MCA1040- SYSTEM ANALYSIS AND DESIGN

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ASSIGNMENT

PROGRAM	MCA(REVISED FALL 2012)
SEMESTER	FIRST
SUBJECT CODE & NAME	MCA1040- SYSTEM ANALYSIS AND DESIGN
CREDIT	4
BK ID	B1647
MAX.MARKS	60

Note: Answer all questions. Kindly note that answers for 10 marks questions should be approximately of 400 words. Each question is followed by evaluation scheme.

1 Differentiate between Distributed Systems and Real-time Systems.

Answer : A distributed real-time system composes two challenging sets of properties which are imposed by the problem domain or the solution domain (or both.)

Distributed

A distributed system links a number of independent computing entities with local properties by way of a communication mechanism. As a consequence, algorithms and other design components must take into consideration the synchrony and the

2 What do you mean by system’s state of equilibrium? Also illustrate the process of stabilizing system.

Answer:- Equilibrium and Stability

To understand feedback processes it is important to understand the concepts of equilibrium and stability. Negative feedback loops are linked to stable equilibrium states and positive feedback loops are linked to unstable equilibrium. The stability of a system is intimately connected to its equilibrium state. If a system in equilibrium is disturbed slightly, then if it is stable it tends to return to or oscillate about its original equilibrium state. An unstable

3 What is structured design? Illustrate the process of modularisation. Also discuss modular design technique.

Answer: Structured Design is one of the methods used to define the system that is going to be live in future. This is used to analyze the working of the system, the different modules(functional units of the system), interactions between them and the type of data they are using or sharing to perform their various tasks correctly. All this can be represented by the use of special type of diagrams, known as Structured Chart. A structured chart consists of 3

Q.4 Write short notes on:

a. Data Dictionary

Answer:- Data Dictionary:- A data dictionary, or metadata repository, as defined in the IBM Dictionary of Computing, is a "centralized repository of information about data such as meaning, relationships to other data, origin, usage, and format."[1] The term can have one of several closely related meanings pertaining to databases and database management systems (DBMS):

b. Data Element

Data Element:-Data elements usage can be discovered by inspection of software applications or application data files through a process of manual or automated Application Discovery and Understanding. Once data elements are discovered they can be registered in a metadata registry.

In telecommunication, the term data element has the following components:

·         A named unit of data that, in

·          

c. Data Structure

Data Structure: - In computer science, a data structure is a particular way of organizing data in a computer so that it can be used efficiently.

Different kinds of data structures are suited to different kinds of applications, and some are highly specialized to specific tasks. For example, B-trees are particularly well-suited for implementation of databases, while compiler

d. Data Store

Data Store: - A data store is a data repository of a set of integrated objects. These objects are modeled using classes defined in database schemas.[1] Data store includes not only data repositories like databases, it is a more general

e. Data Flow

Data Flow: - Dataflow is a software architecture based on the idea that changing the value of a variable should automatically force recalculation of the values of variables which depend on its value.

Dataflow embodies these principles, with spreadsheets perhaps the most widespread embodiment of dataflow. For example, in a spreadsheet you can specify a cell formula which depends on other cells; then when any of those cells is

Q. 5 What are the different types of methods used for the training of operators and users? Discuss.

Answer:- Training is a set of a systematic processes designed to meet learning objectives related to trainees' current or future jobs. These processes can be grouped into the following phases; needs analysis, design, development, implementation, and evaluation. The phases are sequential, with the outputs of the previous phases providing the inputs to those that follow. Figure 1 depicts the phases and their relationships. Training delivery methods consist of the techniques and materials used by trainers to structure learning experiences. Different

Q6 Explain the concept of inheritance and polymorphism with example.

Answer:- Inheritance.:-Inheritance concept in OOP allows us to create a new class using an existing one. It also allows the new class to add its own functionality. This concept can also be related to real world entity. A bike manufacturer uses same mechanism of existing version of the bike while launching a new version with some added functionalities. This allows him to save time and efforts. In object-oriented programming (OOP), inheritance is when an

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