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,

1751

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,

1184

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

Wilco,

1070

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,

1142

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

Wilco,

1158

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

Wilco,

1556

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

Wilco,

1197

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,

1438

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

Wilco,

1637

Differentiate between null and void pointers.

TCS,

1166

Explain the difference between null pointer and void pointer.

TCS,

1087

Explain the Difference between the New and Malloc keyword.

InterGraph,

1136

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

1149

find the sum of two matrices and WAP for it.

Huawei,

1140

Write a program with dynamically allocation of variable.

Atos Origin,

1133

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Un-Answered Questions { C }

What is chain pointer in c?

1060

What is the purpose of 'register' keyword?

1100

How do you write a program which produces its own source code as output?

1121

Explain what are the standard predefined macros?

1119

How can I recover the file name given an open stream or file descriptor?

1082

What is #line?

1057

Explain how do you determine the length of a string value that was stored in a variable?

1155

What is the meaning of && in c?

1019

Is it possible to use curly brackets ({}) to enclose single line code in c program?

1320

Why do we use main function?

1181

What is structure padding and packing in c?

1069

What are linker error?

1095

What does it mean when the linker says that _end is undefined?

1099

Explain b+ tree?

1068

What is pointers in c?

1116

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