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Azure Developer Associate Study Notes

Azure App Service

HTTP-based service for hosting web applications

Domain Weight

Implement Azure compute solutions represents 25-30% of the exam.

App Service Plans

Tier	Features	Scaling
Free/Shared	Dev/test, shared compute	None
Basic	Dedicated compute, custom domains	Manual (3 instances)
Standard	Auto-scale, slots, VNet	Auto (10 instances)
Premium	Enhanced perf, more slots	Auto (30 instances)
Isolated	Dedicated environment	Auto (100 instances)

Deployment Slots

Separate environments with own hostnames
Swap slots for zero-downtime deployments
Slot-specific settings: connection strings, app settings
Auto-swap available for CI/CD pipelines

Configuration

App Settings

Environment variables, override web.config/appsettings.json

Connection Strings

Database connections, can be slot-specific

Path Mappings

Virtual directories and applications

General Settings

Stack, platform, debugging options

Exam Focus Areas

App settings override local configuration at runtime
Use Key Vault references: @Microsoft.KeyVault(SecretUri=...)
Deployment slots require Standard tier or higher
WebJobs run background tasks in same context as web app

Azure Functions

Serverless compute for event-driven applications

Hosting Plans

Plan	Scaling	Timeout	Use Case
Consumption	Event-driven, auto	5 min (max 10)	Sporadic workloads
Premium	Pre-warmed, VNET	30 min (unlimited)	No cold start needed
Dedicated	Manual/auto on ASP	30 min (unlimited)	Existing ASP, predictable

Triggers and Bindings

HTTP Trigger

REST APIs, webhooks. authLevel: anonymous, function, admin

Timer Trigger

Scheduled tasks. CRON expression: "0 */5 * * * *"

Blob Trigger

React to blob storage events. Input/output bindings

Queue Trigger

Process queue messages. Automatic poison queue handling

Cosmos DB Trigger

React to document changes via change feed

Event Grid

React to Azure events, custom topics

Durable Functions

Orchestrator: Define workflow, checkpoint state
Activity: Unit of work called by orchestrator
Entity: Stateful entities with operations
Client: Start orchestrations, query status

Orchestrator Rules

• Must be deterministic (no random, DateTime.Now, I/O)

• Use context.CurrentUtcDateTime instead

• Never use async/await except for context methods

Exam Focus Areas

function.json defines triggers/bindings (or attributes in C#)
host.json configures runtime behavior for all functions
Use managed identity for secure access to Azure resources
Durable Functions patterns: chaining, fan-out/fan-in, async HTTP

Container Solutions

ACI, ACR, and Container Apps

Azure Container Instances (ACI)

Fastest way to run containers in Azure
Per-second billing, no VM management
Container groups share lifecycle, network, storage
Supports both Linux and Windows containers

Azure Container Registry (ACR)

SKU	Storage	Key Features
Basic	10 GB	Development, cost-effective
Standard	100 GB	Production workloads
Premium	500 GB	Geo-replication, private endpoint, content trust

Azure Container Apps

Serverless

Scale to zero, pay for resources used

Revisions

Version control, traffic splitting

Dapr

Built-in microservices capabilities

KEDA

Event-driven autoscaling

Exam Focus Areas

ACR Tasks for automated image builds on code commit
Use managed identity to pull from ACR without credentials
Container Apps ideal for microservices without Kubernetes complexity
ACI good for batch jobs, quick container runs

Azure Developer Associate Study Notes

Azure App Service

HTTP-based service for hosting web applications

Domain Weight

Implement Azure compute solutions represents 25-30% of the exam.

App Service Plans

Tier	Features	Scaling
Free/Shared	Dev/test, shared compute	None
Basic	Dedicated compute, custom domains	Manual (3 instances)
Standard	Auto-scale, slots, VNet	Auto (10 instances)
Premium	Enhanced perf, more slots	Auto (30 instances)
Isolated	Dedicated environment	Auto (100 instances)

Deployment Slots

Separate environments with own hostnames
Swap slots for zero-downtime deployments
Slot-specific settings: connection strings, app settings
Auto-swap available for CI/CD pipelines

Configuration

App Settings

Environment variables, override web.config/appsettings.json

Connection Strings

Database connections, can be slot-specific

Path Mappings

Virtual directories and applications

General Settings

Stack, platform, debugging options

Exam Focus Areas

App settings override local configuration at runtime
Use Key Vault references: @Microsoft.KeyVault(SecretUri=...)
Deployment slots require Standard tier or higher
WebJobs run background tasks in same context as web app

Azure Functions

Serverless compute for event-driven applications

Hosting Plans

Plan	Scaling	Timeout	Use Case
Consumption	Event-driven, auto	5 min (max 10)	Sporadic workloads
Premium	Pre-warmed, VNET	30 min (unlimited)	No cold start needed
Dedicated	Manual/auto on ASP	30 min (unlimited)	Existing ASP, predictable

Triggers and Bindings

HTTP Trigger

REST APIs, webhooks. authLevel: anonymous, function, admin

Timer Trigger

Scheduled tasks. CRON expression: "0 */5 * * * *"

Blob Trigger

React to blob storage events. Input/output bindings

Queue Trigger

Process queue messages. Automatic poison queue handling

Cosmos DB Trigger

React to document changes via change feed

Event Grid

React to Azure events, custom topics

Durable Functions

Orchestrator: Define workflow, checkpoint state
Activity: Unit of work called by orchestrator
Entity: Stateful entities with operations
Client: Start orchestrations, query status

Orchestrator Rules

• Must be deterministic (no random, DateTime.Now, I/O)

• Use context.CurrentUtcDateTime instead

• Never use async/await except for context methods

Exam Focus Areas

function.json defines triggers/bindings (or attributes in C#)
host.json configures runtime behavior for all functions
Use managed identity for secure access to Azure resources
Durable Functions patterns: chaining, fan-out/fan-in, async HTTP

Container Solutions

ACI, ACR, and Container Apps

Azure Container Instances (ACI)

Fastest way to run containers in Azure
Per-second billing, no VM management
Container groups share lifecycle, network, storage
Supports both Linux and Windows containers

Azure Container Registry (ACR)

SKU	Storage	Key Features
Basic	10 GB	Development, cost-effective
Standard	100 GB	Production workloads
Premium	500 GB	Geo-replication, private endpoint, content trust

Azure Container Apps

Serverless

Scale to zero, pay for resources used

Revisions

Version control, traffic splitting

Dapr

Built-in microservices capabilities

KEDA

Event-driven autoscaling

Exam Focus Areas

ACR Tasks for automated image builds on code commit
Use managed identity to pull from ACR without credentials
Container Apps ideal for microservices without Kubernetes complexity
ACI good for batch jobs, quick container runs