Answer:
For undirected graph n(n-1) for directed graph 
Explanation:
The maximum number of edges for a undirected graph is given by 
, where n is number of vertices
The maximum number of edges in directed graph is given by , where n is number of vertices
The maximum number of edges is greater in undirected graph than directed graph
Answer:
Many-to-one
Explanation:
Many-to-one relationships is possible when two tables share the same primary key it is because one entity contains values that refer to another entity that has unique values. It often enforced by primary key relationships, and the relationships typically are between fact and dimension tables and between levels in a hierarchy.
Answer:
B
Explanation:
Data that is stored in an online server can be described as being <u>in the cloud</u>. This may also be a reason why you might have heard about "cloud computing" or saving files "in the cloud."
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Other Choices:
A - Read-only Memory (ROM) is a type of non-volatile memory (memory stays even after power is removed) and is useful in storing rarely-used software on the computer.
C - Random Access Memory (RAM) is a type of volatile memory that is used to retain active data and machine code.
D - A flash drive is a type of device that can electrically store, erase, and reprogram data by using flash memory. A USB drive (or "stick") is a common medium.
