Understanding Code Variables and Functions

This video tutorial introduces using built-in datasets in App Lab on code.org. It guides through setting up a simple app with a button, label, and image to display random cat names and images from a dataset. The tutorial covers importing datasets, coding to read and display data, and using randomization to enhance the app's functionality. It concludes with finalizing the app and cleaning up the code.

What is the primary purpose of the button, label, and image in the App Lab design mode?

• To create a user interface for displaying random cat names and images

• To test the functionality of App Lab

• To display Spotify top songs

• To import data sets

Which of the following is NOT a built-in data table mentioned in the video?

• Spotify top 200 songs

• Top movies

• Top spoken languages

• Top books

What must be done to use a data set in your code after previewing it?

• Share it

• Copy it

• Import it

• Download it

What is the purpose of the 'on event' function in the code setup?

• To execute code when the button is clicked

• To log data to the console

• To import data sets

• To display images

Why were the cat names initially undefined in the console log?

• The button was not clicked

• The column name was incorrect

• The image link was broken

• The data set was not imported

What change was necessary to fix the undefined names issue?

• Use a different data set

• Change the column name to uppercase

• Change the column name to lowercase

• Re-import the data set

What is the purpose of generating a random number in the code?

• To select a random cat name and image

• To shuffle the data set

• To sort the data set

• To count the number of records

Where should the 'set property' function be placed in the code?

• Inside the for loop

• Outside the records read

• At the beginning of the code

• Inside the records read but outside the for loop

What does the 'records' variable represent in the code?

• A list of all cat images

• A list of all cat names

• A random selection of data

• The entire data set

What happens when the button is clicked after the code is completed?

• The app resets

• The console log is cleared

• A random cat name and image are displayed

• The data set is re-imported