C programming questions based on Array.

• What are Arrays in C programming?
• Give the importance of Array in C language.
• What do you mean by subscript in C array?
• Explain the difference between char and int array.
• What do you mean by compile time initialization? Give suitable example of Compile time initialization of C Array.
• Describe difference between runtime and compile time initialization of array in C program.
• Give suitable example of 1-D array declaration and initialization.
• Justify the statement: C compiler never check the array index out of bound error.
• Write a C program to demonstrate 2-D array declaration and runtime initialization.
• Describe the array index out of bound error in context of C array program.
• What do you mean by multi dimensional array?
• Give suitable example to access 2-D array elements.
• Justify the statement: Array index always begins with zero.

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C programming Questions based on File Management.

• List various modes of opening a file in C program.
• Give the difference between “r”, “w” and “a” mode of file opening in C program.
• What is the difference between w and w+ mode?
• State the use of fopen() and fclose() function in C program.
• Give the name of function which can be used to read a single character from a file in C program.
• What is the use of FILE in C file management program?
• Give the name of function which can be used to read a line from a file in C program.
• What is the use of fprintf() function in C program?
• Give difference between fputc() and fputs() function.
• State the use of fscanf() function in C program.
• Give difference between fgets() and fgetc() function. 

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C programming questions based on Basic Concepts.

• What is the use of <stdio.h> in c program?
• What do you mean by .exe file?
• Give the difference between Source file and Executable file.
• What do you mean by Data types in C program?
• State the difference between int and float data type.
• Give the list of basic data types used in C program.
• Explain the difference between float, char and int data type with suitable example.
• What is the memory size occupied by char type variable?
• State the purpose of semicolon in C program.
• Give the use of #include in a C program.
• What are identifiers in C language? State the use of identifiers in C program.
• What are keywords in C language? Give list of any 10 C keywords.
• Give the difference between break and continue.
• State the use of goto statement in C language with suitable example.
• Describe the use of sizeof keyword in C program with suitable example.
• What do you mean by unsigned int in C program?
• State the examples of whitespace characters used in C program.
• What are enumerated data types in C language?
• Give examples of derived data types of C language.

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Count occurrences of alphabets in the given paragraph.

//Count occurrences of alphabets in the given paragraph. //This program will count only A to Z alphabets. #include<stdio.h> int main(){      int i, counter[26]={}, ch;      char str[100];       puts("Enter your paragraph:");      gets(str);           for(i=0; i<strlen(str); i++)         {            ch=str[i];            counter[ch-65]++;      }      printf("Character and it's frequency is as under:\n");      for(i=0; i<26; i++)       {            if(counter[i]!=0)                 printf("%c = %d \n", i+65,counter[i]);      }      return 0; }

Output of the program:

Enter your paragraph:

HELLO STUDENT HOW ARE YOU

Character and it's frequency is as under:

A = 1

D = 1

E = 3

H = 2

L = 2

N = 1

O = 3

R = 1

S = 1

T = 2

U = 2

W = 1

Y = 1

C program to print password as star ( ***** )

C program to print password as star ( ***** ) #include<stdio.h> int main(){      int i;      char ch1, password[10];      printf("Enter your password:");      for(i=0; i<10; i++)      {              ch1=getch();              password[i]=ch1;                     if(ch1!=13)      //13 is ASCII of Enter key                    printf("*");              if(ch1 == 13)                    break;       }       password[i]='\0';       printf("\n%s", password);       return 0; }

Output of the program:

Enter your password:*****

Your actual password is hello

C program to print text at given position on screen.

C program to print text at given position on screen. #include <windows.h> #include<stdio.h> #include<conio.h> COORD c = {0, 0}; void setxy (int x, int y) {  c.X = x; c.Y = y; // Set X and Y coordinates  SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), c); } int main() {  int x, y, rollno;  char name[10];  printf("Enter your Roll No.:");  scanf("%d", &rollno);  printf("Enter your name:");  scanf("%s", name);  printf("Where you want to print on Screen?\n");  printf("Enter your X coordinate:");  scanf("%d", &x);  printf("Enter your Y coordinate:");  scanf("%d", &y);  setxy(x,y);  printf("Your Roll No. is %d.", rollno);  setxy(x,y+1); //add 1 in y to print at new line  printf("Your Name is %s.", name);  return 0; }

Output of the program:

Enter your Roll No.:101

Enter your name:Purva

Where you want to print on Screen?

Enter your X coordinate:10

Enter your Y coordinate:10

          Your Roll No. is 0.

          Your Name is Purva.

C program to implement Stack using array.

#include<stdio.h> void push(); void pop(); void display_stack(); int stack_pointer=0, stack[10]; int main() {   int n;   do{       printf("===== Stack Operation =====\n");       printf("1. Push\n2. Pop\n3. Display Stack\n4. Exit\n");       printf("Enter your choice:");       scanf("%d", &n);       switch(n){         case 1: push();                 if(stack_pointer>=10)                 {                   printf("Stack is full.\n");                   exit(0);                 }                 break;         case 2: pop();                 break;         case 3: display_stack();                 break;         case 4: printf("Thank you. Have a nice time..");                 break;         default:                 printf("Select proper menu item.\n");         }   }while(n != 4);   return 0;  } void push(){    printf("\nPush Operation\n");    printf("--------------\n");    printf("Enter number to be pushed:");    scanf("%d", &stack[stack_pointer++]);    printf("Push Operation performed.\n");    printf("-------------------------\n\n"); } void pop(){    printf("\nPop Operation performed.\n");    printf("------------------------\n");    printf("Popped out element from stack is %d\n\n", stack[stack_pointer-1]);    stack_pointer--;    getch();//developed by kp } void display_stack(){    int i;    if(stack_pointer==0)        printf("Stack is empty.\n\n");    else    {        printf("\nStack Elements are as under:\n");        printf("----------------------------\n");        for(i=0; i<stack_pointer; i++)        {            printf("%d\n", stack[i]);        }    }    printf("\nPress any key to continue...\n\n");    getch();//cprogrampracticals.blogspot.in }

Output of the program:

===== Stack Operation =====

1. Push

2. Pop

3. Display Stack

4. Exit

Enter your choice:1

Push Operation

--------------

Enter number to be pushed:5

Push Operation performed.

-------------------------

===== Stack Operation =====

1. Push

2. Pop

3. Display Stack

4. Exit

Enter your choice:1

Push Operation

--------------

Enter number to be pushed:10

Push Operation performed.

-------------------------

===== Stack Operation =====

1. Push

2. Pop

3. Display Stack

4. Exit

Enter your choice:3

Stack Elements are as under:

----------------------------

5

10

Press any key to continue...

===== Stack Operation =====

1. Push

2. Pop

3. Display Stack

4. Exit

Enter your choice:2

Pop Operation performed.

------------------------

Popped out element from stack is 10

===== Stack Operation =====

1. Push

2. Pop

3. Display Stack

4. Exit

Enter your choice:4

Thank you. Have a nice time..

Bubble sort algorithm implementation.

#include<stdio.h> int main() {      int i, j, n, temp, data[10];      printf("Enter total numbers to be sorted:");      scanf("%d",&n);      //This program will be able to sort max 10 numbers.           for(i=0; i<n; i++)      {            printf("Enter data[%d]:",i);            scanf("%d",&data[i]);      }      printf("Unsorted data:");      for(i=0; i<n; i++)            printf("%d, ", data[i]);           for(i=0; i<n; i++)      {            for(j=0; j<n-i-1; j++)            {                 if(data[j] > data[j+1])                 {                      temp = data[j];                      data[j] = data[j+1];                      data[j+1] = temp;                 }                                 }      }           printf("\nSorted data:");      for(i=0; i<n; i++)            printf("%d, ", data[i]);      return 0; }

Output of the program:

Enter total numbers to be sorted:5

Enter data[0]:1

Enter data[1]:3

Enter data[2]:2

Enter data[3]:4

Enter data[4]:5

Unsorted data:1, 3, 2, 4, 5,

Sorted data:1, 2, 3, 4, 5,

C function with an argument and no return value.

//C function with an argument and no return value. #include<stdio.h> void print_line(int); int main() {      print_line(2);  //this will pass 2 two print_line() function           printf("Hello World\n");           print_line(3);  //this will pass 3 two print_line() function           return 0;  } void print_line(int n) {      int i;      for(i=0; i<n; i++)      {            printf("------------\n");       } }

Output of the program:

------------

------------

Hello World

------------

------------

------------

C function with no arguments and no return value.

//C Function with no arguments and no return value. #include<stdio.h> void print_line(); void main() {      print_line();           printf("Hello World\n");           print_line(); } //void in the function indicates no return value.  void print_line()  {      printf("------------\n"); }

Output of the programs:

------------

Hello World

------------

C Programming Quiz - 1 (1st October 2016)

C Programming Quiz - 1 (1st October 2016) with answer

1. Predict the output: int main() {             int number[5]={1,2,3,4,5};             printf("%d\n", number[5]);             return 0; } A. 5 B. 0 C. Error D. Any random number Answer: D Description: This will print any random number as number [5] is out of boundary of declared array. In c language, it is programmer’s responsibility to track array index out of bound error. 2. Predict the output: int main(){             int matrixA[3][3]={};             printf("MatrixA[1][0] = %d\n",  matrixA[1][0] );             return 0; } A. 0 B. 3 C. Error D. 10 Answer: A MatrixA[1][0] automatically initialized to zero due to compile time initialization. 3. Predict the output: #include<stdio.h> #include<string.h> int main() {             char str1[10]="abc", str2[10]="xyz", str3[10]="pqr", str4[10];             printf("%s",strcat(strcat(strcpy(str4, str3),str1),str2));             return 0; } A. pqrabcxyz B. pqrxyz C. abcxyzpqr D. Error Answer: A Here, inner most function strcpy will be executed first; and then outer functions strcat will be executed. 4. Predict the output: #include<stdio.h> int main(){     char *p, str[10]="Ahmedabad";     p = &str;     printf("%c",*p+1);     return 0; } A. A B. h C. m D. B Answer: D This will print B, *p is A (i.e. 65), when added 1 gives B (i.e. 66 ) 5. Predict the output: #include<stdio.h> void main(){     char arr[10]="The Indian Programmers";     printf("%s",arr); } A. The Indian B. The Indian Programmers C. The D. None of these Answer: A This will print first ten characters, as size of arr is 10.

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