Types of Exceptions are in oracle

How many types of Exceptions are there 
There are 2 types of exceptions. They are
a) System Exceptions
e.g. When no_data_found, When too_many_rows
b) User Defined Exceptions
e.g. My_exception exception
When My_exception then

What are the inline and the precompiler directives 
The inline and precompiler directives detect the values directly

How do you use the same lov for 2 columns 
We can use the same lov for 2 columns by passing the return values in global values and using the global values in the code

How many minimum groups are required for a matrix report 
The minimum number of groups in matrix report are 4

What is the difference between static and dynamic lov 
The static lov contains the predetermined values while the dynamic lov contains values that come at run time