Exam-style question
Try this first
Which statement about a real number represented using binary fractions is correct?.
- A.It is exact if it can be represented as a binary fraction in the available number of bits
- B.It is exact only if its decimal notation has no digits after the decimal point
- C.It is always exact if floating point is used
- D.It is exact only when its value is greater than one
Model answer
What a good answer should say
- It is exact if it can be represented as a binary fraction in the available number of bits
Explanation
Why this works
The specification states that a real number is represented exactly when it can be represented by a binary fraction in the given number of bits. Otherwise, rounding may be required.
Common mistake
No common mistake is linked to this question yet.