AWS technology fundamentals VPC, EC2, S3
1.What is AWS and what are its core services?
AWS stands for Amazon Web Services and it is a cloud computing platform. Its core services include Amazon Elastic Compute Cloud (EC2), Amazon Simple Storage Service (S3), Amazon Virtual Private Cloud (VPC), Amazon Relational Database Service (RDS), and Amazon Simple Queue Service (SQS).
2.What is Amazon EC2 and what are its benefits?
Amazon EC2 (Elastic Compute Cloud) is a web service that provides resizable computing capacity in the cloud. It allows users to launch virtual servers, configure security and network settings, and manage storage. The benefits of EC2 include scalability, reliability, and cost-effectiveness.
3.What is Amazon S3 and what is it used for?
Amazon S3 (Simple Storage Service) is an object storage service that provides scalable and durable storage for data on the cloud. It is widely used for data backup, disaster recovery, and archiving.
4.What is Amazon VPC and why is it important?
Amazon VPC (Virtual Private Cloud) is a virtual network that provides secure and isolated environment for resources deployed on the AWS Cloud. It is important because it allows users to control the accessibility and security of their resources deployed on the AWS Cloud, and also helps to maintain compliance with data privacy and security regulations.
5.What is the main difference between an Amazon VPC and a traditional data center?
The main difference between an Amazon VPC and a traditional data center is that a VPC provides a virtual environment on the cloud while a data center provides a physical environment. A VPC is scalable, flexible, and cost-effective, while a data center requires significant upfront investment, is more difficult to scale, and is less flexible.
6.What is Amazon S3 Standard Infrequent Access (S3 Standard-IA) and when is it used?
Amazon S3 Standard Infrequent Access (S3 Standard-IA) is a storage class in Amazon S3 that provides low-cost storage for data that is not accessed frequently, but still requires rapid access when needed. It is used for data archiving and long-term backup solutions where low storage cost is a priority and retrieval performance is less critical.
7.What are the different types of EC2 instances and when should each be used?
There are various types of EC2 instances, including General Purpose, Compute Optimized, Memory Optimized, Storage Optimized, and GPU instances. The type of instance used will depend on the specific requirements of the application or workload. For example, Memory Optimized instances are ideal for in-memory databases and high-performance computing, while Storage Optimized instances are designed for high I/O workloads like big data processing.
8.What is Amazon CloudFront and what is it used for?
These are just a few additional questions that you may encounter in an AWS Certified Cloud Practitioner interview. The AWS certification covers a broad range of topics, so it is important to be familiar with the fundamentals of cloud computing and AWS services.
9.What is Amazon Elastic Block Store (EBS) and what are its benefits?
Amazon Elastic Block Store (EBS) is a block-level storage service for use with Amazon EC2 instances. EBS provides persistent storage for data and is ideal for use cases such as databases, file systems, and big data processing. The benefits of EBS include high performance, high availability, and the ability to scale storage independently from the EC2 instance.
10.What is Amazon RDS and what is it used for?
Amazon RDS (Relational Database Service) is a managed database service that makes it easy to set up, operate, and scale relational databases in the cloud. It supports popular database engines such as Amazon Aurora, PostgreSQL, MySQL, Microsoft SQL Server, and Oracle. Amazon RDS is used for a variety of use cases, including web and mobile applications, data warehousing, and online transaction processing.
11.What is Amazon SQS and what is it used for?
Amazon SQS (Simple Queue Service) is a fully managed message queuing service that enables decoupled communication between distributed application components. It is used for asynchronous communication and helps to ensure that messages are delivered in order, without duplicates, and with a consistent level of reliability. Common use cases for SQS include message-driven architectures, background job processing, and event-driven systems.
12.What is the Amazon Global Infrastructure and what are its benefits?
The Amazon Global Infrastructure is a network of data centers that provides low latency and high throughput for Amazon Web Services. The benefits of the Amazon Global Infrastructure include high availability, reliability, and scalability. The infrastructure is designed to provide global reach and fast performance for users around the world, and it supports the deployment of applications and services in multiple regions for disaster recovery and business continuity.
13.What is Amazon S3 Transfer Acceleration and how does it work?
Amazon S3 Transfer Acceleration is a feature of Amazon S3 that enables fast, easy, and secure transfers of large files over the Internet. It works by uploading files to an Amazon CloudFront edge location, which then transfers the data to Amazon S3 over Amazon’s high-speed network. This results in faster uploads compared to directly uploading the data to Amazon S3, especially for users who are located far from an S3 region.
14.What is Amazon Elastic Compute Cloud (EC2) Auto Scaling and why is it important?
Amazon EC2 Auto Scaling is a service that automatically adds or removes EC2 instances based on demand. It helps ensure that your application has the right amount of resources to handle changes in demand without manual intervention. Auto Scaling is important for ensuring that your applications are highly available, scalable, and cost-effective, especially in unpredictable workloads.
15.What is Amazon Route 53 and what is it used for?
Amazon Route 53 is a highly available and scalable domain name system (DNS) service. It is used to route end-users to Internet applications by translating human-readable domain names into IP addresses. Route 53 can also be used to check the health of your resources and automatically route traffic away from unhealthy resources to healthy ones, providing high availability for your applications.
16.What is Amazon S3 object versioning and why is it important?
Amazon S3 object versioning is a feature that enables you to store multiple versions of an object in the same S3 bucket. This allows you to preserve, retrieve, and restore previous versions of your data in the event of unintended deletion or overwriting. Object versioning is important for ensuring data durability, as well as for tracking changes to your data over time.
17.What is Amazon Virtual Private Cloud (VPC) and why is it important?
Amazon Virtual Private Cloud (VPC) is a logically isolated section of the AWS Cloud where you can launch AWS resources in a virtual network that you define. VPC provides security and isolation for your resources, enabling you to control access to your resources and the traffic between them. It is important for securely deploying and isolating resources in the cloud, as well as for creating isolated environments for development, testing, and production.
18.What is Amazon EC2 and what are its benefits?
Amazon Elastic Compute Cloud (EC2) is a web service that provides scalable computing capacity in the AWS Cloud. EC2 allows you to launch virtual machines (instances) with different configurations of CPU, memory, storage, and networking resources. The benefits of EC2 include high scalability, low cost, and the ability to run a wide variety of operating systems and applications.
19.What is Amazon S3 and what are its benefits?
Amazon Simple Storage Service (S3) is an object storage service that offers industry-leading scalability, data availability, security, and performance. S3 provides unlimited storage capacity and enables you to store and retrieve any amount of data, at any time, from anywhere on the web. The benefits of S3 include low cost, high durability, and easy management of data.
20.What is Amazon CloudFront and what is it used for?
21.What is Amazon Elastic Block Store (EBS) and what is it used for?
Amazon Elastic Block Store (EBS) is a block-level storage service for use with Amazon EC2 instances. EBS provides raw block-level storage that can be attached to a single EC2 instance, and it is used for a variety of use cases, such as storing data for applications, databases, and file systems. EBS also offers multiple performance and storage options, allowing you to tailor your storage solution to your specific needs.
22.What is Amazon Elastic Load Balancing (ELB) and what is it used for?
Amazon Elastic Load Balancing (ELB) is a service that automatically distributes incoming application traffic across multiple targets, such as EC2 instances, containers, and IP addresses. ELB helps ensure that your applications are highly available and scalable, and it also helps to reduce the impact of failures or spikes in traffic. ELB is used for a variety of use cases, such as load balancing incoming traffic to EC2 instances, and providing increased availability for web and mobile applications.
23.What is Amazon Relational Database Service (RDS) and what is it used for?
Amazon Relational Database Service (RDS) is a fully managed relational database service that makes it easy to set up, operate, and scale a relational database in the cloud. RDS supports popular database engines, such as Amazon Aurora, MySQL, MariaDB, Microsoft SQL Server, Oracle, and PostgreSQL, and it provides features such as automated backups, software patching, and monitoring. RDS is used for a variety of use cases, such as powering web and mobile applications, running OLAP and OLTP databases, and serving as the data store for business intelligence applications.
24.What is Amazon CloudWatch and what is it used for?
Amazon CloudWatch is a monitoring service for AWS resources and the applications you run on the AWS Cloud. CloudWatch provides data and operational insights for resources, such as EC2 instances and RDS databases, as well as custom metrics generated by your applications and services, and logs. CloudWatch can be used to monitor your resources and applications, set alarms, and take automated actions in response to changes in your resources.
25.What is Amazon Auto Scaling and what is it used for?
Amazon Auto Scaling is a service that enables you to automatically scale your Amazon EC2 capacity up or down in response to changes in demand for your applications. Auto Scaling helps ensure that your applications are highly available and scalable, and it helps you to minimize costs by only using the EC2 capacity that you need. Auto Scaling is used for a variety of use cases, such as adjusting the number of EC2 instances in response to changes in demand for a web application, or ensuring that you always have enough EC2 capacity to run your critical applications.
26.What is Amazon Route 53 and what is it used for?
Amazon Route 53 is a highly available and scalable domain name system (DNS) web service. Route 53 provides a reliable and cost-effective way to route end-users to Internet applications by translating domain names into the numeric IP addresses that computers use to connect to each other. Route 53 is used for a variety of use cases, such as routing traffic for websites, providing DNS service for custom domains, and serving as the foundation for creating scalable and highly available applications in the cloud.
27.What is Amazon SNS and what is it used for?
Amazon Simple Notification Service (SNS) is a flexible, fully managed publish/subscribe messaging service for loosely-coupled microservices, distributed systems, and serverless applications. SNS makes it easy to send messages to a large number of subscribers, including email addresses, mobile devices, HTTP/HTTPS endpoints, and AWS Lambda functions, and it supports fan-out delivery to multiple endpoints. SNS is used for a variety of use cases, such as sending push notifications to mobile devices, delivering messages to multiple subscribers in parallel, and fanning out messages to multiple Lambda functions.
28.What is Amazon SQS and what is it used for?
Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables decoupled communication between distributed application components. SQS eliminates the complexity and overhead associated with managing and operating message oriented middleware, and it provides a reliable, highly scalable, and flexible solution for transferring messages between distributed application components. SQS is used for a variety of use cases, such as decoupling sending and processing of messages, processing messages in parallel, and buffering messages to help smooth out spikes in incoming traffic.