I applied at the IBM website, and the whole process from application to job offer took 5 months.

Initially, the recruiter contacted me quickly, within 2 weeks.

I was asked to fill out a questionnaire related to the job. I didn't hear from them for months thereafter.

I applied for a similar position after several months and was contacted by the recruiter.

About a month later, I phone interviewed with 2 managers. Then I received the offer after a week.

It was a lengthy, disorganized process.

Questions were mostly behavioral, like "How did you handle this [scenario]?"

If you are experienced, these types of questions are easy to answer because you have gone through them in real life. For example, how do you handle a difficult client manager?