Create a Technical Design
10-15%of exam
Build Power Platform Solutions
10-15%of exam
Operational SecurityEnvironmentsDependenciesSolution LayersPipelinesBuild Tools
Implement Power Apps Improvements
10-15%of exam
Power FxComponent LibrariesCloud FlowsMonitorDelegationPerformance
Extend the User Experience
10-15%of exam
Extend the Platform
30-35%of exam
Plug-insCustom APIsCustom ConnectorsPlatform APIsAzure FunctionsCloud Flows
Develop Integrations
10-15%of exam
Dataverse EventsWebhooksService BusEvent HubsChange TrackingUpsert
Quick Facts
- Exam
- PL-400
- Credential
- Power Platform Developer Associate
- Time
- 100 min
- Pass
- 700/1000
- Questions
- Not published
- Level
- Intermediate
- Blueprint
- Mar 19 2026
- Renewal
- 12 months
Client Script vs Plug-in
Client script
- Browser execution
- Immediate form UX
- Can be bypassed
Plug-in
- Server execution
- All data channels
- Can join transaction
Experience vs enforcement
Logic Location Picker
- Requirement fits native feature→Built-in feature
- Immediate form behavior→Client script
- Simple declarative validation→Business rule
- Transactional server invariant→Synchronous plug-in
- Cross-service workflow→Cloud flow
- Custom serverless compute→Azure Functions
- Reusable Dataverse operation→Custom API
- External REST API→Custom connector
Architecture Choices
- Built-in features
- Prefer before custom
- Client script
- Immediate form logic
- Business rule
- Declarative validation
- Plug-in
- Server transaction logic
- Cloud flow
- Cross-service automation
- Azure Functions
- Custom serverless compute
- Custom API
- Reusable Dataverse operation
- Custom connector
- External API wrapper
Standard vs Virtual Table
Standard table
- Dataverse stores data
- Native capabilities
- Offline-friendly
Virtual table
- External system stores data
- Live external access
- Provider limitations
Stored data vs live data
Data + Security Design
- Standard table
- Native Dataverse storage
- Virtual table
- External data live
- Elastic table
- High-throughput data
- Authentication
- Verify identity
- Authorization
- Permit actions
- DLP policy
- Connector boundary
- Security role
- Privilege bundle
- Business unit
- Security boundary
- Team
- Shared access
- Row sharing
- Record-specific access
Component Design
- Canvas component
- Reusable app UI
- Component library
- Cross-app reuse
- PCF component
- Reusable coded UI
- Power Fx function
- Reusable formula logic
- Inbound integration
- External to Dataverse
- Outbound integration
- Dataverse to external
- AI solution logic
- Intelligent decision path
- AI agents
- Development troubleshooting aid
ALM Route
Unmanaged -> Pipeline -> Managed
Unmanaged: developPipeline: validateManaged: deploy
Managed vs Unmanaged
Unmanaged
- Development source
- Direct customization
- Export as managed
Managed
- Downstream deployment
- Controlled customization
- Supports uninstall
Build vs distribute
Environment + Security
- Environment
- Development isolation
- Least privilege
- Minimum required access
- Operational security
- Troubleshoot access failures
- Security role
- Supports code components
- Connection reference
- Solution-aware connection
- Environment variable
- Deployment-specific value
- Power Platform CLI
- Developer workflow tool
- Source control
- Component source truth
ALM + Delivery
- Unmanaged solution
- Development changes
- Managed solution
- Downstream deployment
- Dependency
- Required component link
- Solution layer
- Customization precedence
- Pipeline
- Governed deployment
- Build Tools
- Azure DevOps automation
- CI
- Build and validate
- CD
- Release and deploy
Canvas Logic
- Power Fx
- App formula language
- Named formula
- Reusable computed value
- Component library
- Reusable shared components
- Cloud flow
- Canvas business logic
- Delegation
- Server-side query work
- Nondelegable formula
- Partial local results
- Preload
- Load needed data
- Concurrent
- Parallel independent formulas
App Troubleshooting
- Monitor
- Runtime event trace
- Browser tools
- Client debugging
- Network trace
- Request timing
- Canvas performance
- Preload and delegate
- Model form
- Minimize heavy scripts
- Model view
- Limit costly columns
- Formula analysis
- Find slow operations
- Error handling
- Expose actionable failures
PCF Lifecycle
init -> updateView -> getOutputs -> destroy
init: set upupdateView: rendergetOutputs: return valuesdestroy: clean up
Experience Extension Picker
- Form event logic→Client API
- Reusable coded control→PCF
- Reusable canvas UI→Component library
- Command formula→Power Fx
- Complex command behavior→JavaScript
- Embedded tailored experience→Custom page
Client Scripting
- Client API
- Model-driven object model
- Execution context
- Event runtime context
- Form context
- Current form access
- Event handler
- Registered client callback
- Xrm.WebApi
- Dataverse client requests
- Power Fx command
- Declarative button action
- JavaScript command
- Coded button action
- navigateTo
- Open custom page
PCF Components
- Manifest
- Component metadata
- init
- Initialize component
- updateView
- Render changed state
- getOutputs
- Return bound values
- destroy
- Release resources
- Device API
- Device capabilities
- Utility API
- Platform helpers
- Web API
- Dataverse data access
- Solution package
- Deploy component
Plug-in Stages
PV -> PO -> Core -> Post
PV: reject earlyPO: modify targetCore: platform operationPost: react after
PreValidation vs PreOperation
PreValidation
- Before main transaction
- Cancel early
- Validate request
PreOperation
- Inside transaction
- Modify target
- Before core operation
Reject early vs mutate
Plug-in Pipeline
- PreValidation
- Before main transaction
- PreOperation
- Inside transaction before core
- PostOperation
- After core operation
- Execution context
- Message runtime data
- Target
- Incoming row data
- Pre-image
- Before value snapshot
- Post-image
- After value snapshot
- Filtering attributes
- Limit update triggers
- Tracing service
- Sandbox diagnostics
- Organization service
- Dataverse operations
Synchronous vs Asynchronous
Synchronous
- Caller waits
- Can roll back
- Keep execution short
Asynchronous
- Runs later
- PostOperation only
- Background processing
Immediate consistency vs throughput
Connectors + APIs
- OpenAPI definition
- REST contract
- Connector auth
- Secure API access
- Policy template
- Runtime request transformation
- Custom code
- Transform connector data
- Custom API
- Dataverse message
- Web API
- RESTful Dataverse operations
- Organization service
- .NET Dataverse operations
- OAuth
- Delegated or app auth
- Retry policy
- Handle API limits
- Batch
- Group API operations
Custom API vs Connector
Custom API
- Dataverse operation
- Plug-in implementation
- Platform message
Custom connector
- External REST API
- OpenAPI contract
- Apps and flows
Dataverse operation vs REST wrapper
Functions + Flows
- Azure Functions
- Custom serverless compute
- Scheduled trigger
- Time-driven function
- Event trigger
- Event-driven function
- Managed identity
- Passwordless service auth
- Dataverse trigger
- Row event flow
- Trigger filter
- Reduce flow runs
- Secure inputs
- Hide sensitive values
- Key Vault
- Store secrets
- Scope
- Group flow actions
- Child flow
- Reusable flow logic
- Service principal
- Application identity
Synchronization Sequence
Track -> Key -> Upsert -> Checkpoint
Track: get deltasKey: match rowUpsert: write onceCheckpoint: resume later
Webhook vs Service Bus
Webhook
- Direct HTTP delivery
- Simple endpoint
- Receiver handles availability
Service Bus
- Brokered messaging
- Durable delivery
- Decoupled consumers
Direct call vs broker
Integration Picker
- HTTP event receiver→Webhook
- Durable brokered delivery→Service Bus
- High-volume event stream→Event Hubs
- Incremental synchronization→Change tracking
- External business identifier→Alternate key
- Create-or-update synchronization→Upsert
- Custom integration compute→Azure Functions
Event Integration
- Notification service
- Publish execution context
- Registration tool
- Register service endpoint
- Webhook
- HTTP event delivery
- Service Bus
- Reliable brokered messaging
- Event Hubs
- High-volume event streaming
- Service endpoint
- External event destination
- Remote context
- Serialized execution data
- Async step
- Post-transaction delivery
Alternate Key vs Primary Key
Alternate key
- Business identifier
- External system match
- Supports upsert
Primary key
- Dataverse GUID
- Native row identity
- Always unique
External identity vs Dataverse identity
Data Synchronization
- Change tracking
- Incremental data changes
- Delta token
- Synchronization checkpoint
- Alternate key
- External business identity
- Primary key
- Dataverse row GUID
- Upsert
- Create or update
- Idempotency
- Safe repeated processing
- Conflict handling
- Resolve concurrent changes
- Retry
- Recover transient failures
Common Traps
Question count confusion
Practice count is local ≠ Exam count not published
Client validation only
Client logic can bypass ≠ Plug-in enforces server-side
Wrong plug-in image
Pre-image holds old values ≠ Post-image holds new values
Unfiltered update step
Every update may trigger ≠ Filter relevant attributes
Delegation warning ignored
Local subset can mislead ≠ Prefer delegable queries
Configuration embedded
Use environment variables ≠ Use connection references
Secrets exposed
Secure flow inputs ≠ Store secrets in Key Vault
API throttling ignored
Expect transient limits ≠ Apply bounded retries
Long synchronous work
Caller remains blocked ≠ Move work asynchronous
Last Minute
- 1.Platform leads at 30-35%
- 2.Other domains each 10-15%
- 3.Questions = Not published
- 4.Built-in before custom code
- 5.Client UX; plug-in enforcement
- 6.Delegate large canvas queries
- 7.PreOperation can modify Target
- 8.PostOperation supports asynchronous steps
- 9.Custom API = Dataverse message
- 10.Connector = external REST wrapper
- 11.Track, key, then upsert
- 12.Retry Dataverse API limits
- 13.Managed solutions go downstream
- 14.Agents can aid troubleshooting
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