Assessment Test Flashcards
True/false: The Developer Support plan provides access to a support application programming interface (API).
True
False
B. The Business plan offers access to a support API, but the Developer plan does not. See Chapter 1 for more information.
True/false: AWS is responsible for managing the network configuration of your EC2 instances.
True
False
B. Customers are responsible for managing the network configuration of EC2 instances. AWS is responsible for the physical network infrastructure. See Chapter 1 for more information.
Which of the following services is most useful for decoupling the components of a monolithic application?
SNS
KMS
SQS
Glacier
C. Simple Queue Service (SQS) allows for event‐driven messaging within distributed systems that can decouple while coordinating the discrete steps of a larger process. See Chapter 1 for more information.
An application you want to run on EC2 requires you to license it based on the number of physical CPU sockets and cores on the hardware you plan to run the application on. Which of the following tenancy models should you specify?
Dedicated host
Dedicated instance
Shared tenancy
Bring your own license
A.The dedicated host option lets you see the number of physical CPU sockets and cores on a host. See Chapter 2 for more information.
True/false: Changing the instance type of an EC2 instance will change its elastic IP address.
True
False
B. An elastic IP address will not change. A public IP address attached to an instance will change if the instance is stopped, as would happen when changing the instance type. See Chapter 2 for more information.
True/false: You can use a Quick Start Amazon Machine Image (AMI) to create any instance type.
True
False
A.A Quick Start AMI is independent of the instance type. See Chapter 2 for more information.
Which S3 encryption option does not require AWS persistently storing the encryption keys it uses to decrypt data?
Client‐side encryption
SSE‐KMS
SSE‐S3
SSE‐C
D.With SSE‐C you provide your own keys for Amazon to use to decrypt and encrypt your data. AWS doesn’t persistently store the keys. See Chapter 3 for more information.
True/false: Durability measures the percentage of likelihood that a given object will not be inadvertently lost by AWS over the course of a year.
True
False
A. Durability corresponds to an average annual expected loss of objects stored on S3, not including objects you delete. Availability measures the amount of time S3 will be available to let you retrieve those objects. See Chapter 3 for more information.
True/false: After uploading a new object to S3, there will be a slight delay (one to two seconds) before the object is available.
True
False
B. S3 uses a read‐after‐write consistency model for new objects, so once you upload an object to S3, it’s immediately available. See Chapter 3 for more information.
You created a Virtual Private Cloud (VPC) using the Classless Inter‐Domain Routing (CIDR) block 10.0.0.0/24. You need to connect to this VPC from your internal network, but the IP addresses in use on your internal network overlap with the CIDR. Which of the following is a valid way to address this problem?
Remove the CIDR and use IPv6 instead.
Change the VPC’s CIDR.
Create a new VPC with a different CIDR.
Create a secondary CIDR for the VPC.
C. You can’t change the primary CIDR for a VPC, so you must create a new one to connect it to your internal network. See Chapter 4 for more information.
True/false: An EC2 instance must be in a public subnet to access the Internet.
True
False
B. An EC2 instance can access the Internet from a private subnet provided it uses a NAT gateway or NAT instance. See Chapter 4 for more information.
True/false: The route table for a public subnet must have a default route pointing to an Internet gateway as a target.
True
False
A. The definition of a public subnet is a subnet that has a default route pointing to an Internet gateway as a target. Otherwise, it’s a private subnet. See Chapter 4 for more information.
Which of the following use cases is well suited for DynamoDB?
Running a MongoDB database on AWS
Storing large binary files exceeding 1 GB in size
Storing JSON documents that have a consistent structure
Storing image assets for a website
C. DynamoDB is a key‐value store that can be used to store items up to 400 KB in size. See Chapter 5 for more information.
True/false: You can create a DynamoDB global secondary index for an existing table at any time.
True
False
A.You can create a global secondary index for an existing table at any time. You can create a local secondary index only when you create the table. See Chapter 5 for more information.
True/false: Enabling point‐in‐time RDS snapshots is sufficient to give you a recovery point objective (RPO) of less than 10 minutes.
True
False
A. Enabling point‐in‐time recovery gives you an RPO of about five minutes. The recovery time objective (RTO) depends on the amount of data to restore. See Chapter 5 for more information.