Section: Expressions
Answers to section modules.

Question: Which expression below will calculate the area of every feature? Use experimentation in the field calculator to verify your answer
Answer: $area

Question: Figure out which of these expression(s) you would use to change the outline colour of a symbol from the places when max_pop is larger then 5 million people. Experiment in the symbol properties panel
Answer: CASE WHEN pop_max > 5000000 THEN color_rgb(255,0,0) ELSE color_rgb(0,0,0) END
Answer: IF(pop_max > 5000000, color_rgb(255,0,0), color_rgb(0,0,0))

Question: What is the best way to describe geometry functions
Answer: Group of functions which are intended to exclusively operate on the geometry of layers

Question: Which of the following can not be achieved using an expression
Answer: Give statics about a column in the attribute table.

Question: Can a user update selected records
Answer: True

Question: The field calculator only works with relational database layers
Answer: False

Question: Indicate which statements are correct
Answer: when calculating fields you can either create a new field or update an existing one