C Arrays

Question 31

C program is given below:

C

# include <stdio.h>
int main ()
{
        int i, j;
        char a [2] [3] = {{\'a\', \'b\', \'c\'}, {\'d\', \'e\', \'f\'}};
        char b [3] [2];
        char *p = *b;
        for (i = 0; i < 2; i++) {
              for (j = 0; j < 3; j++) {
              *(p + 2*j + i) = a [i] [j];
              }
        }
}
 /* Add code here. Remove these lines if not writing code */ 

What should be the contents of the array b at the end of the program?

• a b
  c d
  e f
• a d
  b e
  c f
• a c
  e b
  d f
• a e
  d c
  b f

Question 32

Consider the array A[]= {6,4,8,1,3} apply the insertion sort to sort the array . Consider the cost associated with each sort is 25 rupees , what is the total cost of the insertion sort when element 1 reaches the first position of the array  ?

• 50
• 25
• 75
• 100

Question 33

A one dimensional array A has indices 1....75. Each element is a string and takes up three memory words. The array is stored at location 1120 decimal. The starting address of A[49] is

• 1267
  

• 1164
  

• 1264
  

• 1169
  

Question 34

Which of the following is true about arrays in C?

• For every type T, there can be an array of T.

• For every type T except void and function type, there can be an array of T.

• When an array is passed to a function, C compiler creates a copy of array.

• 2D arrays are stored in column major form

Question 35

For the following declaration of a function in C, pick the best statement 

C

int [] fun(void (*fptr)(int *));

• It will result in compile error.
  

• No compile error. fun is a function which takes a function pointer fptr as argument and return an array of int.
  

• No compile error. fun is a function which takes a function pointer fptr as argument and returns an array of int. Also, fptr is a function pointer which takes int pointer as argument and returns void.
  

• No compile error. fun is a function which takes a function pointer fptr as argument and returns an array of int. The array of int depends on the body of fun i.e. what size array is returned. Also, fptr is a function pointer which takes int pointer as argument and returns void.
  

Question 36

In C, 1D array of int can be defined as follows and both are correct. 

C

int array1D[4] = {1,2,3,4};
int array1D[] = {1,2,3,4};

But given the following definitions (along-with initialization) of 2D arrays 

C

int array2D[2][4] = {1,2,3,4,5,6,7,8}; /* (i) */
int array2D[][4] = {1,2,3,4,5,6,7,8}; /* (ii) */
int array2D[2][] = {1,2,3,4,5,6,7,8}; /* (iii) */
int array2D[][] = {1,2,3,4,5,6,7,8}; /* (iv) */

Pick the correct statements.

• Only (i) is correct.
  

• Only (i) and (ii) are correct.
  

• Only (i), (ii) and (iii) are correct.
  

• All (i), (ii), (iii) and (iv) are correct.
  

Question 37

The following function computes the maximum value contained in an integer array p[] of size n (n >= 1) 

C

int max(int *p, int n)
{
    int a=0, b=n-1;
    while (__________)
    {
        if (p[a] <= p[b])
        {
            a = a+1;
        }
        else
        {
            b = b-1;
        }
    }
    return p[a];
}

The missing loop condition is

• a != n
  

• b != 0
  

• b > (a + 1)
  

• b != a