Showing posts with label .Net Study Material. Show all posts
Showing posts with label .Net Study Material. Show all posts

Tuesday, September 29, 2015

Free Programming Books

There was thread on Stackoverflow which contribute the list of free programming books. The Original Source for these free books as below:
 List of freely available programming books
Further I found a nice maintained list on GitHub – Free programming books and subset of the list is here:

Parallel Programming
Partial Evaluation
Professional Development
Programming Paradigms
Regular Expressions
Reverse Engineering
Security
Software Architecture
Standards
Theoretical Computer Science
Web Performance
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Thursday, January 13, 2011

Class 1 - Application System & DNA Architecture

What is Application System???
System: it is combination of functional units.
Function Units: These are the necessary components for a operation which effect the target/goal.
For example:  Computer System
It has four functional units if anyone fails then system fails to achieve the goal.

Application System Functional Components
PL - Presentation Layer
BL – Business Layer/ Business Logic
DL – Data Link Layer
Presentation Layer:
User Interface called Presentation Layer. It is interface between Technical Person (Programmer)
and the Non-technical Person (User).
Technical Person tell the non technical person that how to work through their created User Interface.
If it is not correct then application is not successful.
It could be either windows forms or web forms in case of .Net.



Business Logic:

It deals in Software Development Cycle. It processes in various types of software development cycles
like water fall models etc..
Implementing business process called Business Logic.
Various types of logic available like here like:
Business Logic, Virtual Logic, Presentation Logic 

Data Link Layer:

This deals with backend databases to store the information.
This layer determined as the interaction b/w front end and back-end.
Fig 3
What is the Consumer Need?
In Current time consumer needs multiuser application. To achieve this here is few application architectures available.
That Uses DNA Architecture:
DNA (Distributed Network Architecture)
1.      1-tier
2.      2-tier
3.      3-tier
4.      N-tier

1-tier Architecture

fig 4
















It is also called Monolithic approach. It has achieved DNA but demerit is that expansion is harmful in future for mainframe.
UNIX posses 1-tier architecture.

2-tier Architecture


Work Load is distributed in two layers. It is also called FAT Server if it is distributed as:
                                                                              
What is workload???

Max Number of instructions executed per unit time period on machine.

3-tier Architecture

It this workload is divided in layers as:

N-tier Architecture
 




Each Department has their own Business logic so they are divided in sub layer as in ERP System for company.
You cannot implement all departments BL at one site. So you have to divide it in sub layers.
This is N- tier arch. In which you can divided it in n number of sub layers according to the need.
Microsoft developed COM (Common/ Communication Object Model) for N- tier architecture.
 COM is for making communication between same type of technologies e.g. Microsoft to Microsoft.



COM














For different type of technologies here is DCOM

DCOM

It is all about DNA Architecture in Software Development.
 

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Wednesday, January 12, 2011

Class 2 - Visual Basic Vs .Net

Demerits of Visual Basic against .Net

Object Based Language

                It is, Even we can create classed in VB but we cannot implement Inheritance and polymorphism in it.

Development and Deployment:
Development is easy in VB but deployment is hard. It is done by MTS ( Microsoft  Transition Server) .
DLL Hell:
                 DLL (Dynamic Link Library)... You cannot run two versions of same product. E.g. Ms Office 97 and ms office 2000. Not possible to work with both of these versions at the same time.
CLI (Cross Language Interpretation):
                Conversion of VB -> Java is not possible but in .net you can translate C# to VB , VB to C# etc.
Platform Dependent:
                You can run VB programs on windows operating System only and it is physical dependent also.
Comparison of problems in VB , Java and .Net that VB have.
VB ( Problems exists )
Java
.Net
Object Based
No – it is OOPS
   NO
Development & Deployment
Yes  - it have
   NO
DLL Hell Problem
Yes – it have
   NO
Cross -Language Interpretation
 No- possible using CORBA
   NO
Platform Dependent
NO-  using JVM
   NO
.NET have MONO framework that removes its 5th Problem. .Net is much advance and good as like java. New Version of .Net will support about 100 languages.
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