C Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

C Interview Questions

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FILE *fp1,*fp2; fp1=fopen("one","w") fp2=fopen("one","w") fputc('A',fp1) fputc('B',fp2) fclose(fp1) fclose(fp2)} a.error b. c. d.

Wilco,

1808

What are the output(s) for the following ? #include char *f() {char *s=malloc(8); strcpy(s,"goodbye")} main() { char *f(); printf("%c",*f()='A'); }

Wilco,

1222

What does. int *x[](); means ?

Wilco,

1132

a=10;b= 5;c=3;d=3; if(a printf(%d %d %d %d a,b,c,d) else printf("%d %d %d %d a,b,c,d);

Wilco,

1191

main() { int i = 10; printf(" %d %d %d ", ++i, i++, ++i); }

Wilco,

1202

main() { inta=10,b=20; a>=5?b=100:b=200; printf("%d ",b); }

Wilco,

1642

main() { printf("hello"); fork(); }

Wilco,

1247

main() { struct s1 { char *str; struct s1 *ptr; }; static struct s1 arr[] = { {"Hyderabad",arr+1}, {"Bangalore",arr+2}, {"Delhi",arr} }; struct s1 *p[3]; int i; < BR> for(i=0;i<=2;i++) p[i] = arr[i].ptr; printf("%s ",(*p)->str); printf("%s ",(++*p)->str); printf("%s ",((*p)++)->str); }

Wilco,

1506

typedef struct{ char *; nodeptr next; } * nodeptr ; What does nodeptr stand for?

Wilco,

1684

Differentiate between null and void pointers.

TCS,

1226

Explain the difference between null pointer and void pointer.

TCS,

1129

Explain the Difference between the New and Malloc keyword.

InterGraph,

1185

The statement, int(*x[]) () what does in indicate?

1201

find the sum of two matrices and WAP for it.

Huawei,

1194

Write a program with dynamically allocation of variable.

Atos Origin,

1179

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Un-Answered Questions { C }

What is function prototype in c with example?

1159

What is a pointer in c?

1688

What is #error and use of it?

1344

Is c pass by value or reference?

1099

What are the functions to open and close the file in c language?

1083

What is break in c?

1098

What is the right type to use for boolean values in c? Is there a standard type?

1056

Device an algorithm for weiler-atherton polygon clipping, where the clipping window can be any specified polygon

6018

What is the 'named constructor idiom'?

1144

What is the best way of making my program efficient?

1080

#include main() { enum _tag{ left=10, right, front=100, back}; printf("left is %d, right is %d, front is %d, back is %d",left,right,front,back); }

1160

What are the standard predefined macros?

1202

How do we print only part of a string in c?

1078

What is wrong in this statement?

1213

What is local and global variable in c?

1248

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