Float number: 5.5

Integer number: 5 and float number: 5.5

5a. Exceptions in Java

An exception is an unwanted or unexpected event, which occurs during the execution of a program i.e
at run time, that disrupts the normal flow of the program’s instructions.

Error: An Error indicates serious problem that a reasonable application should not try to catch.
Exception: Exception indicates conditions that a reasonable application might try to catch.
Exception Hierarchy

All exception and errors types are sub classes of class Throwable, which is base class of
hierarchy.One branch is headed by Exception. This class is used for exceptional conditions that user
programs should catch. NullPointerException is an example of such வா exception.Another

branch,Error are used by the Java run-time system(J VM) to indicate errors having to do with the run-
time environment itself(JRE). StackOverflowError is an example of such an error.

Throwable

Checked Exceptions
Example: 10 or Compile

Virtual Machine Error

time Exception

Unchecked Exceptions
Example: Runtime or Null Assertion Error etc

Pointer Exceptions

5b. Virtual Function in C++

A virtual function a member function which is declared within base class and is re-defined (Overriden)
by derived class.When you refer to a derived class object using a pointer or a reference to the base
class, you can call a virtual function for that object and execute the derived class’s version of the
function.

« Virtual functions ensure that the correct function is called for an object, regardless of the type of
reference (or pointer) used for function call.