DAC Data Tools and Visualization 4

Question 1

Which chart type is best for displaying the distribution of a single continuous variable?

Accepted Answer

Histogram

Answer

Pie chart

Answer

Scatter plot

Answer

Bar of categories

Question 2

In Tableau, what is the difference between a live connection and an extract?

Accepted Answer

Live queries the source directly; extract is a static in-memory snapshot

Answer

They are identical

Answer

Live is slower always

Answer

Extract requires internet at all times

Question 3

What is the recommended maximum number of slices before a pie chart becomes hard to read?

Accepted Answer

Around 5-6 slices

Answer

20 slices

Answer

50 slices

Answer

There is no practical limit

Question 4

In SQL for reporting, which clause groups rows so aggregate functions apply per category?

Accepted Answer

GROUP BY

Answer

ORDER BY

Answer

WHERE

Answer

HAVING only

Question 5

Which principle suggests placing the most important dashboard metric in the top-left area?

Accepted Answer

Z-pattern / F-pattern reading flow

Answer

Golden ratio only

Answer

Random placement

Answer

Center-only focus

Question 6

A choropleth map encodes data values using what visual attribute?

Accepted Answer

Color shading of geographic regions

Answer

Line thickness

Answer

Bubble animation

Answer

Text size only

Question 7

In Power BI or Tableau, what is the main benefit of drill-down functionality?

Accepted Answer

Letting users navigate from summary to detailed levels

Answer

Reducing file size

Answer

Encrypting data

Answer

Removing the need for filters