Any such figure has only one base; the one that it stands upon.
If you are asking "How many faces does the quadrangular prism have?" then its "ends" are both quadrangular shapes (i.e. rectangles) and there are 4 more rectangles forming the "length" of the prism so the answer is 6
These rectangular shapes are more accurately called "faces"; the edges of the rectangles are called "edges", and the corners are called "vertices".
Your quadrangular prism has 6 faces, 12 edges and 8 vertices.
It has 4 bases.
6
There can be a quadrangular pyramid or a quadrangular prism or other quadrangular shapes. "Quadrangular" is an adjective, not a noun. You need to be more specific.
A quadrangular is an adjective, not a noun. A quadrangular pyramid will have a different number of faces from a quadrangular prism, for example.
8
6
6
It has 5 sides
It has 5 sides
Six faces.
A quadrangular prism is a "box". There are 6 faces, 8 vertices and 12 edges. BTW, this satisfies Euler's Formula of F + V = E + 2.
It depends on what kind of prism you mean. For example, a rectangular prism has 6 bases and a triangular prism has 5 bases. A triangular prism only has two bases.