Multivision interview questions

First the recruiter called me, told me something about the process, scheduled a phone interview with me, and sent me a guide for the preparation. Then the interviewer called. It was a very easy technical interview that lasted about 15 minutes. The interviewer asked me to introduce some of the projects listed on my resume. Then asked me some technical questions such as how do you test if a string is valid in date format, why to use classes for oop. The interview ended right there. And I received the offer letter the second day. However I declined it because you have to commit 24 months of employment.

This was a technical telephone interview. Company sent me a PDF document to study before the interview. They then called me at the appointed time and asked me a bunch of questions. The questions were only peripherally related to the study guide they sent, which I found surprising. The interview did not last very log(less than 15 minutes). I got the feeling that the interviewer wanted very specific answers. Also the questions were mostly semantic in nature, and didn't capture any of the finer points of the Software Development process.