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. 0
B. Compiler Error
C. 10
D. Garbage value

Correct Option: C
Explanation:

In the following declaration

const int *p;

p can keep address of constant integer.

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
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 a NULL pointer in C?

A. A pointer that points to a non-existent memory location
B. A pointer that has not been initialized
C. A pointer that points to the first memory location in the system
D. A pointer that points to the end of the system memory

Correct Option: A
Explanation:

Answer: A

Explanation: A NULL pointer in C is a pointer that points to a non-existent memory location. It is typically used to indicate that a pointer does not currently point to a valid object.

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
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 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
Explanation: Option B

Q: What is a pointer arithmetic in C?

A. Performing arithmetic operations on the values of pointers
B. Performing arithmetic operations on the memory addresses stored in pointers
C. Converting pointers to integers and performing arithmetic operations on them
D. Converting integers to pointers and performing arithmetic operations on them

Correct Option: B
Explanation:

Answer: B

Explanation: Pointer arithmetic in C involves performing arithmetic operations on the memory addresses stored in pointers. For example, you can add or subtract an integer value from a pointer to move it to a different memory location. However, it is important to be careful with pointer arithmetic to avoid accessing invalid memory locations.

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
Explanation: 2 3 8 9 5

Q: Can we have a pointer to a function?

A. Not possible
B. Possible
C. Depends on the return value
D. Depends on the # of arguments

Correct Option: B
Explanation: Answer:b.Possible

void func(int a)
{
}
void main()
{
void (*fp)(int);
fp=func;
fp(1);
}

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
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: What is a pointer to a function in C?

A. A pointer that points to a specific memory location in a program
B. A pointer that stores the address of a function in memory
C. A pointer that can be used to access the arguments of a function
D. A pointer that can only be used to call functions that return void

Correct Option: B
Explanation:

Answer: B

Explanation: A pointer to a function in C is a pointer that stores the address of a function in memory. You can use this pointer to call the function directly, without having to refer to it by name.

Pointer in C Language - Quiz

What is the output of this program?

What is a double pointer in C?

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

What is a pointer arithmetic in C?

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++; } }

Can we have a pointer to a function?

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

What is a pointer to a function 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 a double pointer in C?

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

What is a pointer arithmetic in C?

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++; } }

Can we have a pointer to a function?

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

What is a pointer to a function in C?

What is the output of this program?

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?
#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++; } }