aws_lambda_flashcards

Question 1

Term

Answer 1

Definition

Question 2

AWS Lambda

Answer 2

Serverless compute service that runs your code in response to triggers without managing servers - you just upload code and it executes

Question 3

Serverless Computing

Answer 3

Running code without provisioning or managing servers - AWS handles all the infrastructure so you focus on code

Question 4

Lambda Function

Answer 4

The actual code package you upload to Lambda that executes when triggered - contains your business logic

Question 5

Triggers

Answer 5

Events that cause Lambda functions to execute - can be HTTP requests or AWS service events

Question 6

Code (Lambda context)

Answer 6

Your actual business logic written in supported languages like Python or Node.js that gets executed

Question 7

Underlying Compute Resources

Answer 7

The servers and infrastructure AWS manages for you - you never see or configure these directly

Question 8

Run Your Code

Answer 8

Lambda executes your function when triggered - handles all the compute automatically

Question 9

Scale Your Code

Answer 9

Lambda automatically adds or removes compute capacity based on incoming requests - no manual scaling needed

Question 10

High Availability

Answer 10

Lambda runs across multiple availability zones automatically - built-in redundancy without configuration

Question 11

Lambda Code Editor

Answer 11

Web-based IDE in AWS console for writing and editing Lambda functions directly

Question 12

HTTP Endpoints

Answer 12

API Gateway URLs that trigger Lambda functions for web services - creates REST APIs

Question 13

In-app Activity

Answer 13

Events within applications that can trigger Lambda functions - like mobile app actions

Question 14

Scheduled Triggers

Answer 14

CloudWatch Events/EventBridge rules that run Lambda on a schedule - like cron jobs

Question 15

No Servers to Manage

Answer 15

You never provision EC2 instances or manage operating systems - AWS handles everything

Question 16

Continuous Scaling

Answer 16

Lambda automatically scales from zero to thousands of concurrent executions instantly

Question 17

Trigger-1 Trigger-2 Process

Answer 17

Lambda can respond to multiple trigger types and process them with the same or different functions

Question 18

Subsecond Metering

Answer 18

You’re billed in 1ms increments only for actual compute time used - not idle time

Question 19

Pay Only for What You Use

Answer 19

No charges when code isn’t running - only pay for requests and compute duration

Question 20

Pricing Based on Requests

Answer 20

Charged per million requests to invoke your functions

Question 21

Duration-based Pricing

Answer 21

Charged for compute time in GB-seconds - memory allocated times execution duration

Question 22

Time Increments of 1ms

Answer 22

Billing calculated down to the millisecond for precise cost optimization

Question 23

Code Not Running = $0.00

Answer 23

Zero charges when Lambda functions are idle - no minimum fees or idle costs

Question 24

AWS Lambda Triggers (Examples)

Answer 24

Various AWS services that can invoke Lambda functions through events

Question 25

S3 Trigger

Answer 25

Lambda executes when objects are created or modified in S3 buckets - process uploads automatically

Question 26

SNS Trigger

Answer 26

Lambda processes messages from Simple Notification Service topics - handle notifications and alerts

Question 27

SQS Trigger

Answer 27

Lambda polls and processes messages from Simple Queue Service - handle async message processing

Question 28

DynamoDB Trigger

Answer 28

Lambda processes stream records when items change in DynamoDB tables - react to database changes

Question 29

API Gateway Trigger

Answer 29

Lambda handles HTTP/REST API requests - build serverless web services and APIs

Question 30

CloudWatch/EventBridge Schedule

Answer 30

Lambda runs on defined schedules - replace traditional cron jobs with serverless scheduling

Question 31

Upload Code to Lambda

Answer 31

Deploy function code via console zip upload or CLI/SDK - supports direct upload or S3 reference

Question 32

Set Up Code to Trigger

Answer 32

Configure event sources that invoke your function - connect triggers to Lambda

Question 33

Lambda Ready to Run

Answer 33

Function deployed and waiting for triggers - no pre-warming needed

Question 34

Just Pay for Compute Time

Answer 34

Only charged for actual execution duration - measured in GB-seconds

Question 35

Lambda Automatically Scales

Answer 35

Handles 1 to 1000s of concurrent executions without configuration - elastic scaling built-in

Question 36

Lambda Automatically Runs Code

Answer 36

Executes immediately when triggered - no startup delays or server provisioning

Question 37

Just Write the Code

Answer 37

Focus only on business logic - no infrastructure code needed

Question 38

Lambda Polls the Queue

Answer 38

For SQS/Kinesis Lambda automatically polls for new messages - handles message retrieval

Question 39

Lambda Invokes Function Synchronously

Answer 39

Executes and waits for response in real-time - for immediate processing needs

Question 40

A DynamoDB Event Created or Modified

Answer 40

Stream record generated when table items change - triggers Lambda for each change

Question 41

An API is Called

Answer 41

HTTP request to API Gateway endpoint triggers associated Lambda function

Question 42

PAL (Process)

Answer 42

Lambda's internal process for handling events - Poll Invoke Process pattern

Question 43

Amazon Simple Storage Service

Answer 43

S3 - object storage that integrates with Lambda for file processing triggers

Question 44

Amazon Simple Notification Service

Answer 44

SNS - pub/sub messaging that can trigger Lambda for event processing

Question 45

Amazon API Gateway

Answer 45

Managed service for creating REST APIs that trigger Lambda functions

Question 46

Amazon DynamoDB

Answer 46

NoSQL database with streams that trigger Lambda on data changes

Question 47

Amazon Simple Queue Service

Answer 47

SQS - message queue service Lambda can poll for async processing

Question 48

Amazon CloudWatch/EventBridge

Answer 48

Services for scheduling and rule-based Lambda triggers - time and event-based execution