The unique identifier (UIDs) for a set of hierarchical entities can be propagated by using multiple <u>barred</u> relationship.
<h3>What is a UID?</h3>
UID is anacronym for unique identifier and it can be defined as an alphanumeric or numeric string that is associated with a single entity or unique among all identifiers within an information system (IS).
This ultimately implies that, unique identifier (UIDs) are identifiers that marks a particular record within an information system (IS) as unique from every other record.
In Computer science, the unique identifier (UIDs) for a set of hierarchical entities can be propagated by using multiple <u>barred</u> relationship because they represent the relationships between the originating entities and the intersection entity.
Read more on a unique identifier here: brainly.com/question/25619349
Answer:
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Answer:
Using Python language :
a = eval ( input ( "Enter a mark please"))
if ( a <0){
print ("Invalid mark")};
else if (a >=90 && a <=100){ print
( "GREAT")};
Explanation:
