Toughest part of dev interviews? There are multiple I can think of.

Getting an interview altogether in this dumpster fire of an economy.

Negotiating salary (i.e. prevent getting a low-ball offer)

When the interviewer is a dev themselves and they get on a power trip and ask you the toughest/trickiest questions.

Convincing the interviewer that something you don't know now can be learned later just by googling and tinkering around.

Trying not to burst out in anger when you get asked stupid questions like "Why aren't you married?"

wow, the last question... maybe she is interested in you?

While I do agree that the last one should not be part of an interview and might even be legally questionable I can see several reasons for it, especially if its in a culture where your “expected” to be married at a certain age.

They could use it to identify commitment issues or similar, which
Is why I think it does not belong and might be overstepping some personal integrity boundaries.

I would at least consider it a red flag.

@Voxera Being married/single has nothing to do with a job requirement. Following your logic, a divorced guy/single father should never get a job, right?

@Sid2006 To be fair to Voxera, she says it's "a red flag", "should not be part of an interview" and "might even be legally questionable", so it's not like it's 'her logic'.

@Voxera "They could use it to identify commitment issues or similar" More like they could use it to convince themselves they were identifying commitment issues. Real people are far more complex. Did it show committment to stay in a bad relationship? Did it show courage to leave one? You have no way of knowing, because an interview situation will never give you even remotely enough information to make any sort of proper judgement.

I'd reply something like, I'm here for a job, not a date.

“We are trying to figure out if you are following The Life Script TM, please let us know if you are married and have kids. Having pets is optional but welcomed. If you are not following The Script, we need full details on your reasons for it and an improvement plan.”

@Sid2006 I never said it was a good thing but I do know that some think that at a certain age you should be married and if not, there is something wrong, which is why I said such questions are red flags, they most likely have a bad corporate environment.

@Voxera Oh so the question is a red flag.

@Sid2006 In my opinion yes, unless they have a VERY good explanation.

If they are talking benefits and insurances or similar and have extra options for family it might be ok, but then they should really start there and ask if you have family, and in that case they would be the ones driving you to join, in which case I doubt it would have ended up a rant here :)

And a less intrusive question would be if your married, not if your single.

Asking if your single is more of a pickup lime for the club, but that could be up to local customs.