Esri ArcGIS Developer Foundation (EADF_2026) Certification Sample Questions

01. Users need to add and update features in a hosted feature layer through a web app.
Which capability must be enabled on the layer to allow this?
a) The export data capability
b) The sync (offline) capability
c) The editing capability on the layer

02. Requests to ArcGIS Online and its location services must be made over which protocol so that tokens, keys, and data are protected in transit?
a) FTP
b) HTTPS
c) Plain HTTP on port 80

03. Why must an application's OAuth client secret never be embedded in browser-side JavaScript or a mobile app binary?
a) Client-side code can be read by users, exposing the secret
b) The client secret changes automatically on every request
c) Client-side code cannot make requests to ArcGIS REST services

04. When building a 3D web scene, which layer type provides the ground surface (terrain heights) that other layers are draped over or positioned against?
a) Scene layer
b) Elevation layer
c) Imagery layer

05. Leadership wants a polished, self-contained report that explains a completed initiative to the public using narrative text, images, and supporting maps — not a live monitoring view.
Which product fits this communication goal?
a) StoryMaps
b) Dashboards
c) Instant Apps

06. After publishing a new hosted feature layer, a developer's public web app fails to load it, and the service returns HTTP 403. Tokens used elsewhere in the app are valid, and there are no cross-origin errors.
What is the most likely cause?
a) The layer is not shared publicly, so anonymous users are denied.
b) The layer's renderer is misconfigured
c) The app is pointing at the wrong basemap

07. Every week, a batch of new survey records must be added to a hosted feature layer. The records arrive as a file that uses the same schema as the layer, and all previously stored features must remain unchanged.
Which update approach fits this requirement best?
a) Edit the layer feature by feature in a web map
b) Publish the weekly file as a separate hosted feature layer
c) Append the new records to the existing feature layer

08. Several web maps and apps reference the same hosted feature layer in an organization.
Why should an administrator review an item's dependencies before deleting that hosted feature layer?
a) Because deleting the layer would automatically delete every web map that uses it
b) Because web maps and apps that reference the layer break once its source is gone
c) Because deleting the layer moves its data into the web maps that referenced it

09. Before running a spatial query, an app needs the user to draw a rectangle on the map to define the area of interest.
Which capability lets the user create that geometry interactively?
a) A geocoding request that converts an address into a point
b) The layer's popupTemplate configuration
c) A sketch/draw tool that captures the user-drawn geometry.

10. Following the principle of least privilege, which default role should you assign to field staff who only need to edit attributes of existing features in an editable layer?
a) Administrator
b) Data Editor
c) Publisher