Quick Answer: Can A Structure Contain Pointer To Itself Mcq?

What can’t you do on a void pointer?

Explanation: Because the void pointer is used to cast the variables only, So pointer arithmetic can’t be done in a void pointer..

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. … Some Interesting Facts: 1) void pointers cannot be dereferenced. For example the following program doesn’t compile.

Can a structure contain a pointer to itself?

You cannot declare a structure type that contains itself as a member, but you can declare a structure type that contains a pointer to itself as a member. A structure variable definition contains an optional storage class keyword, the struct keyword, a structure tag, a declarator, and an optional identifier.

Can a structure variable be a pointer?

We can also have pointer to a single structure variable, but it is mostly used when we are dealing with array of structure variables.

What is the structure in C language Mcq?

1) What is a structure in C language.? A) A structure is a collection of elements that can be of same data type.

What is generic pointer?

The void pointer, also known as the generic pointer, is a special type of pointer that can be pointed at objects of any data type! A void pointer is declared like a normal pointer, using the void keyword as the pointer’s type: 1. void *ptr; // ptr is a void pointer.

Which of the following is generic pointer?

A void pointer is typeless pointer also known as generic pointer.

What is pointer to structure?

We have already learned that a pointer is a variable which points to the address of another variable of any data type like int , char , float etc. Similarly, we can have a pointer to structures, where a pointer variable can point to the address of a structure variable.

Can we compare two structures using any built in operator?

Comparing two Structures in Structures and Unions of Programming in C. Comparing structures in c is not permitted to check or compare directly with logical operators. Only structure members can be comparable with logical operator.

How can we check whether the contents of two structure variables are same or not?

How can we check whether the contents of two structure variables are same or not? Ans: There is no way to compare entire structure, we can only compare element by element. if(r.a == s.a);

What is a self referencing pointer?

The self-referencing pointer is used to refer to a current object. It can be used to return an object reference or to identify a passed reference.

What is malloc calloc realloc?

“realloc” or “re-allocation” method in C is used to dynamically change the memory allocation of a previously allocated memory. In other words, if the memory previously allocated with the help of malloc or calloc is insufficient, realloc can be used to dynamically re-allocate memory.

Can we compare two structure variables?

yes,we can compare by using thir addresses. If the 2 structures variable are initialied with calloc or they are set with 0 by memset so you can compare your 2 structures with memcmp. It is possible to use memcmp if: 1) the structs contain no floating-point fields.

How do you compare two structures?

To find out if they are the same object, compare pointers to the two structs for equality. If you want to find out in general if they have the same value you have to do a deep comparison. This involves comparing all the members. If the members are pointers to other structs you need to recurse into those structs too.