What is Amazon EC2?

A web service that provides resizable compute capacity in the cloud. It is designed to make web-scale computing easier for developers.

What are the different types of EC2 instances?

• General Purpose: Balance of compute, memory, and networking resources.
• Compute Optimized: High performance processors for compute-intensive tasks.
• Memory Optimized: Fast performance for workloads that process large datasets in memory.
• Accelerated Computing: Hardware accelerators, or co-processors, to perform functions more efficiently than is possible in software running on CPUs.
• Storage Optimized: High disk throughput and IOPS for storage-intensive tasks.

What is Amazon S3?

Object storage service that offers industry-leading scalability, data availability, security, and performance.

What are the different S3 storage classes and their use cases?

• S3 Standard: General-purpose storage for frequently accessed data.
• S3 Intelligent-Tiering: Automatically optimizes costs by moving data between access tiers.
• S3 Standard-Infrequent Access (SIA): For less frequently accessed data.
• S3 One Zone-Infrequent Access (One Zone-IA): Lower-cost option for less frequently accessed data, but without the same durability as other classes.
• S3 Glacier Instant Retrieval: Archive storage for data that needs immediate access.
• S3 Glacier Flexible Retrieval: Archive storage for data that can tolerate a few hours retrieval time.
• S3 Glacier Deep Archive: The lowest-cost archive storage in the cloud for data that is rarely accessed.

What is Amazon VPC?

Lets you provision a logically isolated section of the AWS Cloud where you can launch AWS resources in a virtual network that you define.

What are the key components of a VPC?

• Subnets: Each subnet must reside entirely within one Availability Zone and cannot span zones.
• Route tables: A route table contains a set of rules, called routes, that are used to determine where network traffic is directed.
• Internet gateway: An Internet gateway is a horizontally scaled, redundant, and highly available VPC component that allows communication between instances in your VPC and the internet.
• Security groups: Act as a virtual firewall for your instance to control incoming and outgoing traffic.
• Network access control lists (NACLs): Act as a firewall for controlling traffic in and out of one or more subnets.

What are the main types of database services offered by AWS?

• Amazon RDS (Relational Database Service)
• Amazon DynamoDB (NoSQL database)
• Amazon Redshift (Data warehouse)
• Amazon ElastiCache (In-memory cache)
• Amazon DocumentDB (MongoDB-compatible document database)
• Amazon Neptune (Graph database)

What is AWS IAM ?

Enables you to manage access to AWS services and resources securely. With IAM, you can create and manage AWS users and groups, and use permissions to allow and deny their access to AWS resources.  

What are the main components of AWS IAM?

• Users
• Groups
• Roles
• Policies

What is AWS CloudTrail?

A service that enables governance, compliance, operational auditing, and risk auditing of your AWS account. With CloudTrail, you can log, continuously monitor, and retain account activity related to actions across   your AWS infrastructure.

What is Amazon Route 53?

A highly available and scalable cloud Domain Name System (DNS) web service.

What are some key features of Route 53?

• Domain name registration
• DNS management
• Health checks
• Traffic routing