Knowledge quiz

It’s time to put what you’ve learned to the test, get 8 questions right to pass this week.

Lists are Snap!’s aggregate data type that can hold almost anything with the exception of what?

Choose the correct answer.

Sprites

Other lists

Mouse pointer

Blocks

Both the “wait _ secs” block and the “rest for _ beats” block suspend execution of the current script for a certain time. How do these blocks differ?

Choose the correct answer.

The “rest” block pauses for an interval of beats known as tempo.

The “rest” block only works for music.

The “wait” block does not work for music.

There is no difference, both blocks behave the same.

How can you draw a perfect circle in Snap!’s Paint Editor?

Choose the correct answer.

By entering the diameter in the “brush-size” field and clicking on “circle”.

By pressing and holding the shift key while drawing with the ellipse tool.

By pressing and holding the return key while drawing with the ellipse tool.

All circles are automatically snapped into perfect shape.

What is the correct name for a clicking upside-down pendulum that helps musicians practice keeping the right tempo?

Choose the correct answer.

Metrofoam

Metrognome

Metrodome

Metronome

What does the “paste on” block do?

Choose the correct answer.

It inserts a new costume in the Costumes tab.

It switches to a costume named “Alonzo”.

It copies all the blocks from one sprite to another.

It stamps a sprite onto the visible regions of another.

What do you call it when a computer program merges real and virtual worlds, often by combining a live-video feed with interactive computational artifacts?

Choose the correct answer.

Blockchain

Cybercrime or Darknet

Mixed Reality or Augmented Reality

Artificial Intelligence or Machine Learning

What kind of data goes into the „note“ slot of this block? play note _ for _ beats

Choose the correct answer.

A word: A syllable representing the international musical name of a note, for example, “Do” for the note “C”, “Re” for the note “D”, “Mi” for the note “E”, and so on.

A number: An integer representing the note’s MIDI pitch, for example, 69 for the note “A”.

Any notation is allowed in that slot, either a number (e.g. “60”), a letter (e.g. “C”), or a word (e.g. “Do”).

A letter: A capital letter representing the musical name of the note followed by either a pound sign for “sharp” or the lowercase letter “b” for “flat”.

What is a benefit of separating data (inputs) from function calls (blocks)?

Choose the correct answer.

Data can easily be transformed without having to copy & paste large parts of the program. For example, musical notes can be transposed to another key (pitch) without having to change how they are played.

Programs run faster and perform better if you keep the data in separate variables.

Snap! uses less memory for separate data.

There is no benefit. Data should always be where it is needed. An input should be inside the input slot and not inside a variable.

How does turning on “turbo mode" affect blocks that make music?

Choose the correct answer.

It affects motion blocks, not music.

It blocks the user from interacting with the project while it is running.

It plays notes at breakneck speed without raising the pitch.

It provides a higher timing resolution and makes beats more precise.