2D Game Development 2D Game Design and Development 3

Question 1

What is 'collision detection' in a 2D game?

Accepted Answer

Determining when two game objects overlap or touch

Answer

Rendering shadows under sprites

Answer

Loading textures from disk

Answer

Compressing the game build

Question 2

An 'AABB' collision check refers to colliding what kind of shapes?

Accepted Answer

Axis-aligned bounding boxes

Answer

Arbitrary angled polygons

Answer

Animated bezier curves

Answer

Audio buffer blocks

Question 3

Why is 'delta time' used in game update loops?

Accepted Answer

To make movement frame-rate independent

Answer

To increase texture quality

Answer

To reduce memory usage

Answer

To encrypt save files

Question 4

In 2D physics, what does 'velocity' represent?

Accepted Answer

The rate of change of position over time

Answer

The total mass of an object

Answer

The color of a sprite

Answer

The friction coefficient only

Question 5

What is a common technique to handle a character jumping in a 2D platformer?

Accepted Answer

Apply an upward velocity then a constant downward gravity each frame

Answer

Teleport the player to a fixed height instantly

Answer

Disable collision while jumping

Answer

Increase the frame rate during the jump

Question 6

What does 'pixel-perfect' collision detection mean?

Accepted Answer

Collisions based on overlapping non-transparent pixels

Answer

Collisions only on screen edges

Answer

Collisions checked once per level

Answer

Collisions using only bounding circles

Question 7

Which is an advantage of bounding-box collision over pixel-perfect collision?

Accepted Answer

It is much faster to compute

Answer

It is always more accurate

Answer

It uses no CPU at all

Answer

It works only in 3D