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Reference Book Computer Networks

OSI Model & TCP/IP Protocol Suite

Data Communications and Networking (5th Edition)

Author: Behrouz A. Forouzan

Best reference book for Computer Networks: OSI layers, Data Link control, IPv4/IPv6 Subnetting, and TCP/UDP protocols.

Exams: RPSC / State Programmer, HPSC PGT CS, KVS PGT / TGT, Computer Instructor

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Study Notes Data Structures & Algorithms

Trees (Binary Tree, BST, AVL, B-Tree)

Binary Trees, BST, AVL & B-Tree Formula Cheat Sheet for Competitive Exams

All direct formulas for leaf nodes, height of binary trees, number of unlabeled binary trees (Catalan Number), and Heap time complexities.

### 1. Essential Binary Tree Formulas
1. **Maximum nodes at level L** (root at level 0): `2^L`
2. **Maximum nodes in a Binary Tree of height H** (root at height 0): `2^(H+1) - 1`
3. **Relati...

Exams: HPSC PGT CS, KVS PGT / TGT, NVS PGT CS, Computer Instructor

Study Notes Operating System (OS)

Deadlocks & Banker's Algorithm

Deadlock Necessary Conditions, Avoidance & Banker's Algorithm Complete Notes

High-yield revision notes on Coffman's 4 conditions, Resource Allocation Graph (RAG), and Safe Sequence formula.

### 1. Four Necessary Conditions for Deadlock (Coffman Conditions)
A deadlock situation can arise if and only if the following four conditions hold simultaneously in a system:
1. **Mutual Ex...

Exams: HPSC PGT CS, KVS PGT / TGT, RPSC / State Programmer, Computer Instructor

Video Lecture Computer Networks

IPv4 Addressing, Subnetting & CIDR

IPv4 Subnetting, CIDR & VLSM Numericals Made Easy

Solve any subnet mask, host range, broadcast IP, and CIDR /26 /27 /28 question without binary conversion.

Exams: RPSC / State Programmer, HPSC PGT CS, Computer Instructor, DSSSB & State CET

YouTube

Video Lecture Operating System (OS)

Process Management & CPU Scheduling

Complete CPU Scheduling (FCFS, SJF, SRTF, Round Robin) with PYQs

Master all CPU Scheduling numericals for HPSC PGT, KVS, NVS & Programmer exams with shortcut Gantt chart tricks.

Exams: HPSC PGT CS, KVS PGT / TGT, NVS PGT CS, Computer Instructor

YouTube

Reference Book Digital Logic & COA

Boolean Algebra, K-Map & Logic Gates

Digital Design & Computer System Architecture

Author: M. Morris Mano

Standard reference for Boolean Algebra, K-Map, Flip-Flops, Register Transfer, Addressing Modes, and Cache Organization.

Exams: HPSC PGT CS, KVS PGT / TGT, Computer Instructor, DSSSB & State CET

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