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C Programming :: Floating Point Issues

  1. What are the different types of real data type in C ?

  2. A.
    float, double
    B.
    short int, double, long int
    C.
    float, double, long double
    D.
    double, long int, float

  3. What will you do to treat the constant 3.14 as a long double?

  4. A.
    use 3.14LD
    B.
    use 3.14L
    C.
    use 3.14DL
    D.
    use 3.14LF

  5. If the binary eauivalent of 5.375 in normalised form is 0100 0000 1010 1100 0000 0000 0000 0000, what will be the output of the program (on intel machine)?

     #include
     #include<math.h></span> 
      int main() 
      {   
         float a=5.375;  
         char *p;     
         int i;  
         p = (char*)&a;   
         for(i=0; i3; i++)          
           printf("x\n", (unsigned char)p[i]); 
         return 0; } 
    

  6. A.

    40 AC 00 00

    B.

    04 CA 00 00

    C.

    00 00 AC 40

    D.

    00 00 CA 04


  7. Which of the following range is a valid long double (Turbo C in 16 bit DOS OS) ?

  8. A.
    3.4E-4932 to 1.1E+4932
    B.
    3.4E-4932 to 3.4E+4932
    C.
    1.1E-4932 to 1.1E+4932
    D.
    1.7E-4932 to 1.7E+4932

  9. Which statement will you add in the following program to work it correctly?

     #include
     int main()
     {    
         printf("%f\n", log(36.0));       
         return 0;
     } 
    

  10. A.

    #include

    B.

    #include<math.h></p>

    C.

    #include

    D.

    #include


  11. We want to round off x, a float, to an int value, The correct way to do is

  12. A.
    y = (int)(x + 0.5)
    B.
    y = int(x + 0.5)
    C.
    y = (int)x + 0.5
    D.
    y = (int)((int)x + 0.5)

  13. The binary equivalent of 5.375 is

  14. A.
    101.101110111
    B.
    101.011
    C.
    101011
    D.
    None of above

  15. A float occupies 4 bytes. If the hexadecimal equivalent of these 4 bytes are A, B, C and D, then when this float is stored in memory in which of the following order do these bytes gets stored?

  16. A.
    ABCD
    B.
    DCBA
    C.
    0xABCD
    D.
    Depends on big endian or little endian architecture

  17. What will you do to treat the constant 3.14 as a float?

  18. A.
    use float(3.14f)
    B.
    use 3.14f
    C.
    use f(3.14)
    D.
    use (f)(3.14)

  19. Which of the following statement obtains the remainder on dividing 5.5 by 1.3 ?

  20. A.
    rem = (5.5 % 1.3)
    B.
    rem = modf(5.5, 1.3)
    C.
    rem = fmod(5.5, 1.3)
    D.
    Error: we can't divide