1Z0-032單項選擇題每日一練(2019.01.19)

Oracle Net Services is composed of several communication layers， known as a stack，which enables clients and database severs to share，modify，and manipulate data. Which reveals the correct architecture，in hierarchical order，of the client-side stack？（）

You created a database by using the Database Configuration Assistant. What must you do to access a user account in the sample schemas？（）