16. log(x) function defined in math.h header file is __________.
    

1. 1. Logarithm to the base 2

   
   
   

   2. Logarithm to the base 10

   
   
   

   3. Natural base logarithm

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Natural base logarithm

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

    #include <stdio.h>
    #include <math.h>
        int main()
        {
            int n = 10;
            printf("%f\n", log10(n));
            return 0;
        }
    

1. 1. 10

   
   
   

   2. Compilation Error

   
   
   

   3. 2.302585

   
   
   

   4. 1.000000

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   1.000000

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18. 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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19. 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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20. 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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