Core Concepts in Data Structures and Algorithms
Queue Implementation with Linked Lists
A queue is implemented using a linked list by maintaining two pointers:
Key Pointers
- Front: Points to the front node of the queue.
- Rear: Points to the last node.
Operations
- Enqueue (Insertion): Create a new node, link it at the end, and update the rear pointer.
- Dequeue (Deletion): Remove the front node and update the front pointer.
Advantages
- Dynamic size, no overflow unless memory is full.
General Tree to Binary Tree Conversion
Conversion Steps
- Left-Child Right-Sibling
C Programming Essentials: Operators, Functions, and Core Concepts
C Operators Explained
Working of Increment and Decrement Operators
The increment (++) and decrement (--) operators are unary operators used to increase or decrease the value of a variable by one. They can be used in two forms: prefix and postfix.
Program Example:
#include <stdio.h>
int main() {
int a = 10;
printf("%d\n", a++); // Prints 10 (postfix increment: 'a' is used, then incremented to 11)
printf("%d\n", a--); // Prints 11 (postfix decrement: 'a' is used, then decremented to Operating System Memory & Deadlock Concepts Explained
Operating System Memory Management
Key Memory Management Concepts
Memory Management: How the OS handles allocation, tracking, and protection of memory used by processes.
Memory Abstraction: A way for the OS to give each process its own view of memory, isolating them and enabling multitasking.
Base Register: Stores the starting physical address of a process’s memory.
Limit Register: Specifies the range (size) of memory a process can access from its base.
Swapping: The act of moving processes in and out
Read MoreOperating System and File System Fundamentals Explained
Operating System and File System Fundamentals
Device Installation Without OS Recompilation
Modern operating systems use Loadable Kernel Modules (LKMs), which allow device drivers to be loaded at runtime without recompiling the kernel. Additionally, they use Plug-and-Play (PnP) systems and Hardware Abstraction Layers (HAL) to detect and configure new devices automatically. This makes it easy to add printers, USB drives, and other hardware dynamically.
Why Printer Output is Spooled to Disk
Printing is
Read MoreKey Concepts in Enterprise Software Development
Enterprise Software Fundamentals
Identifying Enterprise Software
Select all the following that would likely be considered enterprise software:
- B2B Portal
- Human Resource Management (HRM)
- Legal Document Management
- B2C Portal
- Accounts Receivables
- Order Processing
Agile Methodologies: Scrum
Key Characteristics of Scrum
Select all the statements that best describe Scrum:
- Small, prioritized deliverables
- Cross-functional, self-organized teams
Values Encouraged by Scrum
Select all the values Scrum encourages:
- Open communication
- Frequent
Web Dev Fundamentals: REST, JSON, MongoDB, React, Redux
REST API and HTTP Methods
REST API (Representational State Transfer API)
A REST API is a set of web services that follow the principles of REST, which is an architectural style for distributed systems. REST APIs are commonly used for building web services that allow communication between clients and servers over HTTP.
Key principles of REST:
Stateless: Every request from a client to a server must contain all the information needed to understand and process the request. The server does not store any