Recently, many candidates search NS0-159 exam guides online. As we all know that NS0-158 exam is retired on Apr.30, 2018. NS0-159 is the upgrade exam of NS0-158. So you can only register NS0-159 exam for NCDA certification at Pearson VUE testing center now. NS0-159 exam information: There are 60 questions in real NCDA certification NS0-159