AWS Services Quiz SKG

What happens when an Amazon EC2 instance is terminated?

• Data stored on EBS volumes is automatically backed up

• The instance is stopped but can be restarted later

• The associated Elastic IP is automatically detached

• The root volume of the instance is deleted unless configured otherwise

Answer explanation

When an Amazon EC2 instance is terminated, the root volume is deleted by default unless you have configured it to be retained. This means any data on the root volume will be lost unless backed up separately.

Which service helps in distributing incoming traffic across multiple EC2 instances?

• Amazon CloudWatch

• Amazon Route 53

• AWS Load Balancer

• AWS Shield

Answer explanation

AWS Load Balancer is designed to distribute incoming traffic across multiple EC2 instances, ensuring high availability and reliability. Other options like CloudWatch and Route 53 serve different purposes.

What is the main function of an Elastic Load Balancer (ELB)?

• To monitor CPU utilization of EC2 instances

• To distribute incoming application traffic across multiple targets

• To create backups for Amazon RDS databases

• To store and retrieve objects in AWS

Answer explanation

The main function of an Elastic Load Balancer (ELB) is to distribute incoming application traffic across multiple targets, ensuring high availability and reliability of applications.

Which type of Elastic Load Balancer is best suited for applications requiring routing based on HTTP headers and request paths?

• Network Load Balancer

• Classic Load Balancer

• Application Load Balancer

• Gateway Load Balancer

Answer explanation

The Application Load Balancer is designed for advanced routing, including based on HTTP headers and request paths, making it the best choice for applications requiring such features.

What protocol does a Network Load Balancer use to handle requests?

• TCP/UDP

• HTTP/HTTPS

• ICMP

• FTP

Answer explanation

A Network Load Balancer operates at the transport layer and uses TCP/UDP protocols to efficiently distribute incoming traffic across multiple servers, ensuring high availability and reliability.

Which AWS service can be used in combination with an Elastic Load Balancer to handle application scaling?

• AWS Auto Scaling

• AWS Lambda

• Amazon CloudFront

• Amazon S3

Answer explanation

AWS Auto Scaling works with Elastic Load Balancers to automatically adjust the number of EC2 instances based on demand, ensuring your application can scale efficiently.

What does an Elastic Load Balancer do when one of the EC2 instances it routes traffic to becomes unhealthy?

• It continues to send traffic to the unhealthy instance

• It automatically replaces the unhealthy instance

• It stops sending traffic to the unhealthy instance and reroutes it to healthy instances

• It restarts the unhealthy instance

Answer explanation

An Elastic Load Balancer detects unhealthy EC2 instances and stops routing traffic to them, ensuring that only healthy instances receive traffic. This maintains application availability and performance.

What type of storage does Amazon S3 provide?

• Block storage

• File storage

• Object storage

• Cache storage

Answer explanation

Amazon S3 provides object storage, which allows users to store and retrieve data as objects. This is different from block or file storage, making it ideal for unstructured data like images, videos, and backups.

Which S3 storage class is best for long-term archival storage with infrequent access?

• S3 Standard

• S3 One Zone-IA

• S3 Glacier

• S3 Intelligent-Tiering

Answer explanation

S3 Glacier is designed specifically for long-term archival storage with infrequent access. It offers lower costs compared to other classes, making it ideal for data that is rarely accessed but needs to be retained.

What is the maximum size of a single object that can be uploaded to Amazon S3 in a single PUT operation?

• 5 MB

• 5 GB

• 50 GB

• 100 GB

Answer explanation

The maximum size for a single object uploaded to Amazon S3 in a single PUT operation is 5 GB. This limit allows users to efficiently upload large files without needing to use multipart uploads.