Floating Point Types C++ MCQ

1. Which of the following is not one of the sizes of the floating point types?
a) short float
b) float
c) long double
d) double

Answer:a

2. Which of the following is a valid floating point literal?
a) f287.333
b) F287.333
c) 287.e2
d) 287.3.e2

Answer:c

3. What is the range of the floating point numbers?
a) -3.4E+38 to +3.4E+38
b) -3.4E+38 to +3.4E+34
c) -3.4E+38 to +3.4E+36
d) -3.4E+38 to +3.4E+32

Answer:a

4. Which of three sizes of floating point types should be used when extended precision is required?
a) float
b) double
c) long double
d) extended float

Answer:c

5. What is the output of this program?

1.     #include <iostream>

2.     using namespace std;

3.     int main()

4.     {

5.         float num1 = 1.1;

6.         double num2 = 1.1;

7.         if (num1 == num2)

8.            cout << "Vansh";

9.         else

10.            cout << "Sharma";

11.         return 0;

12.     }

a) Vansh
b) Sharma
c) compile time error
d) runtime error

Answer:a

6. What is the output of this program?

1.     #include <iomanip>

2.     #include <iostream>

3.     using namespace std;

4.     int main()

5.     {

6.         cout << setprecision(17);

7.         double d = 0.1;

8.         cout << d << endl;

9.         return 0;

10.     }

a) 0.11
b) 0.10000000000000001
c) 0.100001
d) compile time error

Answer:b

7. What is the output of the following program?

1.     #include <iostream>

2.     using namespace std;

3.     int main()

4.     {

5.         float i = 123.0f;

6.         cout << i << endl;

7.         return 0;

8.     }

a) 123.00
b) 1.23
c) 123
d) compile time error

Answer:c

8. Which is used to indicate single precision value?
a) F or f
b) L or l
c) either a or b
d) neither a or b

Answer:a

9. What is the output of this program?

1.     #include <iostream>

2.     using namespace std;

3.     int main()

4.     {

5.         float f1 = 0.5;

6.         double f2 = 0.5;

7.         if (f1 == 0.5f)

8.             cout << "equal";

9.         else

10.             cout << "not equal";

11.         return 0;

12.     }

a) equal
b) not equal
c) compile time error
d) runtime error

Answer:a

10. Which is correct with respect to size of the datatypes?
a) char > int < float
b) int < char > float
c) char < int < float
d) double < char > int

Answer:c