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71.	What is storage class? What are the different storage classes in C?
	Storage class is an attribute that changes the behavior of a variable. It controls the lifetime,scope and linkage. The storage classes in c are auto, register, and extern, static, typedef.
	Discuss Sravani, says Feb 14, 2014 Te storage classes are as follows automatic(auto):this type of storage class will be stored in RAM(in stack ) , its lifetime end and starts with process and it has no linkage since it not accessible to other function. Register :register storage class behaviour is same auto but only difference is it is copied in registers in cpu for optimization. static:static storage class memory is in data section in hard disk and its space is only for function and accessible only for a function extern: extern is global accessible ,its storage is in data section in hard disk and it start and end with process. Saurabh, said Feb 03, 2014 There are following types of storage classes in c Auotmatic : Whose storage is in RAM and the keyword used for this class is auto. Register : Whose storage is in Register and the keyword used for this class is register. Extern /Global : Whose storage is in RAM and the keyword used for this class is extern. Static : Whose storage is in RAM and the keyword used for this class is static. janardhan, said Jan 07,2014 Void pointer is a generic pointer.by using this pointer we can access any type of data with type casting. Your Name Your Email-ID Your Answer

72.	What the advantages of using Unions?
	When the C compiler is allocating memory for unions it will always reserve enough room for the largest member.
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73.	What is the difference between Strings and Arrays?
	String is a sequence of characters ending with NULL .it can be treated as a one dimensional array of characters terminated by a NULL character.
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74.	What is a huge pointer?
	Huge pointer is 32bit long containing segment address and offset address. Huge pointers are normalized pointers so for any given memory address there is only one possible huge address segment : offset pair. Huge pointer arithmetic is doe with calls to special subroutines so its arithmetic slower than any other pointers.
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75.	In C, why is the void pointer useful? When would you use it?
	The void pointer is useful because it is a generic pointer that any pointer can be cast into and back again without loss of information.
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