Build settings configuration in Unity - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this Unity build settings code?

Consider this C# script snippet that prints the active build target in Unity. What will it print when run in the Unity Editor?

Unity

using UnityEditor;
using UnityEngine;

public class BuildTargetCheck : MonoBehaviour
{
    void Start()
    {
        Debug.Log(EditorUserBuildSettings.activeBuildTarget);
    }
}

A StandaloneWindows64

B Android

C iOS

D WebGL

💡 Hint

Check the default build target in Unity Editor's Build Settings window.

The default active build target in Unity Editor on Windows is usually StandaloneWindows64 unless changed.

🧠 Conceptual

intermediate

Which build setting controls the scripting backend in Unity?

In Unity's build settings, which option controls whether you use Mono, IL2CPP, or other scripting backends?

A Player Settings > Other Settings > Scripting Backend

B Build Settings > Scenes In Build

C Player Settings > Resolution and Presentation

D Build Settings > Platform

💡 Hint

Look inside Player Settings under Other Settings.

The scripting backend is set in Player Settings under Other Settings, not directly in Build Settings.

❓ Predict Output

advanced

What happens when you call BuildPipeline.BuildPlayer with an empty scenes array?

Given this code snippet, what will be the result?

Unity

using UnityEditor;

public class BuildTest
{
    public static void BuildEmptyScenes()
    {
        BuildPlayerOptions options = new BuildPlayerOptions();
        options.scenes = new string[] {};
        options.locationPathName = "Builds/MyGame.exe";
        options.target = BuildTarget.StandaloneWindows64;
        options.options = BuildOptions.None;

        var report = BuildPipeline.BuildPlayer(options);
        UnityEngine.Debug.Log(report.summary.result);
    }
}

A BuildResult.Succeeded

B BuildResult.Failed

C BuildResult.Cancelled

D Throws an exception

💡 Hint

Think about what happens if no scenes are included in the build.

Building with no scenes results in a failed build because Unity requires at least one scene.

🔧 Debug

advanced

Why does this build script fail to switch platform before building?

Examine this script that tries to switch build platform and then build. Why does it fail to build for Android?

Unity

using UnityEditor;

public class BuildScript
{
    public static void BuildAndroid()
    {
        EditorUserBuildSettings.SwitchActiveBuildTarget(BuildTargetGroup.Android, BuildTarget.Android);
        BuildPlayerOptions options = new BuildPlayerOptions();
        options.scenes = new string[] {"Assets/Scene1.unity"};
        options.locationPathName = "Builds/Android.apk";
        options.target = BuildTarget.Android;
        options.options = BuildOptions.None;

        BuildPipeline.BuildPlayer(options);
    }
}

A Scenes array must include all scenes in the project

B BuildTargetGroup.Android is invalid and causes failure

C SwitchActiveBuildTarget is asynchronous and build starts before switch completes

D BuildPlayerOptions.locationPathName is incorrect for Android builds

💡 Hint

Consider how platform switching works internally in Unity Editor.

SwitchActiveBuildTarget is asynchronous and may not complete before BuildPlayer runs, causing build failure.

🚀 Application

expert

How to programmatically add a scene to Build Settings in Unity?

You want to add a scene to the build settings list using a script. Which code snippet correctly adds "Assets/Scenes/Level1.unity" to the build scenes?

A BuildPipeline.AddSceneToBuild("Assets/Scenes/Level1.unity");

B EditorBuildSettings.scenes.Append(new EditorBuildSettingsScene("Assets/Scenes/Level1.unity", true));

C EditorBuildSettings.AddScene("Assets/Scenes/Level1.unity");

D var scenes = EditorBuildSettings.scenes.ToList(); scenes.Add(new EditorBuildSettingsScene("Assets/Scenes/Level1.unity", true)); EditorBuildSettings.scenes = scenes.ToArray();

💡 Hint

Think about how to modify arrays in C# and assign back to EditorBuildSettings.scenes.

EditorBuildSettings.scenes is an array. You must convert to a list, add the scene, then assign back the array.

Practice

1. What is the main purpose of Unity's Build Settings window?

easy

A. To debug runtime errors in the game

B. To write game scripts and logic

C. To select the target platform and scenes for building the game

D. To design game UI elements

Solution

1. Step 1: Understand Build Settings role

   The Build Settings window is where you choose the platform (like Windows, Android) and which scenes to include in the build.

2. Step 2: Differentiate from other windows

   Writing scripts, designing UI, and debugging happen in other parts of Unity, not Build Settings.

3. Final Answer:

   To select the target platform and scenes for building the game -> Option C

4. Quick Check:

   Build Settings = platform + scenes selection [OK]

Hint: Build Settings = choose platform and scenes before building [OK]

Common Mistakes:

• Confusing Build Settings with script editor
• Thinking Build Settings is for debugging
• Assuming UI design happens here

2. Which of the following is the correct way to add a scene to the Build Settings scenes list in Unity Editor?

easy

A. Add the scene path in the Player Settings

B. Write the scene name in the Console window

C. Create a new script and reference the scene

D. Drag the scene file into the Scenes In Build list in Build Settings

Solution

1. Step 1: Identify how to add scenes in Build Settings

   In Unity Editor, you add scenes by dragging them into the Scenes In Build list inside the Build Settings window.

2. Step 2: Eliminate incorrect methods

   Writing scene names in Console, adding paths in Player Settings, or scripting references do not add scenes to the build list.

3. Final Answer:

   Drag the scene file into the Scenes In Build list in Build Settings -> Option D

4. Quick Check:

   Add scenes by dragging into Build Settings list [OK]

Hint: Drag scenes into Build Settings list to include them [OK]

Common Mistakes:

• Trying to add scenes via Console or Player Settings
• Assuming scripts add scenes automatically
• Not opening Build Settings before adding scenes

3. Given this C# build script snippet in Unity Editor:

using UnityEditor;
class BuildScript {
  static void BuildGame() {
    string[] scenes = {"Assets/Scene1.unity", "Assets/Scene2.unity"};
    BuildPipeline.BuildPlayer(scenes, "Builds/MyGame.exe", BuildTarget.StandaloneWindows64, BuildOptions.None);
  }
}

What will this script do when run inside the Editor?

medium

A. Build a Windows 64-bit executable including Scene1 and Scene2

B. Build a MacOS app ignoring the scenes

C. Throw a compile error due to missing namespace

D. Build an Android APK with default scenes

Solution

1. Step 1: Analyze BuildPipeline.BuildPlayer parameters

   The script specifies scenes array with two scenes, output path "Builds/MyGame.exe", target platform StandaloneWindows64, and no special options.

2. Step 2: Understand effect of parameters

   This means it builds a Windows 64-bit executable including the two scenes listed.

3. Final Answer:

   Build a Windows 64-bit executable including Scene1 and Scene2 -> Option A

4. Quick Check:

   BuildPlayer with Windows target = Windows exe build [OK]

Hint: Check BuildTarget and output path to identify build platform [OK]

Common Mistakes:

• Confusing BuildTarget platform
• Assuming scenes are ignored
• Thinking script causes compile error

4. You wrote this build script in Unity Editor:

using UnityEditor;
class BuildScript {
  static void BuildGame() {
    string[] scenes = {"Assets/Scene1.unity", "Assets/Scene2.unity"};
    BuildPipeline.BuildPlayer(scenes, "Builds/MyGame.exe", BuildTarget.Android, BuildOptions.None);
  }
}

But the build fails with an error about invalid output path. What is the likely cause?

medium

A. The output path "Builds/MyGame.exe" is invalid for Android builds

B. The scenes array is empty

C. BuildTarget.Android is not supported in Unity

D. BuildOptions.None disables building

Solution

1. Step 1: Check output path for Android build

   Android builds require output files with .apk or .aab extensions, not .exe files.

2. Step 2: Identify mismatch causing error

   Using "Builds/MyGame.exe" for Android causes invalid path error because .exe is for Windows builds.

3. Final Answer:

   The output path "Builds/MyGame.exe" is invalid for Android builds -> Option A

4. Quick Check:

   Android build needs .apk or .aab output [OK]

Hint: Match output file extension to platform (e.g., .apk for Android) [OK]

Common Mistakes:

• Using Windows .exe extension for Android builds
• Assuming BuildTarget.Android is unsupported
• Thinking BuildOptions.None disables building

5. You want to automate building your Unity game for both Windows and Android platforms using a single script. Which approach correctly handles setting the build target and output path for each platform inside the script?

hard

A. Use one BuildPipeline.BuildPlayer call with BuildTarget.StandaloneWindows64 and output .exe for both platforms

B. Use BuildPipeline.BuildPlayer twice with different BuildTarget and matching output paths (.exe for Windows, .apk for Android)

C. Use BuildPipeline.BuildPlayer with BuildTarget.Android and output .exe file

D. Change Player Settings manually before running the script

Solution

1. Step 1: Understand multi-platform build requirements

   Each platform requires a separate build call with correct BuildTarget and output file extension.

2. Step 2: Identify correct scripting approach

   Calling BuildPipeline.BuildPlayer twice, once for Windows with .exe output, once for Android with .apk output, automates both builds properly.

3. Final Answer:

   Use BuildPipeline.BuildPlayer twice with different BuildTarget and matching output paths (.exe for Windows, .apk for Android) -> Option B

4. Quick Check:

   Separate calls per platform with correct output = correct build [OK]

Hint: Build each platform separately with correct target and output file [OK]

Common Mistakes:

• Trying to build multiple platforms in one call
• Using wrong output file extensions
• Changing Player Settings manually instead of scripting