This site is the official site for Japanese-Language Proficiency Test (JLPT). You can access some of the questions here. Sample questions show the form of test items on the JLPT. Sample questions are organized by level, from N1 to N5. One sample question is offered for each test item type. There may be differences from questions in the actual test booklet.
http://www.jlpt.jp/e/samples/forlearners.html