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1.
If x is greater than 0, what is the time complexity of the following C function:
int recursive(mt x) {
if (x == 1)
return (1);
else
return (recursive(x - 1) + recursive(x - 1));
}
if (x == 1)
return (1);
else
return (recursive(x - 1) + recursive(x - 1));
}
2.
In the following C program, the f function returns ___________________________ for large values of y.
float f(float x, int y) {
float p, s;
int i;
for (s = 1, p = 1, i = 1; i < y; i++) {
p *= x / i;
s += p;
}
return s;
}
float p, s;
int i;
for (s = 1, p = 1, i = 1; i < y; i++) {
p *= x / i;
s += p;
}
return s;
}
3.
In the following C program, CellNode represents a node in a binary tree. When a pointer to the binary tree root is passed as its argument, the value returned by GetValue() is equal to the _____________.
struct CellNode {
struct CellNOde * leftChild;
int element;
struct CellNode * rightChild;
};
int GetValue(struct CellNode * ptr) {
int value = 0;
if (ptr != NULL) {
if ((ptr - > leftChild == NULL) && (ptr - > rightChild == NULL))
value = 1;
else
value = value + GetValue(ptr - > leftChild) + GetValue(ptr - > rightChild);
}
return (value);
}
struct CellNOde * leftChild;
int element;
struct CellNode * rightChild;
};
int GetValue(struct CellNode * ptr) {
int value = 0;
if (ptr != NULL) {
if ((ptr - > leftChild == NULL) && (ptr - > rightChild == NULL))
value = 1;
else
value = value + GetValue(ptr - > leftChild) + GetValue(ptr - > rightChild);
}
return (value);
}
4.
Consider the command ./a.out John loves you. Assume that a.out is an executable. If we execute ./a.out John loves you and try to access the command line arguments as shown in the example C code below, which of the following characters would be printed if we were to print argv[1][2] ?
Example C code to understand the question.
Example C code to understand the question.
#include
int main(int argc, char * argv[]) {
// What would be the value of argv[1][2] ?
printf("%c
", argv[1][2]);
}
int main(int argc, char * argv[]) {
// What would be the value of argv[1][2] ?
printf("%c
", argv[1][2]);
}
5.
What is the return value of f(x, x), if the value of x is initialized to 5 before the call?
int f(int & x, int c) {
c = c - 1;
if (c == 0) return 1;
x = x + 1;
return f(x, c) * x;
}
c = c - 1;
if (c == 0) return 1;
x = x + 1;
return f(x, c) * x;
}
6.
What will be the output of the following C code:
# include
# include
int main() {
union test {
int i;
float f;
char c;
};
union test * t;
t = (union test * ) malloc(sizeof(union test));
t - > f = 10.10 f;
printf("%f", t - > f);
return 0;
}
# include
int main() {
union test {
int i;
float f;
char c;
};
union test * t;
t = (union test * ) malloc(sizeof(union test));
t - > f = 10.10 f;
printf("%f", t - > f);
return 0;
}
7.
If the malloc() function successfully allocates memory, it returns the number of bytes it has allocated.
8.
What is the output of the following C code:
#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
", ptr - p, * ptr - arr, ** ptr);
* ptr++;
printf("%d, %d, %d
", ptr - p, * ptr - arr, ** ptr);
*++ptr;
printf("%d, %d, %d
", ptr - p, * ptr - arr, ** ptr);
++ * ptr;
printf("%d, %d, %d
", ptr - p, * ptr - arr, ** ptr);
return 0;
}
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
", ptr - p, * ptr - arr, ** ptr);
* ptr++;
printf("%d, %d, %d
", ptr - p, * ptr - arr, ** ptr);
*++ptr;
printf("%d, %d, %d
", ptr - p, * ptr - arr, ** ptr);
++ * ptr;
printf("%d, %d, %d
", ptr - p, * ptr - arr, ** ptr);
return 0;
}
9.
If the array begins at 65472 and the size of the integer is 2 bytes, what is the output of the following C code:
#include <stdio.h>
int main()
{
int a[3][4] = {1, 2, 3, 4, 4, 3, 2, 1, 7, 8, 9, 0};
printf("%u, %u
", a + 1, &a + 1);
return 0;
}
int main()
{
int a[3][4] = {1, 2, 3, 4, 4, 3, 2, 1, 7, 8, 9, 0};
printf("%u, %u
", a + 1, &a + 1);
return 0;
}
10.
In C, which of the following statements mentioning the name of the array does not yield the base address:
- If the array name is used with the size of the operator.
- If the array name is an operand of the & operator.
- If the array name is passed to the scanf() function.
- If the array name is passed to the printf() function.