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- Question
What are the different types of real data type in C?
Options- A. float, double
- B. short int, double, long int
- C. float, double, long double
- D. double, long int, float
- Correct Answer
- float, double, long double
ExplanationThe floating point data types are called real data types. Hence float, double, and long double are real data types. - 1. Which statement will you add in the following program to work it correctly?
#include<stdio.h> int main() { printf("%f\n", log(36.0)); return 0; }
Options- A. #include<conio.h>
- B. #include<math.h>
- C. #include<stdlib.h>
- D. #include<dos.h> Discuss
- 2. 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?
Options- A. ABCD
- B. DCBA
- C. 0xABCD
- D. Depends on big endian or little endian architecture Discuss
- 3. Which of the following range is a valid long double (Turbo C in 16 bit DOS OS)?
Options- 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 Discuss
- 4. Which of the following statement obtains the remainder on dividing 5.5 by 1.3?
Options- 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 Discuss
- 5. We want to round off x, a float, to an int value, The correct way to do is
Options- 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) Discuss
- 6. What do the following declaration signify?
char *arr[10];
Options- A. arr is a array of 10 character pointers.
- B. arr is a array of function pointer.
- C. arr is a array of characters.
- D. arr is a pointer to array of characters. Discuss
- 7. What do the following declaration signify?
int (*pf)();
Options- A. pf is a pointer to function.
- B. pf is a function pointer.
- C. pf is a pointer to a function which return int
- D. pf is a function of pointer variable. Discuss
- 8. Declare the following statement?
"An array of three pointers to chars".
Options- A.
char *ptr[3](); - B.
char *ptr[3]; - C.
char (*ptr[3])(); - D.
char **ptr[3];
Discuss
- 9. What do the following declaration signify?
int *f();
Options- A. f is a pointer variable of function type.
- B. f is a function returning pointer to an int.
- C. f is a function pointer.
- D. f is a simple declaration of pointer variable. Discuss
- 10. Declare the following statement?
"A pointer to a function which receives an int pointer and returns float pointer".
Options- A.
float *(ptr)*int; - B.
float *(*ptr)(int) - C.
float *(*ptr)(int*) - D.
float (*ptr)(int)
Discuss
Floating Point Issues problems
Search Results
Correct Answer: #include<math.h>
Explanation:
math.h is a header file in the standard library of C programming language designed for basic mathematical operations.
Declaration syntax: double log(double);
Correct Answer: Depends on big endian or little endian architecture
Correct Answer: 3.4E-4932 to 1.1E+4932
Explanation:
The range of long double is 3.4E-4932 to 1.1E+4932
Correct Answer: rem = fmod(5.5, 1.3)
Explanation:
fmod(x,y) - Calculates x modulo y, the remainder of x/y.
This function is the same as the modulus operator. But fmod() performs floating point divisions.
This function is the same as the modulus operator. But fmod() performs floating point divisions.
Example:
#include <stdio.h>
#include <math.h>
int main ()
{
printf ("fmod of 5.5 by 1.3 is %lf\n", fmod (5.5, 1.3) );
return 0;
}
Output:
fmod of 5.5 by 1.3 is 0.300000
Correct Answer: y = (int)(x + 0.5)
Explanation:
Rounding off a value means replacing it by a nearest value that is approximately equal or smaller or greater to the given number.
y = (int)(x + 0.5); here x is any float value. To roundoff, we have to typecast the value of x by using (int)
Example:
#include <stdio.h>
int main ()
{
float x = 3.6;
int y = (int)(x + 0.5);
printf ("Result = %d\n", y );
return 0;
}
Output:
Result = 4.
Correct Answer: arr is a array of 10 character pointers.
Correct Answer: pf is a pointer to a function which return int
Correct Answer:
char *ptr[3];Correct Answer: f is a function returning pointer to an int.
Correct Answer:
float *(*ptr)(int*)Comments
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