicated instances and the user cannot use a default tenancy model for them.
2. The EBS volume will not be on the same tenant hardware as the EC2 instance though the user has configured dedicated tenancy.
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4. The user cannot use Reserved Instances with a dedicated tenancy model.
Question : An application is running on AWS EC. The application has no usage (almost zero load) between PM to AM and AM to PM. The application
experiences higher CPU utilization between 8 AM to 10 AM and 7 PM to 9 PM. Which of the below mentioned EC2 configurations will be more helpful and
cost effective in this scenario?
1. Use EC2 with the spot instance model to scale up and down using Auto Scaling.
2. Use EC2 with Auto Scaling which will scale up when the load increases.
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4. Use EC2 with ELB which distributes the higher load effectively.
Question : A customer has a website which shows all the deals available across the market. The site experiences a load of large EC instances generally.
However, a week before Thanksgiving vacation they encounter a load of almost 20 large instances. The load during that period varies over the day based on
the office timings. Which of the below mentioned solutions is cost effective as well as help the website achieve better performance?
1. Keep only 10 instances running and manually launch 10 instances every day during office hours.
2. Setup to run 10 instances during the pre-vacation period and only scale up during the office time by launching 10 more instances using the AutoScaling schedule.
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4. During the pre-vacation period setup a scenario where the organization has 15 instances running and 5 instances to scale up and down using Auto Scaling based on the
network I/O policy.
Question : QuickTechie.com has created multiple components of a single application for compartmentalization. Currently all the components are hosted on a single EC instance.
Due to security reasons QuickTechie wants to implement two separate SSLs for the separate modules although it is already using VPC.
How can the organization achieve this with a single instance?
1. Create a VPC instance which will have multiple network interfaces with multiple elastic IP addresses.
2. You have to launch two instances each in a separate subnet and allow VPC peering for a single IP.
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4. Create a VPC instance which will have multiple subnets attached to it and each will have a separate IP address.
Question : Acmeshell.com is planning to create a secure scalable application with AWS VPC and ELB and has two instances already running and each instance has an
ENI attached to it in addition to a primary network interface. The primary network interface and additional ENI both have an elastic IP attached to it.
If those instances are registered with ELB and Acmeshell wants ELB to send data to a particular EIP of the instance, how can they achieve this?
1. Acmeshell should ensure that the IP which is required to receive the ELB traffic is attached to an additional ENI.
2. It is not possible to attach an instance with two ENIs with ELB as it will give an IP conflict error.
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4. Acmeshell should ensure that the IP which is required to receive the ELB traffic is attached to a primary network interface.