Practice Test

True or False: Auto Scaling is one of the services provided by AWS to enhance application performance and costs in real-time.

  • True
  • False

Answer: True

Explanation: AWS Auto Scaling monitors your applications and automatically adjusts capacity requirements to maintain steady, predictable performance at the lowest possible cost.

What is the primary purpose of Auto Scaling in AWS?

  • a. To adjust application capacity in real-time for workloads
  • b. To make your Amazon EC2 instances always available
  • c. To launch or terminate Amazon EC2 instances
  • d. All of the above

Answer: d. All of the above

Explanation: Auto Scaling not only adjusts capacity to maintain steady, predictable performance but also ensures that the instances are always available and manages the launch and termination of instances.

True or False: AWS Auto Scaling only supports applications deployed on Amazon EC2 instances.

  • True
  • False

Answer: False

Explanation: AWS Auto Scaling is not limited to Amazon EC It can also be used with services like Amazon ECS, Amazon DynamoDB, and Amazon Aurora among others.

True or False: In AWS, Auto Scaling cannot respond to changing conditions with automatic adjustments.

  • True
  • False

Answer: False

Explanation: AWS Auto Scaling is designed to adjust conditions automatically to maintain optimum performance at the lowest cost.

In AWS, Auto Scaling does NOT:

  • a. Adjust instances according to business needs
  • b. Provide elasticity to adapt to load changes
  • c. Set policies to control when instances are launched or terminated
  • d. Make irreversible changes to your AWS resources

Answer: d. Make irreversible changes to your AWS resources

Explanation: Auto Scaling does not make irreversible changes. It dynamically adjusts the instances according to traffic patterns and load on your applications.

True or False: Auto Scaling cannot provide high availability.

  • True
  • False

Answer: False

Explanation: Auto Scaling ensures that your application always has the right number of Amazon EC2 instances available to handle the load of your application.

The Auto Scaling Groups (ASG) in AWS:

  • a. Are a collection of EC2 instances
  • b. Define the minimum and maximum number of instances to scale
  • c. Uses the Elastic Load Balancer to distribute traffic
  • d. All of the above

Answer: d. All of the above

Explanation: Auto Scaling Groups in AWS holds all these functionalities to maintain high availability and manage application load efficiently.

Auto Scaling in AWS is a part of:

  • a. Elastic Beanstalk
  • b. Elastic Load Balancing
  • c. EC2 service
  • d. Both a and c

Answer: d. Both a and c

Explanation: AWS Auto Scaling is a component of both Elastic Beanstalk and EC2 services.

True or False: Auto Scaling is a free service provided by AWS.

  • True
  • False

Answer: True

Explanation: AWS Auto Scaling as a service is free, but the resources it manages like EC2 instances or load balancers are chargeable.

True or False: Auto Scaling can only ‘scale out’ and cannot ‘scale in’.

  • True
  • False

Answer: False

Explanation: AWS Auto Scaling can both ‘scale in’ (reduce capacity) and ‘scale out’ (increase capacity) as per the demand.

Interview Questions

1. What is auto scaling in AWS?

Auto scaling in AWS is a feature that allows users to automatically adjust the number of compute resources in a scalable manner based on demand.

2. How does auto scaling provide elasticity?

Auto scaling provides elasticity by dynamically adjusting the number of EC2 instances or containers in response to changing demand, ensuring that resources are available when needed and avoiding over-provisioning.

3. What are the benefits of using auto scaling?

Using auto scaling in AWS helps in ensuring high availability, cost optimization by scaling resources as needed, and maintaining consistent performance in response to varying workloads.

4. Can auto scaling be configured for both scaling out and scaling in?

Yes, auto scaling can be configured for both scaling out (increasing resources as demand grows) and scaling in (reducing resources as demand decreases), ensuring efficient resource management.

5. What is a scaling policy in auto scaling?

A scaling policy in auto scaling determines how and when the auto scaling group should add or remove instances based on predefined conditions like CPU utilization or network traffic.

6. How can auto scaling be triggered in AWS?

Auto scaling can be triggered in response to CloudWatch alarms, scheduled scaling activities, or based on predictive scaling to proactively adjust resources before demand changes

.

7. Can auto scaling support multiple availability zones?

Yes, auto scaling can be configured to distribute instances across multiple availability zones to enhance fault tolerance and ensure high availability of applications.

8. What is the role of Launch Configurations in auto scaling?

Launch Configurations specify the instance type, AMI, security groups, and other configurations for instances launched by auto scaling, simplifying the process of creating new instances

.

9. Does auto scaling work with all types of instances on AWS?

Yes, auto scaling works with a variety of EC2 instance types, including On-Demand, Spot, and Reserved Instances, allowing users to optimize costs based on their needs.

10. How does auto scaling help in responding to traffic spikes?

Auto scaling monitors traffic patterns and automatically adds more instances to handle sudden traffic spikes, ensuring that the application remains responsive and available under high load conditions.

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