DATA VISUALIZATION EXAMINATION QUESTION AND CORRECT ANSWER WITH EXPLANATION GRADED A+ STUDY GUIDE

DATA VISUALIZATION EXAMINATION QUESTION AND
CORRECT ANSWER WITH EXPLANATION GRADED A+
STUDY GUIDE SOUTHERN NEW HAMPSHIRE UNIVERSITY

1. Data visualization is:

A. Graphical representation of data
B. Data deletion
C. Data encryption
D. Data storage
Answer: A
Rationale: It presents data visually using charts and graphs.



2. The main purpose of data visualization is to:

A. Communicate insights clearly
B. Store data
C. Delete data
D. Encrypt data
Answer: A
Rationale: It helps people understand data quickly.



3. A bar chart is used to show:

A. Comparison between categories
B. Time series only
C. Random data
D. Encryption
Answer: A
Rationale: It compares discrete groups.



4. A line chart is best for showing:

,A. Trends over time
B. Categories
C. Text data
D. Encryption
Answer: A
Rationale: It shows continuous change.



5. A pie chart shows:

A. Proportions
B. Trends
C. Time
D. Text
Answer: A
Rationale: It represents parts of a whole.



6. A histogram is used for:

A. Distribution of numerical data
B. Encryption
C. Text display
D. Database design
Answer: A
Rationale: Shows frequency distribution.



7. A scatter plot shows:

A. Relationship between two variables
B. Only categories
C. Only time
D. Encryption
Answer: A
Rationale: It shows correlation patterns.



8. Heatmaps are used to show:

, A. Intensity of values
B. Text data
C. Code
D. Files
Answer: A
Rationale: Uses color gradients for values.



9. Dashboard is:

A. Collection of visualizations
B. Single chart
C. Database
D. Code file
Answer: A
Rationale: Summary view of data.



10. KPI stands for:

A. Key Performance Indicator
B. Known Process Input
C. Key Programming Interface
D. Kernel Processing Index
Answer: A
Rationale: Measures performance.



11. A data point is:

A. Single value in dataset
B. Chart
C. Graph
D. Table
Answer: A
Rationale: Individual observation.



12. Tableau is used for: