6. What will be the output of the following C code?
   

   #include <stdio.h>
   #include <math.h>
       int main()
       {
           unsigned int num = 15;
           printf("%f\n", fabs(num));
           return 0;
       }
   

1. 1. Compilation Error

   
   
   

   2. Undefined behaviour

   
   
   

   3. 15

   
   
   

   4. 15.000000

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   15.000000

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7. What type of inputs are accepted by mathematical functions?
   

1. 1. int

   
   
   

   2. short

   
   
   

   3. double

   
   
   

   4. float

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   double

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8. Which of the following is not a valid mathematical function?
   

1. 1. atan2(x,y);

   
   
   

   2. fmod(x);

   
   
   

   3. frexp(x);

   
   
   

   4. srand(x);

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   fmod(x);

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9. In linux, apart from including math header file, the program is successfully executed by which of the following?
   

1. 1. cc -lm filename.c

   
   
   

   2. cc -math filename.c

   
   
   

   3. cc filename.c -lc

   
   
   

   4. cc filename.c

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   cc -lm filename.c

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10. What will be the output of the following C statement?
    

    int ungetc(int c, FILE *fp)
    

1. 1. file

   
   
   

   2. fp

   
   
   

   3. Nothing

   
   
   

   4. Either c or EOF for an error

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Either c or EOF for an error

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