When preparing for an exam, you should read textbooks covering the questions you encounter. In the same way, the Japanese Language Proficiency Test (JLPT) does the same thing. As such, if you want to write JLPT N5, there are a few textbooks that cover the curriculum of the exam and can help you perform well on it.
The Official Guide Book For JLPT N4 N5
A brief introduction
Since 2010, a new Japanese Language Proficiency Test has been implemented. The Japanese-Language Proficiency Test website now offers a summary version of the guidebook and an N4 N5 version of the Japanese-Language Proficiency Test. For example, there are listening comprehension questions on the pronunciation CD.