Q 1 - What is the output of the following code snippet?

#include<stdio.h>
main() 
{ 
   int const a = 5; 
   a++; 
   printf(“%d”,a); 
} 

A - 5
B - 6
C - Runtime error
D - Compile error

Q 2 - What is the output of the following code snippet?

#include<stdio.h>
main() 
{ 
   const int a = 5; 
   a++; 
   printf("%d", a); 
}

A - 5
B - 6
C - Runtime error
D - Compile error

Q 3 - What is the output of the below code snippet?

#include<stdio.h>
main() 
{ 
   char s[]="hello", t[]="hello";
   if(s==t){
   printf("eqaul strings");
}
}

A - Equal strings
B - Unequal strings
C - No output
D - Compilation error

Q 4 - What is the output of the below code snippet?

#include<stdio.h>
main() 
{ 
   int a = 5, b = 3, c = 4; 

   printf("a = %d, b = %d\n", a, b, c);
}

A - a=5, b=3
B - a=5, b=3, c=0
C - a=5, b=3, 0
D - compile error

Q 5 - What is the output of the below code snippet?

#include<stdio.h>

main() 
{ 
   int a = 1; 
   float b = 1.3; 
   double c;

   c = a + b; 
   printf("%.2lf", c);
}

A - 2.30
B - 2.3
C - Compile error
D - 2.0

Q 6 - What is the output of the following program?

#include<stdio.h>
main() 
{
      enum { india, is=7, GREAT };

      printf("%d %d", india, GREAT);
}

A - 0 1.
B - 0 2
C - 0 8
D - Compile error

Q 7 - What is the output of the following code snippet?

#include<stdio.h>
main() 
{
    char c = 'A'+255;

    printf("%c", c);
}

A - A
B - B
C - Overflow error at runtime
D - Compile error

Q 8 - What is the output of the following code snippet?

#include<stdio.h>
main() 
{
   short unsigned int i = 0; 

   printf("%u\n", i--);
}

A - 0
B - Compile error
C - 65535
D - 32767

Q 9 - What is the output of the below code snippet?

#include<stdio.h>
main() 
{
   unsigned x = 5, y=&x, *p = y+0; 

   printf("%u",*p);
}

A - Address of x
B - Address of y
C - Address of p
D - 5

Q 10 - What is your comment on the below C statement?

   signed int *p=(int*)malloc(sizeof(unsigned int));

A - Improper type casting
B - Would throw Runtime error
C - Memory will be allocated but cannot hold an int value in the memory
D - No issue with the statement

Q 11 - What is the output of the following code snippet?

#include<stdio.h>
main() 
{
   int x = 5;

   if(x==5)
   {
       if(x==5) break;
       printf("Hello");
   } 
   printf("Hi");
}

A - Compile error
B - Hi
C - HelloHi
D - Hello

Q 12 - What is the output of the following code snippet?

#include<stdio.h>
main() 
{
   int x = 5;

   if(x=5)
   {
       if(x=5) break;
       printf("Hello");
   } 
   printf("Hi");
}

A - Compile error
B - Hi
C - HelloHi
D - Compiler warning

Q 13 - What is the output of the following code snippet?

#include<stdio.h>
main() 
{
   int x = 5;

   if(x=5)
   {
      if(x=5) printf("Hello");
   } 
   printf("Hi");
}

A - HelloHi
B - Hi
C - Hello
D - Compiler error

Q 14 - What is the output of the below code snippet?

#include<stdio.h>

main() 
{
   for(;;)printf("Hello");
}

A - Infinite loop
B - Prints “Hello” once.
C - No output
D - Compile error

Q 15 - What is the output of the below code snippet?

#include<stdio.h>

main() 
{
   for()printf("Hello");
}

A - Infinite loop
B - Prints “Hello” once.
C - No output
D - Compile error

Q 16 - What is the output of the below code snippet?

#include<stdio.h>

main() 
{
   for(1;2;3)
      printf("Hello");
}

A - Infinite loop
B - Prints “Hello” once.
C - No output
D - Compile error

Q 17 - int x=~1; What is the value of 'x'?

A - 1
B - -1
C - 2
D - -2

Q 18 - What is the output of the following program?

#include<stdio.h>

void f() 
{ 
   static int i;

   ++i; 
   printf("%d", i); 
}

main()
{ 
   f(); 
   f(); 
   f(); 
}

A - 1 1 1
B - 0 0 0
C - 3 2 1
D - 1 2 3

Q 19 - What is the output of the following code snippet?

#include<stdio.h>

main()
{ 
   int *p = 15; 
   printf("%d",*p);
}

A - 15
B - Garbage value
C - Runtime error
D - Compiler error

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Q 20 - What is the output of the following program?

#include<stdio.h>

main()
{
    register int x = 5;

    int *p;
    p=&x;
    x++;
    printf("%d",*p);
}

A - Compile error
B - 5
C - 6
D - Garbage value

Q 21 - What is the output of the following program?

#include<stdio.h>

main()
{
   int x = 65, *p = &x;

   void *q=p;
   char *r=q;
   printf("%c",*r);
}

A - Garbage character.
B - A
C - 65
D - Compile error

Q 22 - What is the output of the following program?

#include<stdio.h>

void f() 
{
    printf(“Hello\n”);
}
main() 
{
 ;
}

A - No output
B - Error, as the function is not called.
C - Error, as the function is defined without its declaration
D -Error, as the main() function is left empty

Q 23 - What is the output of the following program?

#include<stdio.h>

main()
{
   printf("\");
}

A - \
B - \"
C - "
D - Compile error

Q 24 - What is the output of the following program?

#include<stdio.h>

{ 
   int x = 1;
   switch(x) 
   {
      default: printf("Hello");
      case 1: printf("hi"); break;
   }
}

A - Hello
B - Hi
C - HelloHi
D - Compile error

Q 25 - What is the output of the following program?

#include<stdio.h>

main()
{ 
   struct { int x;} var = {5}, *p = &var;

   printf("%d %d %d",var.x,p->x,(*p).x); 
}

A - 5 5 5
B - 5 5 garbage value
C - 5 5 0
D - Compile error

Q 26 - What is the output of the following program?

#include<stdio.h>

void swap(int m, int n)
{
   int x = m;

   m = n;
   n = x;
}
main()
{
   int x=5, y=3;

   swap(x,y);
   printf("%d %d", x, y);
}

A - 3 5
B - 5 3
C - 5 5
D - Compile error

Q 27 - What will be printed for the below statement?

#include<stdio.h>

main()
{
   printf("%d",strcmp("strcmp()","strcmp()"));
}

A - 0
B - 1
C - -1
D - Invalid use of strcmp() function

Q 28 - What is the following program doing?

#include<stdio.h>

main()
{
   FILE *stream=fopen("a.txt",'r');
}

A - Trying to open “a.txt” in reading mode
B - Trying to open “a.txt” in write mode.
C - “stream” is an invalid identifier
D - Compile error

Q 29 - What is the output of the following program?

#include<stdio.h>

main()
{   
   int r, x = 2;
   float y = 5;

   r = y%x;
   printf("%d", r); 
}

A - 1
B - 0
C - 2
D - Compile error

Q 30 - Which operator is used to continue the definition of macro in the next line?

A - #
B - ##
C - $
D - \

Q 31 - What is the size of the following union definition?

#include<stdio.h>

union abc { 
    char a,b,c,d,e,f,g,h; 
    int i;
}abc;

main()
{
   printf( "%d", sizeof( abc ));
}

A - 1
B - 2
C - 4
D - 8

Q 32 - What is the size of ‘int’?

A - 2
B - 4
C - 8
D - Compiler dependent

Q 33 - The type name/reserved word ‘short’ is _______.

A - short long
B - short char
C - short float
D - short int

Q 34 - What is the value of ‘y’ for the following code snippet?

#include<stdio.h>

main()
{
   int x = 1;

   float y = x>>2;

   printf( "%f", y );
}

A - 4
B - 0.5
C - 0
D - 1

Q 35 - What is the output of the following program?

#include<stdio.h>

main()
{  
   float t = 2;

   switch(t)
   {
       case 2: printf("Hi");
       default: printf("Hello");
   }
}

A - Hi
B - HiHello
C - Hello
D - Error

Q 36 - What is the output of the following program?

#include<stdio.h>

main()
{
   int i = 1;

   while(++i <= 5)
      printf("%d ",i++);
}

A - 1 3 5
B - 2 4
C - 2 4 6
D - 2

Q 37 - What is the output of the following program?

#include<stdio.h>

main()
{
   int i = 1;

   while( i++<=5 )
      printf("%d ",i++);
}

A - 1 3 5
B - 2 4
C - 2 4 6
D - 2

Q 38 - What is the output of the following program?

#include<stdio.h>

main()
{
   int i = 1;

   while(i++<=5);
       printf("%d ",i++);
}

A - 4
B - 6
C - 2 6
D - 2 4

Q 39 - What is the output of the following program?

#include<stdio.h>

main()
{
   int x = 1;

   do
      printf("%d ", x);
   while(x++<=1);
}

A - 1
B - 1 2
C - No output
D - Compile error

Q 40 - What is the output of the following program?

#include<stdio.h>

main()
{ 
   int a[] = {1,2}, *p = a;

   printf("%d", p[1]); 
}

A - 1
B - 2
C - Compile error
D - Runtime error

Q 41 - What is the output of the following program?

#include<stdio.h>

main()
{ 
   int a[3] = {2,1};

   printf("%d", a[a[1]]); 
}

A - 0
B - 1
C - 2
D - 3

Q 42 - What is the output of the following program?

#include<stdio.h>

main()
{ 
   int a[3] = {2,,1};

   printf("%d", a[a[0]]); 
}

A - 0
B - 1
C - 2
D - Compile error

Q 43 - What is the output of the following program?

#include<stdio.h>

main()
{ 
   int a[] = {2,1};

   printf("%d", *a); 
}

A - 0
B - 1
C - 2
D - Compile error.

Q 44 - What is the output of the following program?

#include<stdio.h>

main()
{
   int i = 1;

   Charminar:
   printf("%d ",i++);
   if(i==3) break;
   if(i<=5) goto Charminar;
}

A - 1 2
B - 1 2 3
C - 1 2 4 5
D - Compile error

Q 45 - What is the output of the following program?

#include<stdio.h>

main()
{ 
   int i = 13, j = 60;

   i ^= j;
   j ^= i;
   i ^= j;

   printf("%d %d", i, j);
}

A - 73 73
B - 60 13
C - 13 60
D - 60 60

Q 46 - What is the output of the following program?

#include<stdio.h>

main()
{
   union abc {
      int x;
      char ch;
   }var;

   var.ch = 'A';
   printf("%d", var.x);
}

A - A
B - Garbage value
C - 65
D - 97

Q 47 - Identify the incorrect file opening mode from the following.

A - r
B - w
C - x
D - a

Q 48 - Function fopen() with the mode "r+" tries to open the file for _______.

A - reading and writing
B - reading and adding new content
C - only for reading
D - it works only for directories

Q 49 - Identify the invalid constant used in fseek() function as ‘whence’ reference.

A - SEEK_SET
B - SEEK_CUR
C - SEEK_BEG
D - SEEK_END

Q 50 - First operating system designed using a C programming language.

A - DOS
B - Windows
C - UNIX
D - Mac

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