Certification Preparation Material
A startup is developing a new application. They don't know how to anticipate the usage or
workload demands for the application. Which benefit of cloud computing will allow the startup
to automatically adjust compute capacity based on demand? - ANS ✔✔Elasticity
With elasticity, the startup doesn't have to plan ahead of time how much capacity they'll need.
Elasticity allows them to match the supply of resources with changing workload demands.
A company is considering a serverless architecture and wants to build and run applications
without having to manage infrastructure. Which AWS services should the company consider
using when building applications? - ANS ✔✔S3
Serverless is a way to build and run applications without having to manage infrastructure. S3 is
considered serverless.
Fargate
Serverless is a way to build and run applications without having to manage infrastructure.
Fargate is considered serverless.
DynamoDB
Serverless is a way to build and run applications without having to manage infrastructure.
DynamoDB is considered serverless.
Lambda
Serverless is a way to build and run applications without having to manage infrastructure.
Lambda is considered serverless.
, A DevOps engineer is planning for the deployment of an application that can't be impacted if an
entire geographic location is affected by a disaster. How can the engineer deploy this
application? - ANS ✔✔Deploy the application to multiple Regions.
AWS logically groups its Regions into geographic locations. Each Region is spread out and fully
independent and isolated from other Regions. If there's a flood, tsunami or earthquake in 1
Region, the other Regions will not be impacted. Because of this, it makes sense to deploy your
application to multiple Regions.
A solutions architect is designing a system to withstand the failure of one or more components.
What type of system is able to withstand failure? - ANS ✔✔Highly available
Highly available systems are designed to operate continuously without failure for a long time.
These systems avoid loss of service by reducing or managing failures.
You're hosting a web application on EC2. After a few days of production usage, you notice the
traffic to the web application far exceeds what was expected. You've decided to move to a larger
instance type. What AWS principle does this represent? - ANS ✔✔Vertical scaling
Vertical scaling is increasing the size and computing power of a single instance or node without
increasing the number of nodes or instances.
A company is receiving automated alerts notifying them that their only production EC2 instance
is continuously reaching 100% CPU utilization. When this happens, customers cannot make
purchases and receive error messages stating they should try again later because all the
company's servers are busy. What should the company implement to ensure their system is
highly available? - ANS ✔✔Horizontal scaling
Horizontal scaling (or scaling out) adds or replaces EC2 instances automatically across AZs,
based on need and changing demand, and is used in the design of systems with high availability.
What is a geographical area of the world that is a collection of logically grouped data centers? -
ANS ✔✔Region
A Region is a geographical area of the world that is a collection of data centers logically grouped
into Availability Zones.