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Graded Quiz: Building a Dashboard :IBM Data Analyst Capstone Project (IBM Data Analyst Professional Certificate) Answer 2025

1. Question 1

Primary purpose of creating a dashboard:

  • ✅ Visualize and analyze data effectively

  • ❌ Write code

  • ❌ Share raw datasets

  • ❌ Store raw data

Explanation:

Dashboards turn complex data into visual insights for decision-making.

2. Question 2

Dashboard layout template used in both labs:

  • ❌ 2×2 rectangle

  • ❌ Freeform

  • ❌ Single-column

  • ✅ 3 × 3 grid

Explanation:

Both IBM Cognos and Looker Studio labs use a 3×3 grid template for organizing visualizations.

3. Question 3

Why include chart titles and value labels?

  • ✅ To help viewers understand the chart’s purpose and details

  • ❌ Meet software requirements

  • ❌ Increase file size

  • ❌ Visual appeal only

4. Question 4

Best chart to visualize trends/distributions in respondent ages:

  • ❌ Pie chart

  • ❌ Word cloud

  • ❌ Stacked bar

  • ✅ Line chart

Explanation:

Line charts are ideal for showing numeric trends or distribution over continuous values.

5. Question 5

Necessary step before using a dataset:

  • ✅ Uploading the dataset as a data asset to the tool

  • ❌ Copying to multiple tabs

  • ❌ Editing in text editor

  • ❌ Deleting unused rows

6. Question 6

Why apply filters to exclude null values?

  • ❌ Reduce dataset size

  • ❌ Speed up dashboard

  • ❌ Increase data points

  • ✅ Improve accuracy of visualizations

Explanation:

Null values distort aggregations and totals.

7. Question 7

Metric used in both labs to visualize technology usage:

  • ❌ Desired platforms

  • ❌ Education levels

  • ❌ Age distribution

  • ✅ Top 10 languages used

8. Question 8

Chart type for hierarchical data (PlatformWantToWorkWith):

  • ❌ Bar chart

  • ❌ Word cloud

  • ❌ Tree map (close but not used in lab)

  • ✅ Hierarchy bubble chart

9. Question 9

Best chart to visualize respondent distribution by gender:

  • ❌ Stacked column

  • ✅ Pie chart

  • ❌ Scatter bubble

  • ❌ Line chart

Explanation:

A pie chart clearly shows proportions among categories.

10. Question 10

What must students submit?

  • ❌ Word document screenshots

  • ❌ GitHub link to PDF

  • ❌ Raw dataset

  • ✅ A PDF export of the dashboard

(From the lab: “Submit the exported PDF of your dashboard.”)

🧾 Summary Table

Q Correct Answer Key Concept
1 Visualize & analyze data Dashboard purpose
2 3×3 grid Layout template
3 Titles & labels clarify info Visualization clarity
4 Line chart Numeric distribution
5 Upload dataset Required setup
6 Exclude nulls for accuracy Filtering
7 Top 10 languages used Technology usage metric
8 Hierarchy bubble chart Hierarchical data
9 Pie chart Gender distribution
10 PDF export of dashboard Submission requirement