What is the difference between null pointer and void pointer Mcq?

– A pointer is initialized as NULL if we are not aware of its value at the time of declaration. -Whereas, Void pointers are general-purpose pointers which do not have any type associated with them and can contain the address of any type of variable.

What is the difference between null and void?

The difference between null and void as term for nothing stems from their place in physical space. A void is nothing but takes up space; null is nothing at all. In other words, you could measure a void but null offers nothing to measure. 4.1 Void is used to indicate that a function/method does not return any data type.

What is the difference between null pointer and wild pointer?

2 Answers. Pointer terminology: Dangling (or wild) pointer: a pointer that points somewhere, but not to a valid object. Null pointer: a pointer that points to a specially designated out-of-bounds location that programs will never legally store data in.

What is a void pointer?

A void pointer is a pointer that has no associated data type with it. A void pointer can hold address of any type and can be typcasted to any type.

WHAT IS null pointer in CPP?

A pointer that is assigned NULL is called a null pointer. However, the memory address 0 has special significance; it signals that the pointer is not intended to point to an accessible memory location. But by convention, if a pointer contains the null (zero) value, it is assumed to point to nothing.

What is the difference between null pointer and generic pointer?

Null pointer is specially reserved value of a pointer. Void pointer is a specific pointer type. Null pointer is used for assigning 0 to a pointer variable of any type. Void pointer is used for storing address of other variable irrespective of its datatype.

WHAT IS NULL pointer with example?

In case with the pointers – if any pointer does not contain a valid memory address or any pointer is uninitialized, known as “NULL pointer”. We can also assign 0 (or NULL) to make a pointer as “NULL pointer”. Example: In this example, there are 3 integer pointers ptr1, ptr2 and ptr3.

What is the difference between void and null pointers .give suitable examples in support of your answer?

A null pointer points has the value NULL which is typically 0, but in any case a memory location which is invalid to dereference. A void pointer points at data of type void. The word “void” is not an indication that the data referenced by the pointer is invalid or that the pointer has been nullified.

What is difference between uninitialized pointer and null pointer?

NULL vs Uninitialized pointer – An uninitialized pointer stores an undefined value. A null pointer stores a defined value, but one that is defined by the environment to not be a valid address for any member or object.

WHAT IS null pointer with example?

What is void pointer and null pointer explain with an example?

What is the difference between voidvoid and null pointer in C?

void is absence of type. I.E. a function returning a void type is a function that returns nothing. void pointer: is a pointer to a memory location whose type can be anything: a structure, an int, a float, you name it. A NULL pointer is a pointer to location 0x00, that is, no location. Pointing to nothing.

What is the return type of a pointer to void?

“Pointer to void” is a type (not a “return type”). Values of any type can be returned by functions, and thus be (the function’s) return type. A null pointer is a pointer that, regardless of its type, is pointing at the null object, which is not any valid object that can be created. A null pointer can be said to point at “nothing”.

What is the difference between null pointer and null pointer?

While null pointer is the pointer with having NULL value as address, the pointer is assigned NULL value so that it cannot be used to access others data which its address may contain while creation. I think it is good programming technique to assign a pointer NULL if its not used at the moment.

What is a void *PTR in C++?

A void *ptr is the pointer which can be used to point any type of data. It maybe int, float, double. It has no return type that is initially pointer is created with pointer type (having hex value) and we can assign this pointer to any type of data.