What is a null object in c++, Computer Engineering

Assignment Help:

It is an object of a number of classes whose purpose is to indicate that a real object of that class does not exist. One common use for a null object is a return value from a member function that is supposed to return an object with some specified properties but cannot search such an object.

 

 


Related Discussions:- What is a null object in c++

Define wilkes control unit, Q. Define Wilkes Control Unit? Prof. M. V. ...

Q. Define Wilkes Control Unit? Prof. M. V. Wilkes of the Cambridge University Mathematical Laboratory invented the term microprogramming in 1951. He offered a systematic altern

Algorithm and pseudocodes, develop an algorithm using pseudocode for comput...

develop an algorithm using pseudocode for computing cos(x) and sin(x). use a sentinel controlled while loop. use the series definition of e^+-jx

Accessing a cache - computer architecture, Accessing a Cache:  Direct ...

Accessing a Cache:  Direct mapping: (Block address) modulo (Number of cache block in the cache) The valid bit indicate whether an entry contain a valid address.

Message passing programme development environment, In a multicomputer syste...

In a multicomputer system the computational load amid different processors should be balanced.  To pass information between different nodes message passing technique is used. The p

Describe in brief the history of e-commerce, Describe in brief the history ...

Describe in brief the history of E-Commerce.  History of E-commerce. E-commerce started before personal computers were prevalent and has grown into a multi-billion d

Minimis logic function using K-map, Minimise the logic function F (A, B, C,...

Minimise the logic function F (A, B, C, D) = Π M (1, 2, 3, 8, 9, 10, 11,14) ⋅ d (7, 15) Use Karnaugh map.   Ans. Given function F=∏M(1,2,3,8,9,10,11,14).d(7, 15) F'=B'D+B'C+AC+AB'

Find 10s complement for decimal number, Q. Find 10's complement for decimal...

Q. Find 10's complement for decimal number? Adding 1 in 9's complement produces 10's complement. 10's complement of 0256 = 9743+1 = 9744. Please note on adding the number in

What is the chief advantage of using virtual packets, What is the chief adv...

What is the chief advantage of using virtual packets instead of frames? The router can't transfer a copy of a frame from one kind of network to another since the frame formats

What are the advantages of electronic payment system, What are the advantag...

What are the advantages of electronic payment system? Advantages of the electronic payment system are illustrated below: This gives good security schemes. Four important sec

Recent parallel programming models, A model for parallel programming is an ...

A model for parallel programming is an abstraction and is machine architecture independent. A model can be executed on several hardware and memory architectures. There are various

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd