Game Design - Unity Create with Code Units 1-5 Test

By default, what will be the first state used by this Animation Controller? Ex: Crouch_Down Crouch_Up Entry Crouch_Idle NotCrouched Death Any State Death_01 Death_02 Dead_01 Dead_02

"NotCrouched"

Based on the code below, what will be displayed in the console when the button is clicked? Ex: private Button button; private string firstName = "Robert"; void Start() { button = GetComponent<Button>(); button.onClick.AddListener(DisplayWelcomeMessage); Debug.Log("Button is ready"); } void DisplayWelcomeMessage() { Debug.Log("Welcome, " + "firstName" + " Smith"); }

"Welcome, firstName Smith"

If you wanted a button to display the message, "Hello!" when a button was clicked, what code would you use to fill in the blank?

(SendMessage);

What comment best describes the following code? Ex: public class PlayerController : MonoBehaviour { // Comment private void OnTriggerEnter(Collider other) { Destroy(other.gameObject); } }

// If player collides with another object, destroy the object

What comment best describes the code below? Ex: public class Enemy : MonoBehaviour { // Comment private void OnTriggerEnter(Collider other) { if(other.CompareTag("Spike")) { Destroy(other.gameObject); } } }

// If the enemy collides with a spike, destroy the spike

If there is a boolean in script A that you want to access in script B, which of the following are true? Ex: 1.) You need a reference to script A in script B 2.) The boolean needs to be public instead of private 3.) The boolean must be true 4.) The boolean must be included in the Update method

1 and 2 only

Which of the following variable declarations observes Unity's standard naming conventions (especially as it relates to capitalization)? Ex: 1.) private Animator anim; 2.) private player Player; 3.) Float JumpForce = 10.0f; 4.) bool gameOver = True; 5.) private Vector3 startPos; 6.) Public gameObject ObstaclePrefab;

1 and 5

UNIT 5- Which of the following follows Unity naming conventions (especially as they relate to capitalization)? Ex: 1.) public void MultiplyScore(int currentScore) { } 2.) public void multiplyScore(int CurrentScore) { } 3.) public Void MultiplyScore(Int currentScore) { } 4.) public Void MultiplyScore (int CurrentScore) { }

1.

Read the Unity documentation below about the OnMouseDrag event and the code beneath it. What will the value of the "counter" variable be if the user clicked and held down the mouse over an object with a collider for 10 seconds? Ex: MonoBehaviour.OnMouseDrag() Description- OnMouseDrag is called when the user has clicked on a GUIElement or Collider and is still holding down the mouse. OnMouseDrag is called every frame while the mouse is down. int counter = 0; void OnMouseDrag() { if (counter < 100) { counter++; } }

100

Match the following animation methods with its set of parameters 1.) anim.SetBool(_____); a.) "Celebrate" 2.) anim.SetTrigger(_____); b.) "Alive", true 3.) anim.SetInt(_____); c.) "ThrowType", 2

1B, 2A, 3C

You're trying to create some logic that will tell the user to speed up if they're going too slow or to slow down if they're going too fast. How should you arrange the lines of code below to accomplish that? Ex: 1. Debug.Log(speedUp); } 2. else if (speed > 60) { 3. private string speedUp = "Speed up!"; 4. void Update() { 5. Debug.Log(slowDown); } 6. if (speed < 10) { 7. private float speed; 8. private string slowDown = "Slow down!"; 9. }

7, 8, 3, 4, 6, 1, 2, 5, 9 Ex: private float speed; private string slowDown= "Slow down!"; private string speedUp = "Speed up!"; void Update() { if (speed < 10) { Debug.Log(speedUp); } else if (speed > 60) { Debug.Log(slowDown); } }

UNIT 4- You're trying to write some code that creates a random age between 1 and 100 and prints that age, but there is an error. What would fix the error? Ex: 1.) private int age; 2.) 3.) void Start() { 4.) Debug.Log(GenerateRandomAge()); 5.) } 6.) 7.) private int GenerateRandomAge() { 8.) age = Random.Range(1, 101); 9.) }

Add a new line after line 8 that says "return age;"

Your game has just started and you see the error, "UnassignedReferenceException: The variable playerIndicator of PlayerController has not been assigned." What is likely the solution to the problem? Ex: public class PlayerController : MonoBehaviour { public GameObject playerIndicator; void Update() { playerIndicator.transform.position.y = 10; } }

An object needs to be dragged onto the playerIndicator variable in the inspector

UNIT 2- If it says, "Hello there!" in the console, what was the code used to create that message?

Debug.Log("Hello there!");

The code below creates an error that says, "error CS1503: Argument 1: cannot convert from 'UnityEngine.GameObject[]' to 'UnityEngine.Object'". What could you do to remove the errors? Ex: 1. public GameObject[] enemyPrefabs; 2. 3. void Start() 4. { 5. Instantiate(enemyPrefabs); 6. }

Either: On line 1, change "GameObject[]" to "GameObject" On line 5, change "enemyPrefabs" to "enemyPrefabs[0]" (BUT NOT BOTH)

UNIT 1- Which Unity window contains a list of all the game objects currently in your scene?

Hierarchy

Which of the following do you think makes the most sense for a simple movement state machine? Image A. Orange Idle, Green Entry, Blue Any State, Grey Walk, Grey Run, and Triangle connecting Idle, Walk, and Run Image B. Grey Idle, Green Entry, Blue Any State, Orange Walk, Grey Run, and 2 lines that look like > connecting Idle, Run, and Walk. Image C. Orange Idle, Green Entry, Blue Any State, Grey Walk, Grey Run, and 2 lines that look like an upside-down V connecting Idle, Walk, and Run

Image A. Idle should be the default state, then, go to either walking or running.

You run your game and get the following error message in the console, "NullReferenceException: Object reference not set to an instance of an object". Given the image and code below, what would resolve the problem? Ex: 1.) private GameManager gameManager; 2.) void Start() { 3.) gameManager = GameObject.Find("GameManager").GetComponent<GameManager>(); 4.) }

In the hierarchy, rename "Game Manager" as "GameManager"

If you want to move the character up continuously as the player presses the up arrow, what code would be best in the two blanks below? Ex: if (Input.________(_______)) { transform.Translate(Vector3.up); }

Input.GetKey(KeyCode.UpArrow)

Read the documentation from the Unity Scripting API below. What is a correct use of the InvokeRepeating method? Ex: public void Invoke Repeating(string methodName, float time, float repeatRate); Description- Invokes the method methodName in time seconds, then repeatedly every repeatRate seconds.

InvokeRepeating("Spawn", 0.5, 1.0f);

Which of the following is the correct way to declare a new List of game objects named "enemies"? Ex: 1.) public List[GameObjects] enemies; 2.) public List(GameObject) "enemies"; 3.) public List<GameObjects> "enemies"; 4.) public List<GameObject> enemies;

Line 4

You are trying to randomly spawn objects from an array. However, when your game is running, you see in the console that there was an "error at Assets/Scripts/SpawnManager.cs:5. IndexOutOfRangeException: Index was outside the bounds of the array." Which line of code should you edit in order to resolve this problem and still retain the random object functionality? Ex: 1. public GameObject[] randomObjects; 2. 3. void SpawnRandomObject() { 4. int objectIndex = Random.Range(0, 3); 5. Instantiate(randomObjects[objectIndex]); 6. }

Line 4 should be changed to "Random.Range(0, randomObjects.Length);"

Look at the documentation and code below. Which of the following lines would NOT produce an error? Ex: public void AddForceAtPosition(Vector3 force, Vector3 position, ForceMode mode = ForceMode.Force); Parameters- force = Force vector in world coordinates. position = Position in world coordinates. Description- Applies force at position. As a result this will apply a torque and force on the object. 1.) public Vector3 explosion; 2.) Vector3 startPos; 3.) float startSpeed; 4.) voidStart { 5.) AddForceAtPosition(50, 0, ForceMode.Impulse) 6.) AddForceAtPosition(100, startPos, ForceMode.Impulse) 7.) AddForceAtPosition(startSpeed, startPos, ForceMode.Impulse) 8.) AddForceAtPosition(explosion, new Vector3(0, 0, 0), ForceMode.Impulse) 9.) }

Line 8

You are trying to create a new method that takes a number and multiplies it by two. Which method would do that? Ex: a.) private float DoubleNumber() { return number *= 2; } b.) private float DoubleNumber(float number) { return number *= 2; } c.) private void DoubleNumber(float number) { return number *= 2; } d.) private void DoubleNumber() { return number *= 2; }

Method B

Which of the following statements about functions/methods are correct? Ex: a.) Functions/methods must be passed at least one parameter b.) Functions/methods with a "void" return type cannot be passed parameters c.) A Function/method with an "int" return type could include the code, "return 0.5f;" d.) If there was a function/method declared as "private void RenameObject(string newName)", you could call that method with "RenameObject();"

None are correct

The code below produces "error CS0029: Cannot implicitly convert type 'float' to 'UnityEngine.Vector3'". Which of the following would remove the error? Ex: 1.) private Vector3 startingVelocity; 2.) void Start() { 3.) startingVelocity = 2.0f; 4.) }

On line 1, change "Vector3" to "float"

The code below produces the error, "error CS0029: Cannot implicitly convert type 'UnityEngine.GameObject' to 'UnityEngine.Rigidbody'". What could be done to fix this issue? Ex: 1.) void OnCollisionenter(Collision collision) { 2.) if(collision.gameObject.CompareTag("Enemy")) { 3.) Rigidbody enemyRb = collision.gameObject; 4.) } 5.) }

On line 3, add ".GetComponent<Rigidbody>()" before the semicolon

Which comment would best describe the code below? Ex: horizontalInput = Input.GetAxis("Horizontal"); transform.Rotate(Vector3.up, horizontalInput);

Rotates around the Y axis based on left/right arrow keys

Which of the following is most likely the condition for the transition between "Run" and "Walk" shown below? Ex: Walk Run a.) Jump_b true b.) Speed_f Less 0.5 c.) Speed_f Greater 0.5 d.) Animation_int Less 10

Speed_f is Less than 0.5

If you have made changes to a prefab in the scene and you want to apply those changes to all prefabs, what should you click?

The "Overrides" drop-down at the top of the Inspector

UNIT 3- You are trying to STOP spawning enemies when the player has died and have created the two scripts below to do that. However, there is an error on the underlined code, "isAlive" in the EnemySpawner script. What is causing that error? Ex: public class PlayerController : MonoBehaviour { bool isAlive; ... } public class EnemySpawner : MonoBehaviour { void Start() { playerController = GameObject.Find("player").GetComponent<PlayerController>(); } void Update() { if (playerController.isAlive == false) { StopSpawning(); } } }

The "bool" in the PlayerController class needs a "public" access modifier

You are trying to assign the powerup variable in the inspector, but it is not showing up in the Player Controller component. What is the problem? Ex: public class PlayerController : MonoBehaviour { private GameObject powerup; }

The powerup variable should be public instead of private

What best describes the difference between the below images, where the car is in the second image is further along the road? Image 1: Car is at bottom of the screen Image 2: Car is at the top of the screen

The second car's Z location value is higher than the first car's

When you run a project with the code below, you get the following error: "NullReferenceException: Object reference not set to an instance of an object." What is most likely the problem? Ex: public class Enemy : MonoBehaviour { void Start() { player = GameObject.Find("Player"); } void OnTriggerEnter(Collider other) { if (player.transform.position.z > 10) { Destroy(other.gameObject); } } }

There is no object named "Player" in the scene

What is true about the following two lines of code? Ex: transform.Translate(Vector3.forward); transform.Translate(1, 0, 0);

They will both move an object the same distance

True or False: Visual Studio is not a part of Unity. You could use a different code editor to edit your C# scripts if you wanted to.

True

You have declared a new Button variable as "private Button start;", but there's an error under the word "Button" that says "error CS0246: The type or namespace name 'Button' could not be found (are you missing a using directive or an assembly reference?)" What is likely causing that error?

You are missing "using UnityEngine.UI;" from the top of your class

In what order do you put the words when you are declaring a new variable? Ex: public float speed = 20.0f;

[Access modifier] [Data type] [Variable name] [Variable value]

To change which script editing toll (or IDE) you want to use, where would you click to choose an alternative code editing tool? Ex: a.) External Script Editor b.) Image Application c.) Revision control Diff/Merge

a.

Which of the following follows Unity's naming conventions (especially as it relates to capitalization)? Ex: a.) float forwardInput = Input.GetAxis("Vertical"); b.) float ForwardInput = input.GetAxis("Vertical"); c.) Float forwardInput = Input.getAxis("Vertical"); d.) float forwardInput = input.getAxis("vertical");

a.

Which of the following variables would be visible in the Inspector? Ex: a.) speed b.) turnSpeed c.) speed & turnSpeed d.) horizontalInput & forwardInput

a.

Which of these is the correct way to get a reference to an AudioSource component on a GameObject? Ex: a.) audio = GetComponent<AudioSource>(); b.) audio = GetComponent(AudioSource)<>; c.) audio = AudioSource.GetComponent<>(); d.) audio = GetComponent.Audio<Source>;

a.

The following message was displayed in the console: "Monica has 20 dollars". Which of the line options in the PrintNames function produced it? Ex: string[] names = new string[] { "Steve", "Monica", "Eric" }; int money = 5; void Start() { money *= 2; PrintNames(); } void PrintNames () { a.) Debug.Log("Monica has " + money/2 + " dollars"); b.) Debug.Log(names[1] + " has " + money*2 + " dollars"); c.) Debug.Log(names[2] + " has " + money*2 + " dollars"); d.) Debug.Log(names[Monica] + " has " + money/2 + " dollars");

b.

What is a possible value for the horizontalInput variable? Ex: a.) -10 b.) 0.52 c.) "Right" d.) Vector3.Up

b.

Which of the following conditions properly tests that the game is NOT over and the player IS on the ground a.) if (gameOver == false AND isOnGround) b.) if (gameOver && isOnGround == true) c.) if (gameOver != true && isOnGround) d.) if (gameOver != false && isOnGround == true)

c.

Which of the following lines of code is using standard Unity naming conventions? Ex: a.) Public Float Speed = 40.0f; b.) public float Speed = 40.0f; c.) public float Speed = 40.0f; d.) public float speed = 40.0f;

d.

If you want to destroy an object when its health reaches 0, what code would be best in the blank below? Ex: private int health = 0; void Update() { if (________) { Destroy(gameObject); } }

health < 1

What code to fill in the blank will result in the object being destroyed? Ex: string name = "player" bool isDead; float health = 3; if (______________) { Destroy(gameObject); }

name == "player" && !isDead && health < 5

Read the documentation from the Unity Scripting API and the code below. What are possible values for the randomFloat and randomInt variables? Ex 1: public static float Range(float min, floatmax); Description- Return a random float number between min [inclusive] and max [inclusive] (Read Only). Note max is inclusive. Random.range(0.0f, 1.0f) can return 1.0 as the value. The Random.Range distribution is uniform. Range is a Random Number Generator. Ex 2: public static int Range(int min, int max); Description- Return a random integer number between min [inclusive] and max [exclusive] (Read Only). Note max is exclusive. Random.Range(0, 10) can return a value between 0 and 9. Return min if max equals min. the Random.Range distribution is uniform. Range is a Random Number Generator. float randomFloat = Random.Rnage(0f, 100f); int randomInt = Random.Range(0, 100);

randomFloat = 100.0f; randomInt = 0;

Given the animation controller / state machine below, which code will make the character transition from the "Idle" state to the "Walk" state?

setFloat("Speed_f", 0.3f);