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Q. ________ is used to uniquely identify the rows in table.

Q. Abstract classes and methods are when the parent class has a named method, but need its child class(es) to fill out the tasks.

Q. URL stands for ____________ .

Q. In PHP, we have the following loop types:

Q. Constant name are proceeded by _____ like a normal variable declaration.

Q. The _______ defines a standard way for accessing and manipulating HTML documents. It presents an HTML document as a tree-structure.

Q. In PHP, there are three types of arrays:

Q. The _____ method starts with two underscores (__).

Q. __________ function is used to change the default database for the connection.

Q. A class that is inherited from by another class. This is also called a ____