Which of the following is the correct way to check whether the cookie is set or not before retrieving the value from "LoginCookie"?

Which is introduced in PHP5?

Which is correct with regard to indexes in MySql?

Which can be used to implement data validation while creating a table in MySql?

Output of the following code? $var1='a'; $$var1='b'; echo '$var1 $a';

Which help to keep an eye on the existing number of objects of a given class without introducing a non-class member variable?

Which of the following Linux command outputs the processor architecture ?

Which of the following command can be used to shutdown an already running MySQL server?

Who clears a session files on server?

Which of the following is not a VALID MySQL datatype?

What will happen if AUTO INCREMENT field reaches its maximum value?