Content ITV PRO
This is Itvedant Content department
Getting started with Computing
Beyond Servers: Architecting Modern Web Apps
Learning Outcome
5
List major features and benefits of Lambda
4
Identify key Lambda components
3
Understand AWS Lambda and Serverless concept
2
Explain how Elastic Beanstalk works at a high level
1
Understand what AWS Elastic Beanstalk is
Earlier, we learned that
AWS Elastic Beanstalk
Elastic Beanstalk is a Platform as a Service (PaaS)
Used to deploy web applications easily
AWS automatically handles
Server setup
Scaling
Load balancing
AWS Elastic Beanstalk : Implementation
Upload application code
Choose programming platform
AWS creates required resources
Application is deployed
AWS monitors and scales automatically
AWS Lambda
AWS Lambda runs code without managing servers (serverless).
Each execution can run for a maximum of 15 minutes
Cost-effective — pay only for the time your code runs
Lambda Destinations
Lambda Destinations send execution results to other AWS services
Targets: SQS, SNS, EventBridge, or another Lambda
Used for event handling, workflows, and error processing.
AWS Lambda Functions & Automation
Lambda functions are serverless programs that run automatically in response to events without managing servers.
Real-World Example: EC2 Automation Using AWS Lambda
A company runs a development server on an EC2 instance that is needed only during office hours.
Trigger
An Amazon EventBridge schedule starts the instance at 9 AM and stops it at 6 PM
Action
AWS Lambda automatically calls the EC2 API to start and stop the instance at the scheduled times
Benefit
The company saves cost by paying for EC2 only when employees are actually using the server
What is Serverless Computing?
Servers exist but are fully managed by AWS
Developer does not worry about
Hardware
Operating System (OS)
Scaling
Availability, maintenance, and server management
Pay only for execution time
AWS Lambda Components
A function is a small unit of code
Designed to perform one task
Runs independently
Examples
Python
Java
Node js
Go
Ruby
Events & Triggers
Events
Something that happens in AWS
Examples: file upload to S3, API request, database update, scheduled time
Trigger
Connects the event to the Lambda function
Automatically invokes Lambda when the event occurs
No manual execution required
Execution Behavior
Runs code instantly when triggered
Scales automatically based on incoming events
Supports real-time and scheduled processing
AWS Lambda: Features & Benefits
Features
No server management
Automatic scaling
High availability
Benefits
Cost efficient
Faster development
Easy maintenance
Summary
3
AWS manages infrastructure
2
Lambda enables serverless execution
1
Elastic Beanstalk simplifies application deployment
Quiz
AWS Lambda is known as which type of service?
A. Serverless compute service
B. Storage service
C. Database service
D. Networking service
Quiz-Answer
AWS Lambda is known as which type of service?
A. Serverless compute service
B. Storage service
C. Database service
D. Networking service
Beyond Servers: Architecting Modern Web Apps
By Content ITV
