SET #2

You want to use an Amazon EC2 instance for a batch processing workload. What would be the best Amazon EC2 instance type to use?

• General purpose

• Memory optimized

• Compute optimized

• Storage optimized

Answer explanation

The correct response option is Compute optimized.

 

The other response options are incorrect because:

• General purpose instances provide a balance of compute, memory, and networking resources. This instance family would not be the best choice for the application in this scenario. Compute optimized instances are more well suited for batch processing workloads than general purpose instances.

• Memory optimized instances are more ideal for workloads that process large datasets in memory, such as high-performance databases.

• Storage optimized instances are designed for workloads that require high, sequential read and write access to large datasets on local storage. The question does not specify the size of data that will be processed. Batch processing involves processing data in groups. A compute optimized instance is ideal for this type of workload, which would benefit from a high-performance processor.

You have a workload that will run for a total of 6 months and can withstand interruptions. What would be the most cost-efficient Amazon EC2 purchasing option?

• Reserved Instance

• Spot Instance

• Dedicated Instance

• On-Demand Instance

Answer explanation

The correct response option is Spot Instance.

 

The other response options are incorrect because:

• Reserved Instances require a contract length of either 1 year or 3 years. The workload in this scenario will only be running for 6 months.

• Dedicated Instances run in a virtual private cloud (VPC) on hardware that is dedicated to a single customer. They have a higher cost than the other response options, which run on shared hardware.

• On-Demand Instances fulfill the requirements of running for only 6 months and withstanding interruptions. However, a Spot Instance would be the best choice because it does not require a minimum contract length, is able to withstand interruptions, and costs less than an On-Demand Instance.

Which process is an example of Elastic Load Balancing?

• Ensuring that no single Amazon EC2 instance has to carry the full workload on its own

• Removing unneeded Amazon EC2 instances when demand is low

• Adding a second Amazon EC2 instance during an online store’s popular sale

• Automatically adjusting the number of Amazon EC2 instances to meet demand

Answer explanation

The correct response option is Ensuring that no single Amazon EC2 instance has to carry the full workload on its own.

 

Elastic Load Balancing is the AWS service that automatically distributes incoming application traffic across multiple resources, such as Amazon EC2 instances. This helps to ensure that no single resource becomes overutilized.

 

The other response options are all examples of Auto Scaling.

You want to deploy and manage containerized applications. Which service should you use?

• AWS Lambda

• Amazon Simple Notification Service (Amazon SNS)

• Amazon Simple Notification Service (Amazon SNS)

• Amazon Elastic Kubernetes Service (Amazon EKS)

Answer explanation

The correct response option is Amazon Elastic Kubernetes Service (Amazon EKS).

 

Amazon EKS is a fully managed Kubernetes service. Kubernetes is open-source software that enables you to deploy and manage containerized applications at scale.

 

The other response options are incorrect because:

• AWS Lambda is a service that lets you run code without provisioning or managing servers.

• Amazon Simple Queue Service (Amazon SQS) is a service that enables you to send, store, and receive messages between software components through a queue.

• Amazon Simple Notification Service (Amazon SNS) is a publish/subscribe service. Using Amazon SNS topics, a publisher publishes messages to subscribers.

As a system operations resource your focus is to make the best decision within the AWS infrastructure. You are tasked with managing AWS resources, such as EC2 instance types, geographic Regions, VPC management, and capacity planning and forecasting.

Which option is a key cost-effective resource discussed in the Cost Optimization pillar of the AWS Well-Architected Framework?

• A) Appropriate provisioning

• B) Right size

• C) Using Reserved Instances only

• D) Limiting Regions

Answer explanation

Appropriate provisioning is creating and maintaining the underlying AWS resources to support your business needs. You have to be able to manage services to support basic capacity demands, and proper provisioning is the key. When you provision a managed service, you have to comply with the requirements. Those requirements are based on unforeseen changes to normal business operations, overall effort, and time itself.

 

Right sizing is not considered a cost-effective resource. The entire purpose of utilizing AWS resources is your ability to configure right sizing or adaptive resources to your infrastructure.

You have just created an EC2 instance using an AMI that uses a Linux Ubuntu operating system. A security report suggested that the operating system might need to be patched.

How would you classify the operating system that needs to be patched, and whose responsibility is it to patch it?

• A) Guest operating system, and Amazon’s responsibility

• B) Guest operating system, and the customer’s responsibility

• C) AWS-owned operating system, and the customer’s responsibility

• D) AWS-owned operating system, and Amazon’s responsibility

Answer explanation

a guest operating system is the customer’s responsibility to patch. When you create an Amazon Elastic Compute Cloud (EC2) instance using a customer Amazon Machine Image (AMI), you are creating a guest operating system. This guest operating system has to be updated with the latest patches by the customer.

 

Guest operating system with Amazon’s responsibility to patch it is not correct because this is plainly identified as the customer’s responsibility, as specified by the shared responsibility model.

Which of the following statements are FALSE when creating an Amazon S3 bucket? (Choose all that apply.)

• A) The bucket name can be changed after it has been created.

• B) The bucket name cannot be duplicated between accounts.

• C) The bucket name can be duplicated between accounts.

• D) You cannot use uppercase letters in bucket names.

• E) You cannot use underscores in bucket names.

Answer explanation

When you create a bucket within Amazon Simple Storage Service (S3), you must make sure you know the name you are going to use because once you have created that name, it cannot be changed. Bucket names must be unique within Amazon S3. The names can be between 3 and 63 characters long and must start with a lowercase letter or a number. You also cannot create bucket names that resemble IP addresses.

 

• Bucket names cannot be duplicated between accounts. AWS S3 bucket names have to be unique across the entire Amazon S3 infrastructure.

 

• You cannot use underscores in a bucket name.

 

• You cannot use uppercase letters in bucket names.

Which two support cases can you create using AWS Support from the AWS Management Console? (Choose two.)

• A) Change the root account email address

• B) Support plan change

• C) Service limit increase

• D) Closing your account

• E) Account and billing

Answer explanation

You can create three customer support cases using AWS Support:

• Account and billing

• Service limit increase

• Technical support

You cannot create technical support cases if you have a Basic support plan.

To change your support plan, you do not create a customer support case but access Support plans from the AWS Management Console using your root account.

To close your account, you do not create a customer support case but access the Billing and Cost Management console and navigate to the Close Account section.

You do not change the root account email address by creating a customer support case. To change the root account email address, you need to access the Billing and Cost Management console and navigate to the My Account section.

When you create and manage an Amazon RDS environment, there are no setup fees and no minimums to be concerned with.

 

Which option specifies how you would be billed?

• A) Running time

• B) Network time

• C) Dynamic scaling

• D) Listeners

Answer explanation

When you create an Amazon Relational Database Service (RDS) environment you are billed by the running time, instance class, backup storage, database storage allocated, instance class, and data transfers in and out of your Amazon Elastic Compute Cloud (EC2) instance.

 

When you are billed specifically for a running instance, it is classified by the instance hour, which simply means an instance that has been running for one hour. However, if you have an instance that has been running for 10 minutes, then you would still be changed for one full instance hour.

 

You are not charged by how long your EC2 instance is connected to your network. Network time charges do not exist for an Amazon RDS environment as of the time of this writing.

 

Dynamic scaling gives you the ability to create an Auto Scaling policy that can allow you to dynamically add or remove EC2 instances depending on thresholds created by Amazon Cloud Watch. This is not an option related to billing.

 

Listeners are used by load balancers to help evenly distribute traffic accordingly, but their main job is to manage the incoming connections into the load balancer itself. This component is not associated with billing.

Which of the following options would describe a location where an AWS cluster data center is located?

• A) On-premises system

• B) Region

• C) fleet

• D) Endpoint

Answer explanation

When you think of a Region, you understand that it consists of a predetermined set of AWS resources that reside within a very specific geographic area of the world. When you analyze a specific Region, it will break down into having only two Availability Zones (AZs) that make up one individual Region.

 

An on-premises system is not correct because this type of system means that you own the system. It resides within your own datacenter and is not an AWS resource.

 

An endpoint is not correct because this component is usually referred to as a virtual private cloud (VPC) endpoint, which gives you the ability to connect to AWS services from your on-premises system and requires an Internet gateway.

 

A fleet is not correct because this component refers to a set of virtual servers that are used within AWS to add additional resources in processing large amounts of data at a reduced cost from within the Amazon Elastic Compute Cloud (EC2) infrastructure.