Which MouseEvent method can be used to determine if the Alt key is pressed?

Answer the following statements true (T) or false (F)

1) When a program creates a derived-class object, the object constructor is the last constructor called and the first whose body finishes executing. 2) If a base class constructor is overridden, the original constructor can no longer be called explicitly by the derived class. 3) When a base class method is overridden in a derived class, it is common to have the derived class version call the base class version and do some additional work. 4) Inheritance preserves the integrity of a base class.

What are the Guidelines for creating master files or database ?

What will be an ideal response?