Pointer in C Language - Quiz

Q: What is the output of this program?


#include<stdio.h>
int main(){
    const int *p;
    int a=10;
    p=&a;
    printf("%d",*p);
    return 0;
}

A. 1
B. Compiler Error
C. 10
D. Garbage value

Correct Option: C
Remarks:

Explanation:

In the following declaration


 const int *p;

p can keep address of constant integer.

Q: What is the output of this C code?

    void main()
    {
        int x = 4;
        int *p = &x;
        int *k = p++;
        int r = p - k;
        printf("%d", r);
    }

A. 4
B. 8
C. 1
D. Run time error

Correct Option: C
Remarks:

Explanation: Option C

Q: What is the output of this C code?

    int main()
    {
        int i = 10;
        int *p = &i;
        printf("%d\n", *p++);
    }

A. Garbage value
B. 10
C. 11
D. Address of i

Correct Option: B
Remarks:

Explanation: Option B

Q: What will be the output of the following program?

void main()
{
int const *p = 5;
Printf("%d", ++(*p));
}

A. 5
B. 6
C. Compiler error
D. Unexpected results

Correct Option: C
Remarks:

Explanation: Compiler error

Q: What will be the output of the following program?

#include"stdio.h"
main()
{
 int a[] = {2, 9, 3.6, 8, 9.7, 5.8};
 int j, *q = a;
 for(j=0; j<5; j++)
 {
 printf("\t%d", *q) ;
 q++;
 }
 
}

A. 2 2 2 2 2
B. 2 3 8 9 5
C. Compile time error
D. Unexpected results

Correct Option: B
Remarks:

Explanation: 2 3 8 9 5

Q: What is the difference between a pointer and a regular variable in C?

A. A pointer can be dereferenced to access its value
B. A regular variable cannot be passed to a function
C. A pointer can only store integer values
D. A regular variable does not require initialization

Correct Option: A
Remarks:

Explanation:

Answer: A

Explanation: A pointer allows you to indirectly access the value of a variable by dereferencing the pointer with the * operator. A regular variable can be accessed directly with its identifier.

Q: Which of the following is the correct way to declare a pointer to an integer variable in C? int *x = &y;

A. <code>int x = &y;</code>
B. <code>int *x = y;</code>
C. <code>int &x = y;</code>
D. <code>int *x = &y;</code>

Correct Option: D
Remarks:

Explanation:

Answer: D

Explanation: The correct way to declare a pointer to an integer variable in C is to use the * operator in the declaration, and assign the address of the variable using the & operator.

Q: What is a double pointer in C?

A. A pointer that can point to two different memory locations
B. A pointer that stores a floating-point value
C. A pointer that points to another pointer
D. A pointer that can store two integer values

Correct Option: C
Remarks:

Explanation:

Answer: C

Explanation: A double pointer in C is a pointer that points to another pointer. It is typically used for dynamic memory allocation, where the first pointer points to a dynamically allocated memory block and the second pointer points to a specific location within that block.

Q: What is the difference between a pointer and a reference in C++?

A. A reference is a type of pointer
B. A pointer can be reassigned to point to a different memory location, while a reference cannot
C. A reference must be initialized when it is declared, while a pointer does not have to be
D. A pointer is a copy of the value it points to, while a reference is an alias for the value it refers to

Correct Option: B
Remarks:

Explanation:

Answer: B

Explanation: In C++, a pointer can be reassigned to point to a different memory location, while a reference always refers to the same object throughout its lifetime. Additionally, a reference must be initialized when it is declared, while a pointer can be declared without initialization.

Q: What is the difference between a const pointer and a pointer to a const in C?

A. A const pointer cannot be dereferenced, while a pointer to a const can
B. A const pointer cannot be reassigned to point to a different memory location, while a pointer to a const can
C. A const pointer points to a const object, while a pointer to a const can point to a non-const object
D. A const pointer and a pointer to a const are equivalent in C

Correct Option: C
Remarks:

Explanation:

Answer: C

Explanation: In C, a const pointer points to a const object, which means that the object it points to cannot be modified through the pointer. On the other hand, a pointer to a const can point to a non-const object, but it cannot be used to modify that object.

Pointer in C Language - Quiz

What is the output of this program?

What is the output of this C code?
void main() { int x = 4; int p = &x; int k = p++; int r = p - k; printf("%d", r); }

What is the output of this C code?
int main() { int i = 10; int p = &i; printf("%d\n", p++); }

What will be the output of the following program?
void main() { int const p = 5; Printf("%d", ++(p)); }

What will be the output of the following program?
#include"stdio.h" main() { int a[] = {2, 9, 3.6, 8, 9.7, 5.8}; int j, q = a; for(j=0; j<5; j++) { printf("\t%d", q) ; q++; } }

What is the difference between a pointer and a regular variable in C?

Which of the following is the correct way to declare a pointer to an integer variable in C? int *x = &y;

What is a double pointer in C?

What is the difference between a pointer and a reference in C++?

What is the difference between a const pointer and a pointer to a const in C?

Pointer in C Language - Quiz

What is the output of this program? #include<stdio.h> int main(){ const int *p; int a=10; p=&a; printf("%d",*p); return 0; }

What is the output of this C code? void main() { int x = 4; int *p = &x; int *k = p++; int r = p - k; printf("%d", r); }

What is the output of this C code? int main() { int i = 10; int *p = &i; printf("%d\n", *p++); }

What will be the output of the following program? void main() { int const *p = 5; Printf("%d", ++(*p)); }

What will be the output of the following program? #include"stdio.h" main() { int a[] = {2, 9, 3.6, 8, 9.7, 5.8}; int j, *q = a; for(j=0; j<5; j++) { printf("\t%d", *q) ; q++; } }

What is the difference between a pointer and a regular variable in C?

Which of the following is the correct way to declare a pointer to an integer variable in C? int *x = &y;

What is a double pointer in C?

What is the difference between a pointer and a reference in C++?

What is the difference between a const pointer and a pointer to a const in C?

What is the output of this program?

What is the output of this C code?
void main() { int x = 4; int p = &x; int k = p++; int r = p - k; printf("%d", r); }

What is the output of this C code?
int main() { int i = 10; int p = &i; printf("%d\n", p++); }

What will be the output of the following program?
void main() { int const p = 5; Printf("%d", ++(p)); }

What will be the output of the following program?
#include"stdio.h" main() { int a[] = {2, 9, 3.6, 8, 9.7, 5.8}; int j, q = a; for(j=0; j<5; j++) { printf("\t%d", q) ; q++; } }