20 Unreal Engine Interview Questions and Answers

Unreal Engine is a powerful game engine that is used to create AAA games. When applying for a position that involves Unreal Engine, it is important to be prepared for the interview process. In this article, we will discuss some of the most common Unreal Engine interview questions and how you can answer them.

Unreal Engine Interview Questions and Answers

Here are 20 commonly asked Unreal Engine interview questions and answers to prepare you for your interview:

1. What is Unreal Engine?

Unreal Engine is a game engine developed by Epic Games. It is a powerful tool that allows developers to create high-quality 3D games. The engine is used by many AAA game developers, and it has been used to create some of the most popular games of all time, such as Fortnite, Gears of War, and Borderlands.

2. Can you briefly explain the history of Unreal Engine?

Unreal Engine was originally developed by Epic Games in the late 1990s. It was first used in the 1998 game Unreal, and has since been used in a number of other games. The engine is now in its fourth iteration, and is used by developers all over the world to create a variety of different games.

3. When did Epic Games first release Unreal Engine?

Unreal Engine was first released in 1998.

4. What are some popular games built using Unreal Engine?

Some popular games that have been built using Unreal Engine include Gears of War, Mass Effect, and Borderlands.

5. How many versions of Unreal Engine have been released so far?

As of July 2020, there have been six major versions of Unreal Engine released: 1, 2, 3, 4, 5, and 6.

6. What’s the difference between the various versions of Unreal Engine?

The main difference between the various versions of Unreal Engine is the licensing model. The original Unreal Engine was released under a shareware license, meaning that anyone could use it for free as long as they agreed to share any modifications they made. The second version was released under a more traditional commercial license. The current version, Unreal Engine 4, is available for free for anyone to use, with a small royalty fee charged for any games or applications that are sold commercially.

7. What tools and technologies does Unreal Engine support?

Unreal Engine supports a number of different tools and technologies, including C++, Blueprint, and the Unreal Editor. It also has a number of features that make it ideal for developing games, including a robust physics engine, a powerful rendering engine, and support for a wide range of platforms.

8. Is it possible to use C++ while developing with Unreal Engine 4? If yes, then how?

Yes, it is possible to use C++ while developing with Unreal Engine 4. The engine provides a set of tools and templates that allow you to easily create C++ code that integrates with the engine. You can also use the engine’s Blueprint system to create C++ code that can be used in your game.

9. How do you create a custom class in Unreal Engine?

You can create a custom class in Unreal Engine by deriving a new class from an existing class. To do this, you need to use the class keyword followed by the name of the new class and the name of the existing class that it will be derived from. For example, if you wanted to create a custom class called MyCustomClass that was derived from the existing class MyExistingClass, you would use the following code:

class MyCustomClass : public MyExistingClass
{
public:
MyCustomClass();
~MyCustomClass();
};

10. What are the different types of UObjects that can be used with Unreal Engine?

The different types of UObjects that can be used with Unreal Engine are:

– Actors
– Components
– Pawns
– PlayerControllers
– GameModes
– GameStates
– HUDs
– UUserWidget

11. How would you go about creating an object pool for actors in Unreal Engine?

An object pool for actors in Unreal Engine would likely be created using the UObjectPool class. This class allows for the creation of a pool of objects that can be reused, which would be perfect for actors that need to be created and destroyed frequently. To create an object pool, you would first need to create a subclass of UObjectPool, and then override the CreateObject and DestroyObject methods.

12. How do you add a new module in your game project in Unreal Engine 4?

In the Unreal Engine 4 game project editor, go to the “Modules” section. Click on the “Add New Module” button. A window will pop up asking you to choose the module type. Select the module type you want to add and click “OK.”

13. Does Unreal Engine provide any features for debugging? If yes, then what are they?

Unreal Engine provides a number of features for debugging, including the ability to break into the engine at specific points in order to examine the state of the engine and the game. Additionally, Unreal Engine provides a number of tools for profiling game performance and for examining game logs.

14. What is Lightmass and why is it important for Unreal Engine?

Lightmass is the Unreal Engine’s global illumination solution. It is important because it is responsible for creating realistic lighting in Unreal Engine-based games. Without Lightmass, games would look significantly less realistic and would not be as visually appealing.

15. What is the best way to set up lighting for my scene?

There is no one-size-fits-all answer to this question, as the best way to set up lighting for a scene will vary depending on the specific requirements of the scene. However, some general tips that may be helpful include using a mix of light sources (e.g. directional, point, and spotlights) to create a more realistic lighting environment, and using lightmaps to bake lighting into static objects in the scene to improve performance.

16. What are instances and instance groups?

Instances are individual objects that exist in a level, while instance groups are collections of objects that can be treated as a single unit. Instance groups are useful for managing large numbers of objects, or for creating prefabs that can be reused in other levels.

17. What is the main role of Actors in Unreal Engine?

Actors are the objects that populate the world in Unreal Engine. Actors can be static objects like buildings or furniture, or they can be dynamic objects like characters or vehicles. Actors can also be invisible objects that control the behavior of other Actors, like triggers or sensors.

18. Are there any known performance issues with Unreal Engine? If yes, then what are they and how can they be fixed?

There are a few known performance issues with Unreal Engine, but they can all be fixed with a few simple tweaks. One issue is that Unreal Engine can be quite resource-intensive, so it is important to make sure that your computer is powerful enough to run it smoothly. Another issue is that Unreal Engine can sometimes have trouble loading large levels, but this can be fixed by breaking the level up into smaller chunks. Finally, Unreal Engine can sometimes have problems with collision detection, but this can be fixed by increasing the size of the collision detection boxes.

19. Can you give me an example of how Blueprints work in Unreal Engine?

Blueprints are a visual scripting system used in Unreal Engine. They allow developers to create game logic without writing code. With Blueprints, developers can create objects, add variables, and create event-driven logic.

20. What is your experience with Blueprint scripting?

I have experience with Blueprint scripting in Unreal Engine 4. I am familiar with the basic concepts of Blueprint scripting and how to create simple scripts. I have also created some more complex scripts, such as those that control AI behavior.