OpenGL OpenGL Shaders

Question 1

Which language is used to write shaders in OpenGL?

Accepted Answer

GLSL

Answer

HLSL

Answer

Cg

Answer

Metal

Question 2

Which built-in GLSL variable holds the final position of a vertex in clip space?

Accepted Answer

gl_Position

Answer

gl_FragCoord

Answer

gl_VertexID

Answer

gl_ClipDistance

Question 3

What OpenGL function is used to compile a shader object?

Accepted Answer

glCompileShader

Answer

glLinkProgram

Answer

glShaderSource

Answer

glAttachShader

Question 4

What qualifier is used in GLSL to declare a variable that passes data from the vertex shader to the fragment shader?

Accepted Answer

out/in

Answer

uniform

Answer

attribute

Answer

const

Question 5

What is a 'uniform' variable in GLSL?

Accepted Answer

A constant set by the CPU that is the same across all shader invocations

Answer

A variable that changes per vertex

Answer

A variable shared between two fragment shaders

Answer

An output written to the framebuffer

Question 6

Which OpenGL function links compiled shader objects into a program object?

Accepted Answer

glLinkProgram

Answer

glCompileShader

Answer

glBindProgram

Answer

glUseProgram