Check this Microsoft Aptitude Mock Series and Online Placement Papers. The aptitude section in Placement Paper consists of questions on data sufficiency and puzzles. Solve in each question keeping in mind that you are interviewing for becoming a part of the World's Biggest Tech Firm.
Take this Microsoft Technical Mock Series and Online Placement Papers and to clear the toughest exam of Microsoft Placement Exam that is Technical Examination, you need to solve the questions only through proper logic. Practice here to increase speed and accuracy.