Esri ArcGIS Maps SDK for JavaScript Associate (EJSA_2024) Certification Sample Questions

01. You want to include a Layer List and Legend widget in a custom web application. What must be true about your map and code?
a) The layer list will only work if MapView is in 3D mode
b) Both widgets require that FeatureLayer be added before initialization
c) Each widget must be passed the view and container as initialization properties
d) You must import a layout manager from Calcite to use them

02. What must be set for a feature layer to support labeling?
a) layer.enableLabeling = true
b) labelingInfo with an array of LabelClass objects
c) renderer.labelEnabled = true
d) layer.symbol.label = "true"

03. How can a developer register their OAuth 2.0 application for use with ArcGIS Online before implementing login flows in their web app?
a) By adding a clientId to the view constructor
b) By setting the token property in each widget
c) By creating an application in the ArcGIS Developer dashboard
d) By running registerOAuth() method in JavaScript

04. When building a tool that allows users to find all features that intersect a drawn polygon, which ArcGIS Maps SDK class provides the necessary methods for creating and managing these user-defined geometries?
a) SketchViewModel
b) Graphic
c) QueryTask
d) FeatureLayer

05. Which JavaScript feature allows you to pause the execution of an asynchronous function until a Promise is resolved?
a) Promise.defer()
b) then/catch
c) yield/return
d) async/await

06. What is the effect of calling view.container = null in a JavaScript mapping application?
a) It reloads the view in fullscreen
b) It detaches the map view from the DOM and removes all UI
c) It resets the map extent to its default
d) It disables all event listeners attached to the view

07. When developing a map-based web application, which JavaScript language feature should be used to handle asynchronous tasks such as loading a web map or querying a layer?
a) Callback functions only
b) setTimeout with polling loops
c) Synchronous function blocks
d) JavaScript Promises

08. You are building a dashboard that shows the number of schools within each district. What approach should be taken to retrieve and display this aggregated information?
a) Use Query.returnStatistics = true and specify groupByFieldsForStatistics
b) Use FeatureLayerView.queryFeatures() with returnCentroid
c) Use a QueryTask with the returnCountOnly parameter set to true
d) Use a Renderer with a visualVariables property

09. What is the effect of using featureReduction: { type: "cluster" } in a FeatureLayer?
a) It removes overlapping features
b) It groups nearby features into visual clusters
c) It simplifies the geometry of features
d) It hides duplicate attribute values

10. Which tool would you use to adjust the UI layout in a SceneView to account for overlapping widgets?
a) view.reorderWidgets()
b) CalciteThemeManager
c) view.padding
d) esri/widgets/UIGrid