Qualcomm Array Quiz-1

Question 1

Time: 00:00:00

What will be the output of the program?

#include

int main()
{
void fun(int, int[]);
int arr[] = {1, 2, 3, 4};
int i;
fun(4, arr);
for(i=0; i<4; i++)
printf("%d,", arr[i]);
return 0;
}
void fun(int n, int arr[])
{
int *p=0;
int i=0;
while(i++ < n)
p = &arr[i];
*p=0;
}

2, 3, 4, 5

1, 2, 3, 4

0, 1, 2, 3

3, 2, 1 0

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 2

Time: 00:00:00

What will be the output of the program?

#include
void fun(int **p);

int main()
{
int a[3][4] = {1, 2, 3, 4, 4, 3, 2, 8, 7, 8, 9, 0};
int *ptr;
ptr = &a[0][0];
fun(&ptr);
return 0;
}
void fun(int **p)
{
printf("%d\n", **p);
}

1

2

3

4

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 3

Time: 00:00:00

What will be the output of the program?

#include

int main()
{
static int arr[] = {0, 1, 2, 3, 4};
int *p[] = {arr, arr+1, arr+2, arr+3, arr+4};
int **ptr=p;
ptr++;
printf("%d, %d, %d\n", ptr-p, *ptr-arr, **ptr);
*ptr++;
printf("%d, %d, %d\n", ptr-p, *ptr-arr, **ptr);
*++ptr;
printf("%d, %d, %d\n", ptr-p, *ptr-arr, **ptr);
++*ptr;
printf("%d, %d, %d\n", ptr-p, *ptr-arr, **ptr);
return 0;
}

0, 0, 0 1, 1, 1 2, 2, 2 3, 3, 3

1, 1, 2 2, 2, 3 3, 3, 4 4, 4, 1

1, 1, 1 2, 2, 2 3, 3, 3 3, 4, 4

0, 1, 2 1, 2, 3 2, 3, 4 3, 4, 5

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 4

Time: 00:00:00

What will be the output of the program?

#include

int main()
{
float arr[] = {12.4, 2.3, 4.5, 6.7};
printf("%d\n", sizeof(arr)/sizeof(arr[0]));
return 0;
}

5

4

6

7

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 5

Time: 00:00:00

Which of the following statements are correct about the program below?

#include

int main()
{
int size, i;
scanf("%d", &size);
int arr[size];
for(i=1; i<=size; i++)
{
scanf("%d", arr[i]);
printf("%d", arr[i]);
}
return 0;
}

The code is erroneous since the subscript for an array used in for loop is in the range 1 to size.

The code is erroneous since the values of the array are getting scanned through the loop.

The code is erroneous since the statement declaring the array is invalid.

The code is correct and runs successfully

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 6

Time: 00:00:00

Which of the following statements are correct about an array?

1: The array int num[26]; can store 26 elements.
2: The expression num[1] designates the very first element in the array.
3: It is necessary to initialize the array at the time of declaration.
4: The declaration num[SIZE] is allowed if SIZE is a macro.

1

1,4

2,3

2,4

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 7

Time: 00:00:00

Are the expressions arr and &arr same for an array of 10 integers?

yes

no

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 8

Time: 00:00:00

myarr[5] is equivalent of?

&(myarr + 5)

*(myarr + 5)

(*myarr + 5)

None of the above

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 9

Time: 00:00:00

Find the maximum sub-array sum for the following array:
{3, 6, 7, 9, 3, 8}

33

36

23

26

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 10

Time: 00:00:00

What is the value stored in sum[4] after the following program is executed?

#include
int max_num(int a,int b)
{
if(a> b)
return a;
return b;
}
int maximum_subarray_sum(int *arr, int len)
{
int sum[len], idx;
sum[0] = arr[0];
for(idx = 1; idx < len; idx++)
sum[idx] = max_num(sum[idx - 1] + arr[idx], arr[idx]);
int mx = sum[0];
for(idx = 0; idx < len; idx++)
if(sum[idx] > mx)
mx =sum[idx];
return mx;
}
int main()
{
int arr[] = {-2, 14, 11, -13, 10, -5, 11, -6, 3, -5},len = 10;
int ans = maximum_subarray_sum(arr, len);
printf("%d",ans);
return 0;
}

28

25

22

12

Good Job!

Oops!