46) Define Object-oriented model.
Compilations of objects make up this model in which values are stored within instance variables
which is inside the object. The object itself comprises bodies of object
for its operation which are
called methods. Objects containing same kind of variables and methods are called classes.
47) Define Entity.
It can be defined as being a ‘thing’ with an independent existence in the real world.
48) What do you mean by Entity type?
A set of entries having similar attributes are entity types.
49) Define Entity Set.
Compilation of all entries of any particular type of entry in the database is called Entity Set.
50) What do you mean by Entity type extension?
Compilation of similar entity types into one particular type which is grouped
together as an entity
set.
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