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# Thread: what is bug density?

1. ## what is bug density?

I an MNC interview. Interviewer ask me what is bug density?

2. ## Re: what is bug density?

More_enjoy,

Rather than just playing a Flash Card game of "what does this mean?" and "what does that mean?" it would be better if you told us how you answered these interview questions (or how you will answer them).

Do you know what a bug is?
Do you know what the word density means?

What do you think bug density means?

That way, we can help you tune up your answers and engage in a discussion, rather than just playing the part of a dictionary.

3. ## Re: what is bug density?

Where was this question asked in the interview? This seems like a benchmarking question because it just seems very simple. As Joe says, it's a matter of mashing together two dictionary definitions.

If this was later on in an interview and I had actually qualified your skills or knowledge, then I might ask something more provoking like, "How have you used Bug Denisty in your past experience?"

This asks to describe your experience. If you were asked this very early on and you couldn't crack it, then you might be in trouble. How did you answer?

4. ## Re: what is bug density?

Have you guys actually used this term? I can guess what it might mean, but don't think I've encountered it before.

5. ## Re: what is bug density?

Sure. But it has to be relative to something. For example, you might say "what is the bug density per build in the first 5 builds versus the next 5?" or "What is the bug density in the floggletoggle engine versus the rest of the product?"

6. ## Re: what is bug density?

Yeah, I use it more in the estimation arena though and that requires a little historical reference, too.

7. ## Re: what is bug density?

It is a metric and as Peter said, it's relative. Here's some basics:

number of bugs found in 1000 lines of code
bugs divided by classes

Proposal: FindBugs Bug Density metric (long)
http://osdir.com/ml/java.findbugs.ge.../msg00010.html

8. ## Re: what is bug density?

More_enjoy,

Reply to Joe now or he'll throw his Quality brand brick at you and you will not enjoy it anyMore. [img]/images/graemlins/laugh.gif[/img]

9. ## Re: what is bug density?

its the number of bugs found per some lines of the codes

10. ## Re: what is bug density?

This is really in the Software Reliability Management area. It is the number of bugs per (1000) thousand source lines of code.(KSLOC)
This is used to predict remaining faults by comparison with expected fault density.
The defect density measure can be used after design and code inspections.
If at a certain point the bug density was known and if there was going to be addition of some more source code then that could be used to predict the number of bugs that will be found in the new software after it had been coded.
If you were asked this question in an interview then certainly you were going for a lead or a manager position.

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