C3w2quiz2 - Q4 "In per-tensor quantization weights..."

What does “per-tensor quantization weights” mean ?

The whole question is:

Question 4:
In per-tensor quantization weights are represented by int8 two’s complement values in the range _____________ with zero-point _____________

I can’t find any mention of two’s complement in the lectures, though it is covered here: TensorFlow Lite 8-bit quantization specification
However, am still not sure what per-tensor quantization weights means.

Maybe this image could help you