A suit's probably not 100% necessary but I would go with a nice shirt and a tie, good slacks, hard-soled shoes.
Possibly too glib re the answer but it can be easily turned into a positive, e. g. you want to make it so that customers don't have to call you.
Worst interview questions? I agree re "Where do you see yourself in five years?
" Christ, I never know, and I have not held too many jobs that lasted for that long (sad, but true), so the honest answer is - "Somewhere else." But that doesn't go over well. I usually say something to the effect that "it's hard to tell because tech changes so fast and new job titles come up all the time, but I hope to be using my skills and expertise to their fullest extent."
I'm also not a fan of "Why do you want to work for us?
" "Because you have openings, you're in the area, the job is in my wheelhouse and I will be paid a decent wage." Sorry, but I am not much of a kiss-up re companies. There are very few companies where I walk in there and think, "Wow, how awesome it would be to work here!"
My best interview story is when I'm asked about an accomplishment I'm proud of. I have a doozy and it also works because I can get big laughs with it. My story -
I have worked for X Company on three separate occasions. On the second, I went into the Y Department. And I was there for all of two hours when I hear this woman swearing in the next cube. Loudly, too, and with a Malden accent.
So I go over there, and I introduce myself. And I ask what the problem is. Well, she is swearing about a report that my department produces. I ask her to explain to me why it's a problem, and how she uses it. She explains.
It's a monthly report, and she needs to compare last month to the one just before it. So she is printing the two reports, taping them together and then, using a highlighter and a ruler, she is going line by line. "This matches, this doesn't. This matches, this doesn't." It takes her three weeks to do this. For a monthly report, this is utterly unacceptable.
I agree with her. No one has asked me to take this on; I just do it. What the heck! I'm a new employee. I ask for a license for Microsoft Access, and I explain the situation. It is purchased for me.
It takes me about three months to get it all together. I put together an Access database with - no lie - 56 queries. These include things like getting the program to match "Sr." and "Senior", as the report does not use uniform job titles. I finish working on it and test it, and this report, which originally took three months to process now takes -- drumroll please -- three hours.
The swearing woman from Malden is gracious and lovely and nominates me for a company award, which I win. And that's how I won a company award.