WEB ML

assignment 1

Assignment 1
Sub:Web Engg
Year:Third

1. What are the different categories of web application?

2. Explain the characteristic of web application?

3. Where do requirements come from?Explain Requirement engg specifies in web engg?

4. What are the various principle of Requirement Engg?

5. Which type of requirement are important for web application?

6. How the requirement for web application is listed and documented?

7. Explain modeling specifies in web engg?

8. Explain various modeling requirements?

last date of submission:friday 18 sep 09

• STEP 1: Set Your Goals
  1. Why do you want a web site?
  The first step is to identify the reasons for creating a website and how it will fit into your overall goals.
  You need to identify your strengths and opportunities, and how they tie with your plan of creating a web site.
  You also need to look into the threats and weaknesses that can adversely affect your plans and derail your goals.
  2. How does a web site fit your overall business plan?
• What will a website do for you and your business?
• A website may be your meal ticket and the main income source; or it may be for additional income. If you have an existing business, it can be used as a marketing tool, additional revenue source, or a springboard of an entirely different business model.
• Some of the key questions you need to ask include:
  Do you want to earn money directly from your website? Is it supposed to be profitable?
  Is your website simply for marketing purposes, with no direct revenue generation objectives?
  Will your website be used solely for customer and/or technical support?
  Is your website part of a multi-channel strategy (e.g. you run a brick and mortar store or a catalog together with a website)? Or is it a single channel strategy (e.g. you are an Internet pure play business)?
  Or will your website be an information source?

7 Steps to Successful Web Site Development

STEP 1: Set Your Goals
STEP 2: Develop Your Web Site Strategy
STEP 3: Set-Up Implementation Plans
STEP 4: Start the Ball Rolling
STEP 5: Create and Launch Your Web Site
STEP 6: Promote Your Web Site and Measure Its Results
STEP 7: Maintain Your Website and Grow Your Web Business

Unified Modeling Language

The heart of object-oriented problem solving is the construction of a model. The model abstracts the essential details of the underlying problem from its usually complicated real world. Several modeling tools are wrapped under the heading of the UML™, which stands for Unified Modeling Language™. The purpose of this course is to present important highlights of the UML.
At the center of the UML are its nine kinds of modeling diagrams, which we describe here.
Use case diagrams Extra info
Class diagrams Extra info
Object diagrams
Sequence diagrams Extra info
Collaboration diagrams
Statechart diagrams Extra info
Activity diagrams
Component diagrams
Deployment diagrams

Structure of IAS

Structure of IAS

The control unit fetches 2 instruction at a time but execute only 1 instruction at a time.

Memory Buffer Register (MBR): It stores word to be written in memory or receive a word from memory.
Memory Address Register (MAR): It specifies address of memory location for data transfer
Instruction Register (IR) : It stores 8 bit opcode of the instruction getting currently executed
Instruction Buffer Register(IBR) : It holds temporarily the right instruction fetch from an instruction word in memory
Program Counter (PC): It contain address of the next instruction pair to be fetched from memory.
Accumulator(AC) & Multiplier Quotient(MQ): They hold operands and result of ALU Operations. e.g Multiplying two 40 bit numbers give 80 bit result. Higher 40 bit are stored in AC and lower 40 bit are stored in MQ.

Von Neumann

The task of entering and altering programs for the ENIAC was extremely tedious.

The programming process could be facilitated if the program could be represented in a form suitable for storing in memory alongside the data.

Then, a computer could get its instructions by reading them from memory, and a program could be set of altered by setting the values of a portion of memory.
This idea, known as the Stored-program concept, is usually attributed to the ENIAC designers, most notably the mathematician John von Neumann, who was a consultant on the ENIAC project.

In 1946, von Neumann and his colleagues began the design of a new stored-program computer, referred to as the IAS computer, at the Princeton Institute for Advanced Studies.

The IAS computer, although not completed until 1952, is the prototype of all subsequent general-purpose computers.

Figure shows the general structure of the IAS computer.

It consists of:
A main memory, which stores both data and instructions.
An arithmetic-logical unit (ALU) capable of operating on binary data.
A control unit, which interprets the instructions in memory and causes them to be executed.
Input and output (I/O) equipment operated by the control unit.