Mobile App Dev - Unit 2: Programming (Diagnostic)

Which of the following is a programming language often used for mobile app development?

• HTML

• Python

• Photoshop

• Excel

Answer explanation

Python is a coding language. It is simple to read and write, and often used for apps. HTML makes websites, Photoshop edits pictures, and Excel is for spreadsheets.

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A variable in programming is best described as…

• A picture in an app

• A file stored in memory

• A container that holds data

• A step in a program’s loop

Answer explanation

A variable is like a box that stores information. In Roblox, a variable could track your score or how many coins you’ve collected.

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If/Else statements are used for…

• Repeating actions many times

• Making decisions in a program

• Drawing user interfaces

Answer explanation

If/Else tells the computer what to do when something happens. Example: If you click “like” on TikTok, it adds to your likes. Else, it does nothing.

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A loop in programming is used to…

• Store different kinds of data

• Repeat instructions until a condition is met

• Call other programs

• Encrypt information

Answer explanation

A loop repeats code. Think of YouTube autoplay—after one video ends, the next one starts in a loop until you stop it.

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Functions in programming are helpful because…

• They organize code into reusable parts

• They repeat code many times

• They are random commands

• They run without logic

Answer explanation

A function is like a recipe in a cookbook. Once you write it, you can use it over and over instead of retyping it every time.

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Debugging in programming means…

• Writing brand new code

• Finding and fixing errors in code

Answer explanation

Debugging is fixing mistakes. Just like fixing a broken controller before playing Fortnite, debugging fixes the code so it runs right.

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An IDE (Integrated Development Environment) is…

• A storage space for code

• A way to connect to Wi-Fi

• A software tool where you write, test, and run code

• A type of operating system

Answer explanation

An IDE is like a coding “workspace.” It’s where you write, test, and run code all in one place—like Visual Studio Code.

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Data types like integers, strings, and booleans are used to…

• Design the graphics of a program

• Set up Wi-Fi connections

• Define what kind of data is stored in variables

• Encrypt passwords

Answer explanation

Data types tell the program what kind of info is stored. Example: 100 is an integer, “GameOver” is a string, and True/False is a boolean.

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Which of the following is an example of event-based programming?

• A program that runs the same way every time

• An app reacting when you tap a button

• A file being saved automatically

• A loop that repeats endlessly

Answer explanation

Event-based programming responds to actions. Example: Tapping “play” on Spotify makes the song start.

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Operators like +, -, *, and / are used for…

• Making graphics look better

• Doing math with numbers in programs

• Saving information in the cloud

• Debugging errors

Answer explanation

Operators are math symbols in code. Example: In Minecraft, + could add to your health points.

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