Unit 3: 3D concepts for game play - Practice Quiz

1 What is the main purpose of a controller in a 3D game?

2 Which device is commonly used as a game controller?

3 Which input is often used to move a character in a 3D game?

4 What does a button press usually produce in a game?

5 What is controller mapping?

6 Which controller input is commonly used to make a character jump?

7 What does a controller script usually help manage?

8 What is procedural terrain generation?

9 Which feature can procedural generation create in a game world?

10 What is a height map commonly used for?

11 What can noise functions help create in procedural terrain?

12 What is one advantage of procedural terrain generation?

13 What does a seed commonly control in procedural generation?

14 Why might a game use a procedural terrain system?

15 What does AI usually control in a game?

16 What is an NPC?

17 What can an AI-controlled enemy do?

18 What is pathfinding used for in a 3D game?

19 What does a game AI decision system determine?

20 Which behavior is an example of game AI?

21 A third-person character moves faster diagonally than along a single axis because horizontal and vertical inputs are added directly. What should the developer do before applying movement speed?

22 A character should move forward relative to the camera rather than relative to the world's -axis. Which movement direction should be used?

23 A physics-based player controller applies movement forces in the frame update method. The player moves differently at different frame rates. What is the best correction?

24 A jumping character can repeatedly jump while airborne. Which condition should be checked before accepting a normal jump input?

25 A controller reads joystick input with magnitude , causing the character to drift even when the joystick appears centered. Which solution is most appropriate?

26 A character moving at velocity units per second must come to rest smoothly in seconds using constant deceleration. What deceleration magnitude is required?

27 A third-person character instantly rotates toward each new movement direction, making turns look unnatural. Which technique provides smoother turning?

28 A terrain generator produces a heightmap in which neighboring vertices often have completely unrelated heights, creating harsh spikes. Which change would most directly create smoother terrain?

29 Two terrain chunks use the same procedural algorithm but show a visible height discontinuity at their shared boundary. What is the most likely cause?

30 A developer increases the frequency of a noise function while keeping its amplitude unchanged. How will the generated terrain usually change?

31 A height value is produced in the range . The terrain's maximum elevation is units. Which expression correctly converts into an elevation?

32 An open-world game needs distant terrain to render efficiently while preserving detailed terrain near the player. Which technique is most suitable?

33 A developer combines several noise layers. Low-frequency layers use large amplitudes, while high-frequency layers use small amplitudes. What result is this intended to produce?

34 A procedurally generated multiplayer map must be identical for every player. Which approach best supports this requirement?

35 An enemy should patrol until it sees the player, chase while the player is visible, and search briefly after losing sight. Which AI structure is well suited to these clearly defined modes?

36 An NPC must navigate around static walls to reach a target on a baked navigation mesh. Which technique should be used to compute a suitable route?

37 A guard detects the player through a solid wall because detection uses only distance. Which additional test should be added?

38 A utility-based AI assigns attack a score of , flee a score of , and heal a score of . If it always selects the highest-scoring valid action, what will it choose?

39 Several enemies using steering behavior crowd into the same position while chasing the player. Which behavior should be added to reduce overlap?

40 An AI opponent reacts perfectly to the player's position even when the player is hidden, making the game feel unfair. Which design change best improves perceived fairness?

41 A game samples input once per rendered frame but simulates character physics at a fixed timestep. During a brief frame-rate drop, a jump button press occurs entirely between two physics updates. Which controller design most reliably supports both jump buffering and coyote time?

42 A character with desired horizontal velocity should move tangentially along a walkable slope with unit normal , without gaining an artificial component into the surface. Which velocity transformation is appropriate?

43 In a client-predicted controller, the server sends an authoritative state for tick 120 and confirms that input sequence 87 was the last processed command. The client has already predicted sequences 88 through 96. What should reconciliation do?

44 A third-person controller must produce stable camera-relative ground movement even when the camera can pitch almost vertically. Which mapping avoids degeneracy caused by projecting a near-vertical camera-forward vector onto the ground?

45 A kinematic capsule can move farther than its diameter in one simulation step. Which collision strategy best prevents tunneling while preserving sliding around corners?

46 An animation-driven character uses root motion, but its root delta would move it through a wall. Which integration order best preserves animation intent without bypassing collision constraints?

47 A character standing still on the edge of a rotating platform should remain attached without inheriting spurious velocity when the platform rotates. Which technique handles both translation and rotation correctly?

48 Two terrain chunks independently generate their shared border, but tiny cracks appear despite using the same noise parameters. Which design most directly guarantees numerically identical border heights?

49 A height field is sampled on a grid with spacing . It uses noise octaves with base frequency and lacunarity . Ignoring the noise kernel's residual high-frequency content, which condition keeps the highest octave below the grid's Nyquist limit?

50 Chunks are generated asynchronously, so their generation order varies between runs. Which randomization method preserves the same terrain for a fixed world seed regardless of scheduling?

51 Terrain normals are computed with central differences, but lighting seams appear between chunks whose vertex heights match exactly. What is the most appropriate correction?

52 Adjacent voxel-terrain chunks use different mesh resolutions. Their scalar-field samples are consistent, but cracks appear where a coarse mesh meets a fine mesh. Which solution is specifically intended for this LOD transition problem?

53 In a closed hydraulic-erosion simulation with no material entering or leaving the domain, which update rule preserves terrain-material mass during erosion and deposition?

54 Two neighboring biomes use different height functions and surface materials. A smooth biome mask is available, but a visible ridge and shading seam remain at their boundary. Which pipeline best addresses both discontinuities?

55 An A* navigation graph uses world-space edge lengths multiplied by terrain costs, and every terrain multiplier is at least . Which heuristic is admissible and consistent?

56 A behavior-tree agent performs a long attack sequence. An urgent dodge condition becomes true midway through the attack, but the agent does not react until the attack finishes. Which structural change provides immediate, controlled interruption?

57 A utility-based agent alternates every frame between two actions whose scores differ only by sensor noise. Which modification most directly reduces this oscillation without permanently fixing action priority?

58 A destructible wall changes only a small region of a large tiled navigation mesh. Many agents currently hold paths, some of which cross that region. Which update strategy best balances correctness and runtime cost?

59 In a networked competitive game, AI decisions use random choices and depend on authoritative world state. Which architecture most reliably prevents clients from observing divergent AI behavior?

60 A pursuer at the origin can move at constant speed . A target has relative position and constant velocity . Which equation yields candidate interception times under the assumption that the pursuer travels directly to the future target position?