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Free TDS-C01 Exam Braindumps (page: 12)

Page 11 of 56
PDF with 317 Questions

True or False: LEFT JOIN returns all rows from the left table, with the matching rows in the right table

  1. True
  2. False

Answer(s): A

Explanation:

This is true, indeed!
The LEFT JOIN keyword returns all records from the left table (table1), and the matched records from the right table (table2). The result is NULL from the right side, if there is no match.


Reference:

https://www.w3schools.com/sql/sql_join_left.asp



To use a quick table calculation, which of the following programming languages do you need to know?

  1. ython
  2. Java
  3. Javascript
  4. None of these

Answer(s): D

Explanation:

You don't need to know ANY programming language to use quick table calculations!

Follow along with the steps below to learn how to apply a quick table calculation to a visualization:
1) Open Tableau Desktop and connect to the Sample-Superstore data source, which comes with Tableau.
2) Navigate to a new worksheet.
3) From the Data pane, under Dimensions, drag Order Date to the Columns shelf.
4) From the Data pane, under Dimensions, drag State to the Rows shelf.
5) From the Data pane, under Measures, drag Sales to Text on the Marks Card.
6) From the Data pane, under Measures, drag Profit to Color on the Marks Card.
7) On the Marks card, click the Mark Type drop-down and select Square.


The visualization updates to look like this:


Apply the quick table calculation

1) On the Marks card, right-click SUM(Profit) and select Quick Table Calculation > Moving Average. Note: You can only perform quick table calculations on measures in the view.
A delta symbol appears on the field to indicate that a quick table calculation is being applied to the field. The colors in the visualization update to show the moving average of profit across the years.


Reference:

https://help.tableau.com/current/pro/desktop/en-us/calculations_tablecalculations_quick.htm



Given a map, which of the following fields can be placed in Size, Shape, Detail, Color

  1. Profit, State, Number of Records, Sales
  2. Region, Country, Profit, State
  3. Longitude, Country, State, Sales
  4. Sales, State, Country, Profit

Answer(s): D

Explanation:

Since Sales is a measure, it can easily be depicted via size.
To drill down and change the level of detail, Country is the correct choice since it will contain STATE. We can then depict the various states by different shapes such as circle, square etc.
Finally, the Profit can be depicted via a color! Eg - Red for poor and green for excellent profits!


Reference:

https://www.tableau.com/learn/tutorials/on-demand/aggregation-granularity-and-ratio-calculations



When using a Blend, what is the color of tick-mark on the primary and secondary data sources respectively?

  1. Red, Blue
  2. Orange, Blue
  3. Blue, Red
  4. Blue, Orange

Answer(s): D

Explanation:

When using a Blend, the primary data source appears with a BLUE tick-mark and the secondary data source appears with a ORANGE tick-mark.
See below:


Reference:

https://www.tutorialspoint.com/tableau/tableau_data_blending.htm






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