Which one of the following function returns the port number of a specified service?

Which one of the following function is used to retrieve the MX records for the domain specified by hostname?

Which one of the following function is used to return an array consisting of various DNS resource records pertinent to a specific domain?

Which one of the following function checks for the existence of DNS records?

In mail($param2, $param2, $param3, $param4), the $param2 contains:

Study following steps and determine the correct order

(1) Open a connection to MySql server

(2) Execute the SQL query

(3) Fetch the data from query

(4) Select database

(5) Close Connection

Which of the following is a PHP resource?

Which of the following are useful for method overloading?

What will be the output of the following code?

echo 30*5 . 7;

How would you store order number (34) in an 'OrderCookie'?