Questions and answers for exam Preparation

MCQs

Total Questions : 33 | Page 2 of 4 pages

Question 11. What will be the output of the following code?
void main()
{
int a[10];
printf("%d %d", a[-1], a[12]);
}

0 0
Garbage value 0
0 Garbage Value
Garbage vlaue Garbage Value
Code will not compile

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Answer: Option D. -> Garbage vlaue Garbage Value

Question 12. What does the following declaration mean?
int (*ptr)[10];

ptr is array of pointers to 10 integers
ptr is a pointer to an array of 10 integers
ptr is an array of 10 integers
ptr is an pointer to array

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Answer: Option B. -> ptr is a pointer to an array of 10 integers

Question 13. Array passed as an argument to a function is interpreted as

Address of the array.
Values of the first elements of the array.
Address of the first element of the array.
Number of element of the array.

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Answer: Option C. -> Address of the first element of the array.

Question 14. What will be the output of the program if the array begins at 65472 and each integer occupies 2 bytes?
#include
void main()
{
int a[3][4] = {1, 2, 3, 4, 4, 3, 2, 1, 7, 8, 9, 0};
printf("%u, %u", a+1, &a+1);
}

65474, 65488
65480, 65488
65480, 65496
65474, 65476
None of these

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Answer: Option C. -> 65480, 65496

Question 15. What will be the output of the program ?
#include
int main()
{
int arr[1] = {10};
printf("%d", 0[arr]);
return 0;
}

1
0
10
6
None of these

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Answer: Option C. -> 10

Question 16. What will be the output of the program if the array begins at address 65486?
#include
void main()
{
int arr[] = {12, 14, 15, 23, 45};
printf("%u, %u", arr, &arr);
}

65486, 65488
65486, 65490
65486, 65487
65486, 65486
None of these

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Answer: Option D. -> 65486, 65486

Question 17. What will be the output of the program ?
#include
void main()
{
float arr[] = {12.4, 2.3, 4.5, 6.7};
printf("%d", sizeof(arr)/sizeof(arr[0]));
}

5
4
6
7
None of these

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Answer: Option B. -> 4

Question 18. Which of the following statements are correct about the program below?
#include
void main()
{
int size, i;
scanf("%d", &size);
int arr[size];
for(i=1; i

The code is erroneous since the statement declaring array is invalid.
The code is erroneous since the subscript for array used in for loop is in the range 1 to size.
The code is correct and runs successfully.
The code is erroneous since the values of array are getting scanned through the loop.
None of these

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Answer: Option A. -> The code is erroneous since the statement declaring array is invalid.

Question 19. Which of the following is correct way to define the function fun() in the below program?
#include
void main()
{
int a[3][4];
fun(a);
}

void fun(int p[][4]){}
void fun(int *p[4]){}
void fun(int *p[][4]){}
void fun(int *p[3][4]){}
None of these

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Answer: Option A. -> void fun(int p[][4]){}

Question 20. 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.