Skip to main content

C Interview Questions And Answers - Part 4.

What is the output of following c program?
#include<stdio.h>
int main() {

int goto=5;
printf("%d",goto);
return 0;
}

Output: Compilation error. 
Because it declared an invalid variable name. goto is a keyword in c language and variable name cannot be any keyword.

What is the output of following c program?
#include<stdio.h>
int main() {

long int 1a=5l;
printf("%ld",1a);
return 0;
}

Output: Compilation error.
Because variable name cannot start with numeric value.

What is the output of following c program?
#include<stdio.h>
int main() {

int max-val=100;
int min-val=10;
int avg-val;
avg-val = max-val + min-val / 2;

printf("%d",avg-val);
return 0;
}

Output: Compilation error.
Because variable name cannot have special character except underscore ( _ ).

What is the output of following c program?
#include<stdio.h>
int xyz=10;
int main() {

int xyz=20;
printf("%d",xyz);
return 0;
}

Output: 20
Because two variables can have same name in different scope.

What is the output of following c program?
#include<stdio.h>
int main() {

int ABC=10;
printf("%d",abc);
return 0;
}

Output: Compilation error.
Because variable name is case sensitive.

What is the output of following c program?
#include<stdio.h>
int main() {

int xyz=20;
int xyz;
printf("%d",xyz);
return 0;
}

Output: Compilation error.
Because two local variables cannot have same name in same scope.

What is the output of following c program?
#include<stdio.h>
void main() {

char *str="CQUESTIONBANK";
printf(str+9);
getch();
}
Output: BANK

What is the output of following c program?
#include<stdio.h>
extern struct student {

int a;
int b;
int c;
int d;
}s={6,7,8,9};

void main() {
printf("%d %d %d %d",s.a,s.b,s.c,s.d);
getch();
}
Output: 6 7 8 9

What is the output of following c program?
#include<stdio.h>

struct student {
int roll;
int cgpa;
int sgpa[8];
};

void main() {
struct student s={12,8,7,2,5,9};
int *ptr;

ptr=(int *)&s;
printf("%d",*(ptr+3));
getch();
}
Output: 2

What is the output of following c program?
#include<stdio.h>

struct game {
int level;
int score;

struct player {
char *name;
}g2;
}g1;

void main() {
printf("%d  %d  %s",g1.level,g1.score,g1.g2.name);
getch();
}
Output: 0 0 (null)
Labels:

Popular posts from this blog

C Program To Check Whether A Number Is Palindrome Or Not.

This program takes an integer from user and the integer is reversed. If the reversed integer is equal to the integer entered by user then that number is a palindrome. If not that number is not a palindrome.   #include <stdio.h> int main()  { int num, temp, remainder, reverse = 0; printf("Enter an integer: "); scanf("%d", &num); /*  original number is stored at temp */ temp = num; while (num > 0)  { remainder = num % 10; reverse = reverse * 10 + remainder; num /= 10;   }
Read more

C++ Program To Implement Casino Number Guessing Game.

#include <iostream> #include <string> #include <cstdlib> #include <ctime> using namespace std; void drawLine(int n, char symbol); void rules(); int main() { string playerName; int amount; int bettingAmount; int guess; int dice; char choice; srand(time(0)); drawLine(70,'_'); cout << "\n\n\n\t\tCASINO GAME\n\n\n\n"; drawLine(70,'_'); cout << "\n\nEnter Your Name : "; getline(cin, playerName); cout << "\n\nEnter Deposit Amount To Play Game : $"; cin >> amount;
Read more

C Program To Convert Natural Numbers To Roman Numerals.

Roman Number System of representing numbers devised by the ancient Romans. The numbers are formed by combinations of the symbols I, V, X, L, C, D, and M, standing, respectively, for 1, 5, 10, 50, 100, 500, and 1,000 in the Hindu-Arabic numeral system. Natural numbers mean no negative numbers and no fractions, i.e. the whole numbers from 1 upwards: 1, 2, 3, and so on. Here is source code of the C program to convert natural numbers to Roman Numerals. It compiles and runs on any operating system. #include <stdio.h> void predigit(char num1, char num2); void postdigit(char c, int n); char romanval[1000]; int i = 0; int main() { int j; long number; printf("Enter any natural number: "); scanf("%d", &number);
Read more

Introduction To Algorithms, 3rd Edition

Before there were computers, there were algorithms. But now that there are computers, there are even more algorithms, and algorithms lie at the heart of computing. This book provides a comprehensive introduction to the modern study of computer algorithms. It presents many algorithms and covers them in considerable depth, yet makes their design and analysis accessible to all levels of readers. In this book, the authors tried to keep explanations elementary without sacrificing depth of coverage or mathematical rigor. Each chapter presents an algorithm, a design technique, an application area, or a related topic. Algorithms are described in English and in a pseudocode designed to be readable by anyone who has done a little programming. The book contains 244 figures — many with multiple parts — illustrating how the algorithms work. It also includes careful analysis of the running times of all algorithms. In this third edition, the entire book once again updated including changes cove...
Read more