C-Programming |Gate-2018| Previous Year Questions| Set-2

Set-15 C-Programming Gate 2005

C-Programming |Gate-2018|

1. Consider the following C program:

#include <stdio.h>
int counter = 0;
int calc (int a, int b)

{
int c;
counter++;
if (b==3) return (a*a*a) ;
else  {
c = calc (a, b/3) ;
return (c*c*c) ;
}}
int main ()  {
calc (4, 81);
printf (“%d”, counter) ;
}

The output of this program is ______. [GATE – 2018]

a. 4
b. 5
c. 6
d. 7

Answer : a)


2. Consider the following C program.

#include <stdio.h>
struct Outnode {
char x, y, z ;
};
int main () {
struct Ournode p = {‘1’, ‘0’, ‘a’+2} ;
struct Ournode *q = &p ;
printf (“%c, %c”, *((char*)q+1), *((char*)q+2)) ;
return 0 ;
}

The output of this program is : [GATE – 2018]

a. ‘0’, ‘a+2’
b. 0, a+2
c. 0, c
d. ‘0’, ‘c’

Answer : c)
C-Programming |Gate-2018|


3. Consider the following C program:

#include<stdio.h>
void fun1(char *s1, char *s2)  {
char *tmp; 
tmp = s1;
s1 = s2;
s2 = tmp;
}
void fun2(char **s2, char **s2)  {
char *tmp;
tmp = *s1;
*s1 = *s2;
*s2 = tmp;
}
int main ()  {
char *str1 = “Hi”, *str2 = “Bye”;
fun1(str1, str2);     printf(“%s %s”, str1, str2);
fun2(&str1, &str2);   printf(“%s %s”, str1, str2);
return 0;
}

The output of the program above is : [GATE – 2018]

a. Hi Bye Hi Bye
b. Bye Hi Bye Hi
c. Bye Hi Hi Bye
d. Hi Bye Bye Hi

Answer : d)


4. Consider the following C code. Assume that unsigned long int type length is 64 bits.

unsigned long int fun(unsigned long int n)  {
unsigned long int i, j, j=0, sum = 0;
for (i = n; i > 1; i = i/2) j++;
for ( ; j > 1; j = j/2) sum++;
return sum;
}

The value returned when we call fun with the input 240 is : [GATE – 2018]

a. 4
b. 5
c. 6
d. 40

Answer : b)
C-Programming |Gate-2018|


5. Consider the following program written in pseudo-code. Assume that x and y are integers.

Count (x, y)  {
if (y != 1)  {
if (x != 1)  {
print(“*”) ;
Count (x/2, y) ;
}
else  {
y = y – 1 ;
Count (1024, y) ;
}
}}

The number of times that the print statement is executed by the call Count(1024, 1024) is ______. [GATE – 2018]

a. 10230
b. 10231
c. 10232
d. 10233

Answer : a)


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