Discussion
Which line rests on a mistaken assumption?
public class Sample36
{
static double ratio(int num, int den)
{
return (double) num / den;
}
public static void main(String[] args)
{
double r = ratio(0, 0);
assert r == r : "not itself";
System.out.printf("%s%n", r);
}
}
Answer: D
Dividing zero by zero in floating point gives NaN, and NaN compares unequal to everything including itself, so this assertion fails on an expression that looks tautological. Testing for NaN needs Double.isNaN(d). Note the division does not throw, unlike integer division by zero.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development