OpenGL OpenGL Buffers and Textures 2

Question 1

What is a Framebuffer Object (FBO) used for in OpenGL?

Accepted Answer

Rendering to off-screen textures or renderbuffers

Answer

An FBO lets you redirect rendering output to textures or renderbuffers instead of the default on-screen framebuffer.

Question 2

What OpenGL function generates mipmaps for the currently bound texture?

Accepted Answer

glGenerateMipmap

Answer

glGenerateMipmap(target) automatically builds all mipmap levels for the texture currently bound to target.

Question 3

Which OpenGL usage hint indicates that buffer data will be set once and drawn many times?

Accepted Answer

GL_STATIC_DRAW

Answer

GL_STATIC_DRAW tells the driver to optimize for data uploaded once and used repeatedly for drawing.

Question 4

What OpenGL function is used to define how vertex attribute data is interpreted from a bound VBO?

Accepted Answer

glVertexAttribPointer

Answer

glVertexAttribPointer specifies the size, type, stride, and offset of a vertex attribute within the currently bound VBO.

Question 5

Which internal format provides a 32-bit floating-point depth attachment for a framebuffer?

Accepted Answer

GL_DEPTH_COMPONENT32F

Answer

GL_DEPTH_COMPONENT32F allocates a 32-bit float depth buffer, giving maximum depth precision.

OpenGL Practice Test