National Instruments Software Engineer interview questions

1st round : Written test ( Programming concepts , analytical problem solving) 2nd round : Programming skills 3rd round : Technical and behavioral interview 1st round had 9 questions . Time : 75 minutes Few questions had parts a and b. Initially we had pre-placement talk in which they told about their company, packages and all....Then was the 1st round......... Results of shortlisted candidates not yet announced :(