C Questions and Answers – Mathematical Functions – 1

This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Mathematical Functions – 1”.

Pre-requisite for this C MCQ set: Advanced C Programming Video Tutorial.

1. Which of the following header declares mathematical functions and macros?
a) math.h
b) assert.h
c) stdmat. h
d) stdio. h
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2. All the functions in this library take as a parameter and return as the output.
a) double, int
b) double, double
c) int, double
d) int, int
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3. HUGE_VAL macro is used when the output of the function may not be ___________
a) floating point numbers
b) integer number
c) short int
d) long int
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4. What error occurs if an input argument is outside the domain over which the mathematical function is defined?
a) domain error
b) range error
c) no error
d) domain and range error
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5. A range error occurs if the result of the function cannot be represented as a value.
a) int
b) short int
c) double
d) float
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6. If the result overflows, the function returns the value of the macro HUGE_VAL, carrying the same sign except for the _________ function as the correct value of the function.
a) sin
b) cos
c) cosec
d) tan
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7. If the result underflow, the function returns zero.
a) true
b) false
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8. For the given math function, an error occurs if the arguments are not in the range [-1, +1].

double acos(double x);

a) range error
b) domain error
c) no error
d) domain and range error
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9. Which function returns the arc sine in the range [-pi/2, +pi/2] radians?
a) arcsin()
b) asin()
c) sin()
d) asine()
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10. What will be the output of the following C code?

double x, deg, rad;
x = 1.0;
val = 180.0 / 3.14;
deg = atan (x) * val;
printf("The arc tangent of %lf is %lf degrees", x, deg);

a) The arc tangent of 1.000000 is 45.000000 degrees
b) The arc tangent of 1.000 is 45.000degrees
c) The arc tangent of 1 is 45 degrees
d) The arc tangent of 1.0000is 45.0000degrees
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