Data Tools and Visualization Flashcards
7 cards from real DAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Data Tools and Visualization flashcards as text
In Tableau, which object type is used to combine multiple worksheets and filters into a single interactive view?
Answer: Dashboard
A dashboard combines multiple worksheets, filters, and objects into one interactive layout.
Which chart type best displays the correlation between two continuous numeric variables?
Answer: Scatter plot
A scatter plot maps two numeric variables on the X and Y axes to reveal correlation.
In Power BI, which language is used to create calculated columns and measures?
Answer: DAX
DAX (Data Analysis Expressions) creates calculated columns and measures in Power BI.
What is the primary purpose of a treemap visualization?
Answer: Show hierarchical part-to-whole relationships
A treemap uses nested rectangles to show hierarchical part-to-whole proportions.
Which color practice most improves accessibility for colorblind users in dashboards?
Answer: Using colorblind-safe palettes with patterns or labels
Colorblind-safe palettes plus patterns or labels avoid reliance on color alone.
In Power BI, what does Power Query (the M engine) primarily handle?
Answer: Data transformation and cleaning during load
Power Query transforms, cleans, and shapes data during the load/ETL step.
Which visualization is most appropriate for showing a single value against a target?
Answer: KPI or gauge card
A KPI or gauge card shows one metric compared against a defined target.