Incorrect Answers - Practice Exams Flashcards
What is the throughput quota for an Amazon SQS FIFO queue?
By default, FIFO queues support up to 3,000 messages per second with batching or up to 300 messages per second (300 send, receive, or delete operations per second) without batching.
What is Amazon RDS Custom?
Amazon RDS Custom is a managed database service for legacy, custom, and packaged applications that require access to the underlying operating system and database environment. Amazon RDS Custom automates setup, operation, and scaling of databases in the cloud while granting customers access to the database and underlying operating system to configure settings, install patches, and enable native features to meet the dependent application’s requirements.
What is AWS Global Accelerator?
AWS Global Accelerator is a networking service that helps you improve the availability and performance of the applications that you offer to your global users. AWS Global Accelerator is easy to set up, configure, and manage. It provides static IP addresses that provide a fixed entry point to your applications and eliminate the complexity of managing specific IP addresses for different AWS Regions and Availability Zones. AWS Global Accelerator always routes user traffic to the optimal endpoint based on performance, reacting instantly to changes in application health, your user’s location, and policies that you configure.
What is the difference between Cognito user pools and identity pools?
User pools are for authentication (identity verification). With a user pool, your app users can sign in through the user pool or federate through a third-party identity provider (IdP).
Identity pools are for authorization (access control). You can use identity pools to create unique identities for users and give them access to other AWS services.
What is the difference between AWS ASG Launch Templates and Launch Configurations?
Launch templates (LTs) are newer than launch configurations (LCs) and provide more options to work with. Thus, the AWS documentation recommends use of launch templates (LTs) over launch configuration (LCs):
One of the practical key differences between LT and LC is the fact that LC is immutable. Once you define it, you can’t edit it. Only a replacement is an option. However, a single LT can have multiple versions:
defining a launch template instead of a launch configuration allows you to have multiple versions of a template. With versioning, you can create a subset of the full set of parameters and then reuse it to create other templates or template versions.
Also LTs provide more EC2 options for you to configure, for example, dedicated hosting can be set only using a LT. Similarly, ability to use T2 unlimited burst credit option is only available in a LT.
What is VPC sharing?
VPC sharing allows multiple AWS accounts to create their application resources, such as Amazon EC2 instances, Amazon Relational Database Service (RDS) databases, Amazon Redshift clusters, and AWS Lambda functions, into shared, centrally-managed virtual private clouds (VPCs).
What is Amazon Neptune?
Amazon Neptune is a fast, reliable, fully managed graph database service that makes it easy to build and run applications that work with highly connected datasets.
How can auto scaling be implemented for the ECS cluster instances?
Using a Capacity Provider that is associated with an Auto Scaling Group (ASG)
What is Amazon S3 Transfer Acceleration?
Amazon S3 Transfer Acceleration enables fast, easy, and secure transfers of files over long distances between your client and your Amazon S3 bucket. Transfer Acceleration leverages Amazon CloudFront’s globally distributed AWS Edge Locations. As data arrives at an AWS Edge Location, data is routed to your Amazon S3 bucket over an optimized network path.
Is it possible to enable the hibernation mode on a running EC2 instance?
It is not possible to enable or disable hibernation for an instance after it has been launched.
What is the allowed block size in VPC (CIDR range)?
The allowed block size in VPC is between a /16 netmask (65,536 IP addresses) and /28 netmask (16 IP addresses) and not /27 netmask.
What are Service control policies?
Service control policies (SCPs) are a type of organization policy that you can use to manage permissions in your organization.
What is Expedited retrievals in S3 Glacier?
Expedited retrievals allow you to quickly access your data when occasional urgent requests for a subset of archives are required. For all but the largest archives (250 MB+), data accessed using Expedited retrievals are typically made available within 1–5 minutes.
