Open GL Question:

How to apply color to a geometrical object? Give the syntax of glColor3f() method.
What is difference between glColor3f() & glClearColor() ?
Under which circumstances glFlush() method is used? How it is different from glFinish()?
What kind of restrictions OpenGL imposes on primitive polygons? Why?
Specify the syntax of rendering a vertex in OpenGL.
Using glBegin() & glEnd() how do we create primitive geometric drawings such as quadrilaterals, polygons etc?
What are vertex arrays? How do they help in increasing performance of application?
What are interleaved arrays? Where they are used?
How to construct curved surfaces using polygon approximations?
Explain 3d viewing pipline.