Under a single AWS account, you have set up an Auto Scaling group with a maximum capacity of 50 Amazon Elastic Compute Cloud (Amazon EC2) instances in us-west-2.When you scale out, however, it only increases to 20 Amazon EC2 instances. What is the likely cause?
A. Auto Scaling has a hard limit of 20 Amazon EC2 instances.
B. If not specified, the Auto Scaling group maximum capacity defaults to 20 Amazon
C. The Auto Scaling group desired capacity is set to 20, so Auto Scaling stopped at 20
Amazon EC2 instances.
D. You have exceeded the default Amazon EC2 instance limit of 20 per region.
Answer – D. Auto Scaling may cause you to reach limits of other services, such as the default number of Amazon EC2 instances you can currently launch within a region, which is 20.
The AWS Certified Solutions Architect—Associate exam is intended for people who have
experience in designing distributed applications and systems on the AWS platform. Here are
some of the key exam topics that you should understand for this exam:
Designing and deploying scalable, highly available, and fault-tolerant systems on AWS
Migrating existing on-premises applications to AWS
Ingress and egress of data to and from AWS
Selecting the appropriate AWS service based on data, compute, database, or security
Identifying appropriate use of AWS architectural best practices
Estimating AWS costs and identifying cost control mechanisms
In general, candidates should have the following:
One or more years of hands-on experience designing highly available, cost efficient,
secure, fault tolerant, and scalable distributed systems on AWS
In-depth knowledge of at least one high-level programming language
Ability to identify and define requirements for an AWS-based application
Experience with deploying hybrid systems with on-premises and AWS components
Capability to provide best practices for building secure and reliable applications on the
The exam covers four different domains, with each domain broken down into objectives and sub objectives.
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