Answer / jasbir singh

An abstract class is a class with at least one function
without definitions.

An Interface is a class which only contains function
declarations, all the functions are specifically and
separately defined later. And you can't create objects of
these classes.

Answer / poorna chandar rao

diffrence bettwen the abstract class and interfaces

abstract class is having abstarct methods and concrete
methods abstarct class as compulosry having subclass for the
implementation abstarct methods and abstarct does not
support multiple inheritence
because one subclass extend the abstract class their is no
scope for extends for another class because it is not
support for the multiple inheritence
ex 1: abstract class one
2 class two extends one extend three (not valid)

but interface having only method signature in the interface
their is concrete method and it supports the multiple
inhirtence because

ex: interface one
class two implements one extends three(valid)
onc class implemens the interface and extends to another
class that is support the multiple inhertince

Answer / pankaj kumar upadhyay

abstract class contain an abstract function as well asather functions and variableand it must be defind in derived class and here we no create an object,
ex:
an SBI bank which follow the RBI Rules including it own rules.
while an interface class can contain only an abstract function, not any other functions or variables butit also must be defined in derive class .here also we dont create ao object.
ex:
an RBI follow only itself rules

Objective The objective of this problem is to test the understanding of Object-Oriented Programming (OOP) concepts, in particular, on encapsulation. Problem Description Create a program for managing customer’s bank accounts. A bank customer can do the following operations: 1. Create a new bank account with an initial balance. 2. Deposit money into his/her account. 3. Withdraw money from his/her account. For this operation, you need to output “Transaction successful” if the intended amount of money can be withdrawn, otherwise output “Transaction unsuccessful” and no money will be withdrawn from his/her account. Input The input contains several operations and is terminated by “0”. The operations will be “Create name amount”, “Deposit name amount”, or “Withdraw name amount”, where name is the customer’s name and amount is an integer indicating the amount of money. There will be at most 100 bank accounts and they are all created on the first month when the bank is opening. You may assume that all account holders have unique names and the names consist of only a single word. Output The output contains the transaction result of withdrawal operations and the final balance of all customers after some withdrawal and deposit operations (same order as the input). Sample Input Create Billy 2500 Create Charlie 1000 Create John 100 Withdraw Charlie 500 Deposit John 899 Withdraw Charlie 1000 0

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