DA0-002 Visualization and Reporting Practice Question
Which TWO actions will improve the readability of a bar chart showing quarterly sales across five regions?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Sort bars in descending order of sales
Sorting bars by sales (B) allows immediate comparison of relative performance. Adding data labels on each bar (C) provides exact figures, enhancing readability. Option A is incorrect because overlaying a line chart on a bar chart mixes data types and can obscure the bar values. Option D (vertical gridlines for every bar) often adds visual clutter without improving readability. Option E (3D bar chart) distorts perspective and makes accurate comparison difficult.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Overlay a line chart showing cumulative sales
Why it's wrong here
Mixing chart types can confuse the viewer; use a separate chart if needed.
- ✓
Sort bars in descending order of sales
Why this is correct
Sorted bars make it easy to identify largest and smallest values.
- ✓
Add data labels on top of each bar
Why this is correct
Data labels provide precise values for quick reading.
- ✗
Add vertical gridlines for every bar
Why it's wrong here
Excessive gridlines add clutter; horizontal lines are usually sufficient.
- ✗
Switch to a 3D bar chart to add visual depth
Why it's wrong here
3D can distort proportions and make comparison harder.
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