| Other C Code Interview Questions |
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| Question | Asked @ | Answers |
| |
| void main()
{
int *mptr, *cptr;
mptr = (int*)malloc(sizeof(int));
printf(“%d”,*mptr);
int *cptr = (int*)calloc(sizeof(int),1);
printf(“%d”,*cptr);
} | | 1 |
| main()
{
int i=-1;
+i;
printf("i = %d, +i = %d \n",i,+i);
} | | 1 |
| Given n nodes. Find the number of different structural
binary trees that can be formed using the nodes. | Aricent | 7 |
| #include<stdio.h>
main()
{
char s[]={'a','b','c','\n','c','\0'};
char *p,*str,*str1;
p=&s[3];
str=p;
str1=s;
printf("%d",++*p + ++*str1-32);
} | | 1 |
| main( )
{
char *q;
int j;
for (j=0; j<3; j++) scanf(“%s” ,(q+j));
for (j=0; j<3; j++) printf(“%c” ,*(q+j));
for (j=0; j<3; j++) printf(“%s” ,(q+j));
} | | 1 |
| main()
{
int i=5;
printf(“%d”,i=++i ==6);
} | | 1 |
| void main()
{
printf(“sizeof (void *) = %d \n“, sizeof( void *));
printf(“sizeof (int *) = %d \n”, sizeof(int *));
printf(“sizeof (double *) = %d \n”, sizeof(double *));
printf(“sizeof(struct unknown *) = %d \n”, sizeof(struct
unknown *));
} | | 1 |
| struct Foo
{
char *pName;
};
main()
{
struct Foo *obj = malloc(sizeof(struct Foo));
clrscr();
strcpy(obj->pName,"Your Name");
printf("%s", obj->pName);
}
a. Your Name
b. compile error
c. Name
d. Runtime error | HCL | 1 |
| main()
{
int i;
float *pf;
pf = (float *)&i;
*pf = 100.00;
printf("\n %d", i);
}
a. Runtime error.
b. 100
c. Some Integer not 100
d. None of the above | HCL | 1 |
| Finding a number which was log of base 2 | NetApp | 1 |
| main()
{
printf("%d, %d", sizeof('c'), sizeof(100));
}
a. 2, 2
b. 2, 100
c. 4, 100
d. 4, 4 | HCL | 3 |
| What is the hidden bug with the following statement?
assert(val++ != 0); | | 1 |
| Find the largest number in a binary tree | Infosys | 4 |
| main()
{
char *a = "Hello ";
char *b = "World";
clrscr();
printf("%s", strcpy(a,b));
}
a. “Hello”
b. “Hello World”
c. “HelloWorld”
d. None of the above | HCL | 1 |
| void main()
{
int i=5;
printf("%d",i+++++i);
} | | 1 |
| void main()
{
unsigned giveit=-1;
int gotit;
printf("%u ",++giveit);
printf("%u \n",gotit=--giveit);
} | | 1 |
| #include<stdio.h>
main()
{
int a[2][2][2] = { {10,2,3,4}, {5,6,7,8} };
int *p,*q;
p=&a[2][2][2];
*q=***a;
printf("%d..%d",*p,*q);
} | | 1 |
| main()
{
static char
names[5][20]={"pascal","ada","cobol","fortran","perl"};
int i;
char *t;
t=names[3];
names[3]=names[4];
names[4]=t;
for (i=0;i<=4;i++)
printf("%s",names[i]);
} | | 1 |
| main()
{
char *p;
p="%d\n";
p++;
p++;
printf(p-2,300);
} | | 1 |
| Write a prog to accept a given string in any order and flash
error if any of the character is different.
For example : If abc is the input then abc, bca, cba, cab
bac are acceptable, but aac or bcd are unacceptable. | Microsoft | 5 |
| |
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