Drawbacks of contiguous allocation of disk space

Question

Specify some of the drawbacks of contiguous allocation of the disk space?

Answer 1

The drawbacks can be listed as:

a) It suffers from the external fragmentation.
b) It suffers from the internal fragmentation.
c) There exists difficulty in finding the space for new file.
d) File cannot be extended.
e) Size of file is to be declared in advance.