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

C Interview Questions

Questions Answers Views Company eMail

write a program to display the numbers in the following 4 4 3 3 2 2 1 1 0 1 1 2 2 3 3 4 4

1 3524

write a program to display the numbers in the following format 4 4 3 3 3 3 2 2 2 2 2 2 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 2 2 2 2 2 3 3 3 4

IBM, NIIT, Winit,

9 14582

what is the output of the program and explain why?? #include void main ( ) { int k=4,j=0: switch (k) { case 3; j=300; case 4: j=400: case 5: j=500; } printf (“%d\n”,j); }

Oracle,

14 17647

What is the real time usage volatile?

Polycom,

2 6145

what are the stoge class in C and tel the scope and life time of it?

Tech Mahindra,

2 5668

What will be the result of the following program? char*g() { static char x[1024]; return x; } main() { char*g1="First String"; strcpy(g(),g1); g1=g(); strcpy(g1,"Second String"); printf("Answer is:%s", g()); } (A) Answer is: First String (B) Answer is: Second String (C) Run time Error/Core Dump (D) None of these

Oracle,

2 8127

. Consider the following program main() { int a[5]={1,3,6,7,0}; int *b; b=&a[2]; } The value of b[-1] is (A) 1 (B) 3 (C) -6 (D) none

Oracle,

9 22324

Given a piece of code int x[10]; int *ab; ab=x; To access the 6th element of the array which of the following is incorrect? (A) *(x+5) (B) x[5] (C) ab[5] (D) *(*ab+5} .

Oracle,

2 9127

What is the output of the following progarm? #include main( ) { int x,y=10; x=4; y=fact(x); printf(“%d\n”,y); } unsigned int fact(int x) { return(x*fact(x-1)); } A. 24 B. 10 C. 4 D. none

2 6011

What is the o/p of the follow pgm? #include main() { char char_arr[5]=”ORACL”; char c=’E’; prinf(“%s\n”,strcat(char_arr,c)); } a:oracle b. oracl c.e d.none

Oracle,

2 5304

#include main() { int a[3]; int *I; a[0]=100;a[1]=200;a[2]=300; I=a; Printf(“%d\n”, ++*I); Printf(“%d\n”, *++I); Printf(“%d\n”, (*I)--); Printf(“%d\n”, *I); } what is the o/p a. 101,200,200,199 b. 200,201,201,100 c. 101,200,199,199 d. 200,300,200,100

1 4885

What is 'makefile' in C langauage? How it be useful? How to write a makefile to a particular program?

2 8139

Is main() is used in the program,,see below example? void main() { int i; for(i=0;i<10;i++) main(); } Then what is the output of the program?

6 7176

What is the output for the below program? void main() { float me=1.1; double you=1.1; if(me==you) printf("love c"); else printf("know c"); }

7 10175

What is the output of the below program and how it is? void main() { static int var=5; printf("%d",var--); if(var) main(); }

MindFire, TCS, Tech Mahindra,

8 19519

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Un-Answered Questions { C }

What is the difference between array and pointer in c?

1103

What is enumerated data type in c?

1043

Explain what is the best way to comment out a section of code that contains comments?

1105

Can true be a variable name in c?

1004

What does *p++ do?

983

Explain what is wrong with this program statement? Void = 10;

1207

What is a ternary operator in c?

1068

Write a program to swap two numbers without using third variable?

1259

Why dont c comments nest?

1008

What happens if header file is included twice?

1102

What is data structure in c and its types?

1036

What is indirection?

1043

What does sizeof function do?

1139

What do you know about the use of bit field?

1006

How will you find a duplicate number in a array without negating the nos ?

2101

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