Which WebGL function allows the view volume to be asymmetric (not symmetric)?

What kind of shadow is described by the following?

The areas that are fully in shadow. The portion of shadow that blocks direct light altogether. 

Which of the following illustrates ambient light?

A polygon is drawn first, and then lines. But some fragments on the line are displayed behind the corresponding fragment on the polygon (triangle) (this is called Z-fighting as we see in the figure below) due to small numerical errors. What WebGL function is used to resolve this issue? 

Which matrix is the projection matrix corresponding to perspective(fovy,

aspect,

near, far) by using symmetry:

left =−right

Which of the following is the Frustum projection matrix?

What is described by the following?

This is a way to simulate shadows. We create this from the light's perspective by calculating the distances from the light source to the nearest lit fragment. We store these depths in this (a texture). During the final rendering, we compare the distance from the fragment to the light source with the distance in this. If the depth in this is less than the distance from the fragment to the source the fragment is in shadow (from this source). Otherwise, we use the rendered colour. What is this?

What following figure shows normalization transformation. What kind of projection is shown in the figure? (Pay attention to the shape of the object after the normalization.)

Which WebGL function generates "ModelView" matrix?

Which projection has the following advantages and disadvantages?