C Programming interview questions latest for all

                                        C Programming
1. Which of the following about the following two declaration is true
       i ) int *F()
       ii) int (*F)()
       Choice :
      a) Both are identical
      b) The first is a correct declaration and the second is wrong
      c) The first declaraion is a function returning a pointer to an integer and the second is a pointer to function returning
         int
      d) Both are different ways of declarin pointer to a function     Answer : c) The first de...

2. What are the values printed by the following program?                                           
         #define dprint(expr) printf(#expr "=%d\n",expr)
         main()
            {
              int x=7;
              int y=3;
              dprintf(x/y);
          }
          Choice:
           a) #2 = 2 b) expr=2 c) x/y=2 d) none
            Answer: c)x/y=2
3. Which of the following is true of the following program
       main()
            {
             char *c;
             int *p;
             c =(char *)malloc(100);
             ip=(int *)c;
             free(ip);
           }
          ans: The code functions properly releasing all the memory allocated
4.output of the following.                                                                                        
            main()
                 {
                   int i;
                   char *p;
                   i=0X89;
                   p=(char *)i;
                   p++;
                   printf("%x\n",p);
                    }
             ans:0X8A
5  which of the following is not a ANSI C language keyword?  ans:Function.
6. When an array is passed as parameter to a function, which of the following statement is correct  choice:
       a) The function can change values in the original array
       b) In C parameters are passed by value. The funciton cannot change the original value in the array
       c) It results in compilation error when the function tries toaccess the elements in the array
       d) Results in a run time error when the funtion tries to access the elements in the array
        Answer: a) The fu...
7. The type of the controlling expression of a switch statement cannot be of the type
        a) int b) char c) short d)float e) none
        Answer : d)float
8. What is the value of the expression (3^6) + (a^a)?
     a) 3     b) 5    c) 6     d) a+18       e) None
     Answer : 5
9. What is the value assigned to the variable X if b is 7 ?
       X = b>8 ? b <<3 : b>4 ? b>>1:b;
       a) 7 b) 28 c) 3 d) 14 e) None
        ans: 3;
10. Which is the output produced by the following program
                main()
                  {
                   int n=2;
                   printf("%d %d\n", ++n, n*n);
                    }
       a) 3,6 b) 3,4 c) 2,4 d) cannot determine
        Answer : b) 3,4
11. What is th output of the following program?                                                             
         int x= 0x65;
         main()
            {
             char x;
             printf("%d\n",x)
           }
       a) compilation error     b) 'A'     c) 65       d) unidentified
12. What is the output of the following program
         main()
             {
              int a=10;
              int b=6;
              if(a=3)
              b++;
              printf("%d %d\n",a,b++);
              }
          a) 10,6 b)10,7 c) 3,6 d) 3,7 e) none
           Answer : d) 3,7
13. What can be said of the following program?
          main()
             {
                enum Months {JAN =1,FEB,MAR,APR};
                Months X = JAN;
                if(X==1)
                   {
                     printf("Jan is the first month");                                                              
                  }
             }
          a) Does not print anything
          b) Prints : Jan is the first month
          c) Generates compilation error
          d) Results in runtime error
           Answer: b) Prints : Jan..
14. What is the output of the following program?
           main()
                 {
                     char *src = "Hello World";
                     char dst[100];
                     strcpy(src,dst);
                     printf("%s",dst);
                     }strcpy(char *dst,char *src)
                       {while(*src) *dst++ = *src++;
                        }
                       ) "Hello World" b)"Hello" c)"World" d) NULL e) unidentified
                      Answer: d) NULL
15. What is the output of the following program?
                 main()
                        {
                          int l=6;
                          switch(l)
                          { default : l+=2;
                            case 4: l=4;
                            case 5: l++;
                            break;
                            }
                            printf("%d",l);                                                                                      
                              }
                    a)8 b)6 c)5 d)4 e)none
                    Answer : c)5
16. What is the output of the following program?
            main()
                   {
                    int x=20;
                    int y=10;
                    swap(x,y);
                    printf("%d %d",y,x+2);
                  }
                     swap(int x,int y)
                             {
                               int temp;
                               temp =x;
                               x=y;
                                y=temp;
                             }
                     a)10,20 b) 20,12 c) 22,10 d)10,22 e)none
                   Answer:d)10,22
17. What is the output of the following problem ?
            #define INC(X) X++
             main()
               {
                int X=4;
                printf("%d",INC(X++));
               }
              a)4 b)5 c)6 d)compilation error e) runtime error
               Answer : d) compilation error
18. what can be said of the following
            struct Node {
            char *word;
             int count;
             struct Node left;
              struct Node right;
               }
                 a) Incorrect definition
                 b) structures cannot refer to other structure
                 c) Structures can refer to themselves. Hence the statement is  OK
                 d) Structures can refer to maximum of one other structure
                 Answer :c)
19. What is the size of the following union. Assume that the size of int =2, size of float =4 and size of
       char =1.
       Union Tag{
         int a;
         flaot b;
        char c;
           };
        a)2 b)4 c)1 d) 7                                                                                                            
20.  What is the output of the following program? (. has been used to indicate  a space)
            main()
             {
              char s[]="Hello,.world";
             printf(%15.10s",s);
           }
           a )Hello,.World...
           b)....Hello,.Wor
           c)Hello,.Wor....
           d)None of the abov