INTERVIEW QUESTIONS MICROSOFT VISUAL BASIC DETAILS

Question: What is option base? diff between option base
and option explicit?

Answer: Option Base -

When an array is declared by default starting index number is 0. By using this statement the programmer can change the starting index number. Well but according to coding conventions this concept should not be used.

Option Explicit -

Declaring a variable in Visual Basic by default is not must. Due to this by default every variable are considered as Variant hence unnecessart memory wastage. Well good practice is to declare variable of the type you want to use. Incase if you are not ware of the type u want to declare its better u declare explicity as variant. Well for this statment Option Explicit is used. this is set in top of General Declaration of Form Module. Once declared every variable type must be defined.

Option Base -

When an array is declared by default starting index number is 0. By using this statement the programmer can change the starting index number. Well but according to coding conventions this concept should not be used.

Option Explicit -

Declaring a variable in Visual Basic by default is not must. Due to this by default every variable are considered as Variant hence unnecessart memory wastage. Well good practice is to declare variable of the type you want to use. Incase if you are not ware of the type u want to declare its better u declare explicity as variant. Well for this statment Option Explicit is used. this is set in top of General Declaration of Form Module. Once declared every variable type must be defined.
Source: CoolInterview.com

option base is used in case of arrays ;to change starting index of array either to 0 or 1 only;
eg
in general declarations do as:
option base 1
or
option base 0
Source: CoolInterview.com

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