Java has six relational operators in that two are also called as equality operators.

Relational operators always result in a integer value.

The + operator in JAVA can't be overloaded.

Collection and Collections refer to same type of interface

For any reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true

The only type that a switch can evaluate is the primitive int

Below expression is valid While(int x==2)

equal() method is used to compare the primitive variables

Reference variables are immutable while String objects are not

Contrustor can have any return type

If method is not inherited then it is not possible to override it

Constructor can be overloaded

Argument List of overriding method can be different

Overriding method can change the return type regardless of overridden method.

The access level for overriding method can be less restrictive than the overridden method.

The method which is marked as static can not be overridden.

The method which is marked as final can be overridden.

The overriding method cant have a more restrictive access modifier than the method being overridden.

A catch can have comma separated multiple arguments

All methods in an abstract class must be declared abstract