What can replace the if...else statement?

Can the same import package/class be called multiple times in Java?

What is the file extension of compiled Java classes?

IS-A relationship in java is related to

Elements in an array are accessed _____.

Which class is the superclass of all event classes in Java?

  All arrays contain an attribute-length which contains the number of elements stored in the array 

The type <class-name> not necessarily be an abstract class to define abstract methods.

True or False?

What will be the value of str after following lines of code?

StringBuffer str = new StringBuffer("Hello");
s.deleteCharAt(0);

Which of these methods can be used to convert a String into a character array?