Agile Principles and Lean Software Development Practices
12 Agile Principles
1. Planning Game
Customer + team decide scope → ensures relevant features
2. Small Releases
Frequent delivery → early feedback → fewer defects
3. System Metaphor
Simple shared vision → better understanding
4. Simple Design
Avoid overengineering → fewer bugs
5. Testing (TDD)
Write tests first → high reliability
6. Refactoring
Improve code continuously → maintainability
7. Pair Programming
Two developers → fewer errors, better quality
8. Collective Ownership
Anyone can improve
Read MoreUML Modeling Techniques for POS and ATM Systems
Conceptual and Domain Modeling
Question 1: What is a Conceptual Model/Domain Model? Explain the step-by-step process to build it with a complete example from a POS system.
Answer:
Conceptual/Domain Model
A Conceptual Model is a visual representation of the real-world problem domain showing the key concepts (classes), their attributes, and relationships without considering system implementation.
Steps to Build a Conceptual Model
- Identify Nouns and Verbs from Requirements: Extract potential classes and
Binary Tree Operations, Sorting Algorithms & CLL Pseudocode
Binary Tree Insert
1. ptr = ROOT; flag = FALSE
2. While (ptr != NULL) and (flag == FALSE) do
3. Case: ITEM < ptr->DATA
4. ptr1 = ptr
5. ptr = ptr->LCHILD
6. Case: ITEM > ptr->DATA
7. ptr1 = ptr
8. ptr = ptr->RCHILD
9. Case: ptr->DATA = ITEM
10. flag = TRUE
11. Print "ITEM already exists"
12. Exit
13. EndCase
14. EndWhile
15. If (ptr == NULL) then
16. new = GetNode(NODE)
17. new->DATA = ITEM
18. new->LCHILD = NULL
19. new->RCHILD C Programs: Tower of Hanoi and Singly Linked List
C Programs: Tower of Hanoi and Singly Linked List
Includes: Two C programs: a recursive Tower of Hanoi solver and a singly linked list implementation with stack demo. The original code has been preserved, formatted, and corrected for spelling, grammar, and readability.
Tower of Hanoi – C Program
#include <stdio.h>
void tower_hanoi(int n, char src, char dest, char temp) {
if (n == 1) {
printf("\nMove disk %d from peg %c to peg %c", n, src, dest);
return;
}
tower_hanoi(UML and System Modeling Techniques for Software Design
Chapter 5: System Modeling Fundamentals
System Modeling
- System modeling is the process of developing abstract models of a system, with each model presenting a different view or perspective of that system.
- System modeling has now come to mean representing a system using some kind of graphical notation, which is now almost always based on notations in the Unified Modeling Language (UML).
- System modeling helps the analyst to understand the functionality of the system, and models are used to communicate
C Implementation: Circular Linked List for Polynomials
C Implementation: 3D Polynomials with Circular Linked Lists
This code defines structures and functions to manage multivariate polynomials (in terms of $x, y, z$) using a circular linked list to store individual terms.
Data Structure Definition
struct node {
int coeff;
int x_exp, y_exp, z_exp;
struct node *next;
};A pointer to the first term is initialized:
struct node *poly1 = NULL;Term Insertion Function
insertTerm Function
Inserts a new term into the circular linked list. If the list is
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