Which values can be used with glTexParameter and GL_TEXTURE_MAG_FILTER parameter names?

When a matrix has been popped from the stack, is it possible to read it again?

What does glGetMinmax do?

Is the following code correct?

OpenGL can draw convex polygons. Can it draw non-convex ones?

What will be the size of the quad drawn by the following code on the screen?

What is the dimensions of a 2D transformation matrix?

Fill in the blank to draw this triangle: glBegin(GL_TRIANGLES); ....(blank).... glEnd();

What is "core" versus "compatibility" styles of writing OpenGL applications?

Does OpenGL perform clipping for objects not within the current viewport?

What function is required in every GLSL shader program?