C Programming -Pointers Vs. Multi-dimensional Arrays

C Programming-Multidimensional Arrays

Question 1

What is the output of this C code?

        #include 
        void main()
        {
        int a[2][3] = {1, 2, 3, 4, 5};
        int i = 0, j = 0;
        for (i = 0; i < 2; i++)
        for (j = 0; j < 3; j++)
        printf("%d", a[i][j]);
        }

A	1 2 3 4 5 0
B	1 2 3 4 5 junk
C	1 2 3 4 5 5
D	Run time error

Question 2

What is the output of this C code?

        #include 
        void main()
        {
        int a[2][3] = {1, 2, 3, , 4, 5};
        int i = 0, j = 0;
        for (i = 0; i < 2; i++)
        for (j = 0; j < 3; j++)
        printf("%d", a[i][j]);
        }

A	1 2 3 junk 4 5
B	Compile time error
C	1 2 3 0 4 5
D	1 2 3 3 4 5

Question 3

What is the output of this C code?

        #include 
        void f(int a[][3])
        {
        a[0][1] = 3;
        int i = 0, j = 0;
        for (i = 0; i < 2; i++)
        for (j = 0; j < 3; j++)
        printf("%d", a[i][j]);
        }
        void main()
        {
        int a[2][3] = {0};
        f(a);
        }

A	0 3 0 0 0 0
B	Junk 3 junk junk junk junk
C	Compile time error
D	All junk values

Question 4

What is the output of this C code?

        #include 
        void f(int a[][])
        {
        a[0][1] = 3;
        int i = 0, j = 0;
        for (i = 0;i < 2; i++)
        for (j = 0;j < 3; j++)
        printf("%d", a[i][j]);
        }
        void main()
        {
        int a[2][3] = {0};
        f(a);
        }

A	0 3 0 0 0 0
B	Junk 3 junk junk junk junk
C	Compile time error
D	All junk values

Question 5

What is the output of this C code?

        #include 
        void f(int a[2][])
        {
        a[0][1] = 3;
        int i = 0, j = 0;
        for (i = 0;i < 2; i++)
        for (j = 0;j < 3; j++)
        printf("%d", a[i][j]);
        }
        void main()
        {
        int a[2][3] = {0};
        f(a);
        }

A	0 3 0 0 0 0
B	Junk 3 junk junk junk junk
C	Compile time error
D	All junk values

Question 6

Comment on the following statement:     int (*a)[7];

A	An array “a” of pointers.
B	A pointer “a” to an array.
C	A ragged array.
D	None of the mentioned

Question 7

 Comment on the 2 arrays regarding P and Q:     int *a1[8];     int *(a3[8]);     P. Array of pointers     Q. Pointer to an array

A	a1 is P, a2 is Q
B	a1 is P, a2 is P
C	a1 is Q, a2 is P
D	a1 is Q, a2 is Q

Question 8

 Which of the following is not possible statically in C?

A	Jagged Array
B	Rectangular Array
C	Cuboidal Array
D	Multidimensional Array

Question 9

What is the correct syntax to send a 3-dimensional array as a parameter?    (Assuming declaration int a[5][4][3];)

A	func(a);
B	func(&a);
C	func(*a);
D	func(**a);

Question 10

Applications of multidimensional array are?

A	Matrix-Multiplication
B	Minimum Spanning Tree
C	Finding connectivity between nodes
D	All of the mentioned

Question 11

What is the output of this C code?

    #include 
    int main()
    {
    int ary[2][3];
    foo(ary);
    }
    void foo(int *ary[])
    {
    int i = 10, j = 2, k;
    ary[0] = &i;
    ary[1] = &j;
   *ary[0] = 2;
    for (k = 0;k < 2; k++)
    printf("%d\n", *ary[k]);
    }

A	2 2
B	Compile time error
C	Undefined behaviour
D	10 2

Question 12

What is the output of this C code?

    #include 
    int main()
    {
    int ary[2][3];
    foo(ary);
    }
    void foo(int (*ary)[3])
    {
    int i = 10, j = 2, k;
    ary[0] = &i;
    ary[1] = &j;
    for (k = 0;k < 2; k++)
    printf("%d\n", *ary[k]);
    }

A	Compile time error
B	10 2
C	Undefined behaviour
D	segmentation fault/code crash

Question 13

What is the output of this C code?

    #include 
    int main()
    {
    foo(ary);
    }
    void foo(int **ary)
    {
    int i = 10, k = 10, j = 2;
    int *ary[2];
    ary[0] = &i;
    ary[1] = &j;
    printf("%d\n", ary[0][1]);
    }

A	10
B	2
C	Compile time error
D	Undefined behaviour

Question 14

What is the output of this C code?

    #include 
    int main()
    {
    int ary[2][3][4], j = 20;
    ary[0][0] = &j;
    printf("%d\n", *ary[0][0]);
    }

A	Compile time error
B	20
C	Address of j
D	Undefined behaviour

Question 15

What is the output of this C code?

    #include 
    int main()
    {
    int ary[2][3];
    ary[][] = {{1, 2, 3}, {4, 5, 6}};
    printf("%d\n", ary[1][0]);
    }

A	Compile time error
B	4
C	1
D	2

Check Your Answers:

  1. A

  2. B

  3. A

  4. C

  5. C

  6. B

  7. B

  8. A

  9. A

10. D

11. A

12. A

13. D

14. A

15. A

 

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