BJC AP CSP Unit 3 Exam Review (In-Class)

Front

What is shopping list[6]?

Back

chips

Answer explanation

AP Exam pseudocode:

item 6 of "shopping list"

Front

What is the output of point(x,y) which takes in two numbers & reports a list, [x,y], ignoring the words? Options: [-50,20], [10, 120], [30,20]; [-50], [10], [30]; [-50, 10, 30]; -50, 10, 30

Back

-50, 10, 30

Answer explanation

The last three choices are not identical. Square brackets, [], denote a list.

Front

A global and a local variable have the same name. Will changing the value of the global variable affect the local one?

Back

No

Answer explanation

Even if they have the same name.

Global variable: When you click "Make a variable" button in the Variables palette.

Local variable: A script variable or a paramter.

Front

Where will the sprite end up after the code above is executed? Options: A, B, C, D

Back

A

Answer explanation

The curly brackets {} denote what is repeated before the next instruction runs. So, the first repeat has to finish before the second repeat starts.

Front

Which brick wall could not be drawn by the block above? A, B, C, D

Back

D

Answer explanation

Check each random reporter by itself, if possible. Can only draw 2-4 full bricks per row.

Front

Which script(s) will allow the sprite to escape the maze?

Back

Both scripts

Answer explanation

Write things down on paper. They work the same way.

Front

What is output when the code above is run? Options: 21, 22, 23, Nothing gets displayed; this is an infinite loop

Back

22

Answer explanation

Pen/pencil to draw trace table.

5, 6, 7, 8, 9, 10, 13, 16, 19, 22

Front

Recall the Brick Wall lab. Which of the following lists the blocks in order from highest level of abstraction to lowest level? Be careful!

Back

None of the above

Answer explanation

What doesn't require the others to write is the lowest abstraction. Block 1 using Block 2 means 1 is at a higher level of abstraction than 2.

The correct answer is C-B-A: draw wall uses draw row A and draw row B, both of which use draw brick.

Front

Back

It reports 3.89

Answer explanation

Work inside out.

Front

Which of the following would most likely be a harmful effect of computing innovations?
facial recognition software are not trained for darker faces,
Alexa supports independence of the elderly by providing reminders,
robotic teachers build language skills in young students,
self-driving cars reduce need for human taxi drivers, causing unemployment

Back

self-driving cars reduce need for human taxi drivers, causing unemployment

Answer explanation

Not a purpose (why it was invented) or a function (how it works), but an outcome from using it as intended. The facial recognition, it's not explained why is it bad.