Graded Quiz: Interactive Visual Analytics and Dashboard :Applied Data Science Capstone (Applied Data Science Specialization) Answers 2025

1. Question 1

How can you add marking objects (circles, markers, lines) on a Folium map? (Click all that apply)

• ✅ map.add_child(object)

• ❌ add_node(map, object)

• ❌ map.add_to(object)

• ✅ object.add_to(map)

Explanation: In Folium, objects can be added either using map.add_child(obj) or by calling obj.add_to(map).

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2. Question 2

If you want to add multiple markers with similar coordinates, which plugin should you use?

• ❌ MarkerContainer

• ❌ Markers should be added directly

• ❌ MarkerGroup

• ✅ MarkerCluster

Explanation: MarkerCluster groups overlapping markers to avoid clutter.

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3. Question 3

Which attribute is used to provide available selections for a Plotly Dropdown?

• ✅ options

• ❌ placeholder

• ❌ values

• ❌ input

Explanation: In Dash, a dcc.Dropdown uses the options parameter to populate selectable items.

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4. Question 4

How do we associate the result of a callback function to a layout element?

• ❌ Dash automatically renders it

• ❌ Using component name

• ✅ Using a unique component id

Explanation: Dash callbacks always reference components by their id property.

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5. Question 5

Can we add multiple input components to a Dash callback function?

• ✅ Yes

• ❌ No

Explanation: Dash allows multiple inputs via @app.callback(Output(...), [Input(...), Input(...), ...]).

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🧾 Summary Table

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