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Related Interview Questions

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  There are times when it’s necessary to have a pointer that doesn’t point to anything. The macro NULL, defined in , has a value that’s guaranteed to be dif...

• What is a void pointer?  01.10.08

  a pointer with no return type is called a null pointer.It may be any kind of datatype.It takes the data type according to the requirement in the program. for...

• In C, why is the void pointer useful? When would you use it?  18.07.06

  The void pointer is useful becuase it is a generic pointer that any pointer can be cast into and back again without loss of information....

• If you are using C language to implement the heterogeneous linked list, what pointer type will you use?  24.06.06

  The heterogeneous linked list contains different data types in its nodes and we need a link, pointer to connect them. It is not possible to use ordinary pointer...

• Can math operations be performed on a void pointer?  22.03.06

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• What is the difference between NULL and NUL?  22.03.06

  NULL is a macro defined in for the null pointer. NUL is the name of the first character in the ASCII character set. It corresponds to a zero value. Thereâ...

• How do you print an address?  22.03.06

  The safest way is to use printf() (or fprintf() or sprintf()) with the %P specification. That prints a void pointer (void*). Different compilers might print a...

• What is a null pointer?  22.03.06

  There are times when it’s necessary to have a pointer that doesn’t point to anything. The macro NULL, defined in , has a value that’s guaranteed to be d...

• What’s the difference between a null pointer, a NULL macro, the ASCII NUL character and a null string?  12.03.06

  A null pointer is a pointer which doesn't point anywhere. A NULL macro is used to represent the null pointer in source code. It has a value 0 associated with it...

• If you are using C language to implement the heterogeneous linked list, what pointer type will you use?  09.03.06

  The heterogeneous linked list contains different data types in its nodes and we need a link, pointer to connect them. It is not possible to use ordinary pointer...