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OutSystems Associate Developer Cheat Sheet

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UI Design

  • 26% of exam
  • Screen Widgets Blocks and Events List Form Block Event

Logic

  • 22% of exam
  • Client/Server Actions Form Validations Logic Flows Exception Handling

Fetching Data

  • 20% of exam
  • Aggregates Fetching Data on Screens Data Action REST Consume

Reactive Apps

  • 12% of exam
  • Client Variables Screen Lifecycle Debugging Service Studio

Data Modeling

  • 12% of exam
  • Entities Data Types Data Relationships Static Entity

Architecture and Security

  • 8% of exam
  • Modular Dependencies Role-based Security Lifecycle Roles

Quick Facts

  • Exam Associate Developer
  • Credential OutSystems Certified Associate Developer
  • Time 120 min
  • Questions 50
  • Pass 70% (35/50)
  • Platform Reactive Web Apps
  • Cost $200 USD
  • Validity 2 years
  • Format Multiple choice

Block vs Screen UI

Block

  • Reusable component
  • Embedded in screens
  • Has events

Screen

  • Standalone page
  • Navigable URL
  • Has lifecycle
  • Reusable vs standalone

Widget Picker UI

  • Show record list → List ( repeat widgets )
  • Edit a record → Form ( bound to entity )
  • Conditional display → If ( boolean check )
  • Group widgets → Container ( layout box )
  • Reusable pattern → Block ( shared UI )
  • Navigate away → Link ( screen transition )

Screen Widgets UI

  • Screen UI page
  • Block Reusable UI component
  • Container Group widgets
  • Placeholder Block content slot
  • List Repeat records
  • Form Edit record
  • If Conditional display
  • Link Navigate action
  • Button Trigger action

Blocks and Events UI

  • Web Block Reusable component
  • Block Event Notify parent screen
  • OnNotify Handle block event
  • OnAfterNotify Post-notify handler
  • Event Handler Respond to event
  • Widget UI element

Action Hierarchy LO

  • Data -> Server -> Client -> Screen
  • Data: fetch Server: DB logic Client: browser Screen: UI event

Server Action vs Client Action LO

Server Action

  • Runs server-side
  • Can query DB
  • Aggregates allowed

Client Action

  • Runs browser-side
  • No DB access
  • UI manipulation
  • Server DB vs browser UI

Action Type Picker LO

  • UI event triggered → Screen Action ( browser-side )
  • Fetch screen data → Data Action ( cached )
  • Server-side logic → Server Action ( can query DB )
  • Browser-side logic → Client Action ( no DB access )
  • Long-running task → Process ( background )
  • Scheduled task → Timer ( runs periodically )
  • External API call → Server Action ( REST consume )

Logic and Actions LO

  • Screen Action UI event handler
  • Server Action Server-side logic
  • Client Action Browser-side logic
  • Data Action Fetch screen data
  • Process Background task
  • If Conditional branch
  • Switch Multi-branch logic
  • Assign Set variable value

Exception and Validation LO

  • Exception Runtime error
  • Raise Exception Trigger error
  • Exception Handler Catch logic
  • Try/Catch Handle errors
  • Form Validation Validate inputs
  • Required Field Mandatory input

Aggregate vs SQL FE

Aggregate

  • Visual builder
  • Parameterized safe
  • Joins entities

SQL

  • Raw SQL code
  • Advanced queries
  • Manual escaping
  • Visual vs code query

Data Source Picker FE

  • Fetch from entity → Aggregate ( visual query )
  • Complex query → SQL ( advanced only )
  • Enumeration values → Static Entity ( design-time )
  • External API data → REST Consume ( server-side )
  • Screen-bound data → Data Action ( auto-refresh )
  • Runtime config → Site Property ( env-specific )

Aggregates and Fetching FE

  • Aggregate Visual query builder
  • Filter Condition rows
  • Sort Order results
  • Join Combine entities
  • Computed Attribute Calculated field
  • Max Records Limit result rows
  • SQL Query Advanced data fetch
  • Data Action Fetch screen data

External Data and REST FE

  • REST Consume Call external API
  • REST Publish Expose API endpoint
  • SOAP Consume Legacy integration
  • Site Property Runtime config value
  • JSON Structure Deserialize response
  • API Method Exposed server action

Screen Lifecycle RE

  • Init -> Ready -> ParametersChanged
  • Init: before render Ready: after display Changed: new params

Reactive vs Traditional Web RE

Reactive Web

  • Browser-side logic
  • Client Actions
  • No full postback

Traditional Web

  • Server-rendered
  • Screen Actions
  • Full postback
  • Client vs server render

Service Studio IDE RE

  • Service Studio Visual IDE
  • TrueChange Real-time checker
  • Integration Studio Build extensions
  • Forge Component marketplace
  • Toolbox Drag widgets
  • Canvas Design surface
  • Properties pane Edit settings
  • Element tree Navigate hierarchy

Reactive App Concepts RE

  • Reactive Web Browser-side logic
  • Traditional Web Server-rendered pages
  • Client Variable Browser-scoped variable
  • OnInitialize Before screen renders
  • OnReady After screen displays
  • OnParametersChanged New parameters received
  • Debugging Service Studio debugger

Relationship Rules DA

  • 1:N = FK; N:N = Join
  • 1:N: foreign key N:N: join entity FK: child entity Join: both IDs

Static Entity vs Entity DA

Static Entity

  • Design-time records
  • Enumeration
  • Fixed values

Entity

  • Runtime records
  • Database table
  • User data
  • Enumeration vs data table

Data Types and Entities DA

  • Entity Database table
  • Static Entity Design-time enumeration
  • Identifier Primary key type
  • Text String data type
  • Integer Whole number type
  • Boolean True or false type
  • Date Time Timestamp type
  • Decimal Fixed precision number

Relationships DA

  • One-to-Many Foreign key child
  • Many-to-Many Join entity pattern
  • Foreign Key Reference identifier
  • Join Entity Links two entities
  • Referential Integrity Auto-enforced constraint
  • Index Auto-created on FK

Deploy Flow AR

  • Personal -> Common -> LifeTime
  • Personal: private Common: shared LifeTime: promote Prod: governed

1-Click Publish vs LifeTime AR

1-Click Publish

  • Dev environment
  • Service Studio
  • Ctrl+P

LifeTime

  • Cross-environment
  • Promote apps
  • Governance
  • Dev iteration vs prod deploy

Lifecycle and Deployment AR

  • 1-Click Publish Deploy to dev
  • Personal Area Private dev zone
  • Common Area Shared app zone
  • LifeTime Cross-env deployment
  • Versioning Track module versions
  • Deployment Zone Target environment

Role vs Registered Role AR

Role

  • Permission group
  • Defined in module
  • Screen/entity access

Registered Role

  • Granted to user
  • Runtime assignment
  • Explicit enable
  • Defined vs assigned

Roles and Security AR

  • Role User group permission
  • Registered Role Granted to user
  • Screen Permission Role-based access
  • Entity Permission Data access control
  • Anonymous Role Unauthenticated access

Common Traps

Client Action vs Server Action

  • Client Actions can't run Aggregates ≠ Server Actions can access database

Static Entity vs Entity

  • Static Entity = design-time records ≠ Entity = runtime user data

1-Click Publish vs Production

  • 1-Click Publish deploys to dev ≠ LifeTime promotes to production

Aggregate vs SQL

  • Aggregate = visual, safe ≠ SQL = code, advanced only

Block vs Screen

  • Block = reusable component ≠ Screen = standalone page

Personal vs Common Area

  • Personal Area = private zone ≠ Common Area = shared apps

Last Minute

  • 1. 50 Q, 120 min, 35 pass
  • 2. UI Design = 26% (highest weight)
  • 3. Logic = 22% (second highest)
  • 4. Client Actions cannot run Aggregates
  • 5. Static Entity = enumeration, design-time
  • 6. 1-Click Publish: dev, not prod
  • 7. Screen lifecycle: Init, Ready, Changed
  • 8. 1:N = FK; N:N = join
  • 9. Data Action fetches screen data
  • 10. Server Actions can access database
  • 11. Roles control screen and entity access
  • 12. Reactive = browser; Traditional = server

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