Correct Answer : boolean
Explanation : SQL Server doesn’t have a Boolean data type, at least not by that name. To store True/False, Yes/No, and On/Off values, use the bit data type. It accepts only three values: 0, 1, and NULL.
Correct Answer : Master
Explanation : The master database records all of the system level information for a SQL Server system.
Correct Answer : Model
Explanation : When a CREATE DATABASE statement is issued, the first part of the database is created by copying in the contents of the model database.
Correct Answer : Msdb
Explanation : The msdb database is used by SQL Server Agent for scheduling alerts and jobs, and recording operators.