Core Subjects Handwritten Notes Combo DSA | DBMS | CN | OS | SQL


Introducing our “DSA, DBMS, CN, OS, SQL Handwritten Notes” – the ultimate companion for core subjects enthusiasts! Crafted by experts, these notes offer:

  • 📜 Handwritten charm for enhanced learning.
  • 🌐 Comprehensive coverage of web technologies.
  • 🎨 Visual aids for better understanding.
  • 🔗 Practical examples and real-world projects.
  • 🗂️ Logical organization for easy learning.
  • 📚 Timeless reference for future use.

Begin your web development journey with these portable, practical, and beautifully crafted notes.


Our Combo Core Subjects Handwritten Notes have been thoughtfully curated to cater to the needs of both ambitious students pursuing their computer science graduation and individuals preparing for career-defining placements. With a focus on clarity, relevance, and concise content, these notes are your ultimate companion in unraveling the intricacies of DSA, DBMS, CN, OS, SQL .

DSA Topics Covered:

  • DS Introduction
  • DS Algorithm
  • Asymptotic Analysis
  • DS Pointer
  • DS Structure
  • DS Array
  • Linked List
  • Types of Linked List
  • DS Stack
  • Array Implementation
  • Linked List Implementation
  • DS Queue
  • Types of Queues
  • Linked List Representation
  • Binary Tree
  • Binary Search Tree
  • etc….

DBMS Topics Covered:

  • Introduction to DBMS:-Understanding Databases and DBMS
    -Advantages of using a DBMS
    -Data Models: Hierarchical, Network, Relational, and more
  • Relational Database Concepts:-Tables, Rows, Columns
    -Keys: Primary, Foreign, Candidate, Super
    -Entity-Relationship (ER) Modeling
  • SQL (Structured Query Language):-SELECT, INSERT, UPDATE, DELETE statements
    -Filtering, Sorting, Aggregation
    -JOIN operations: INNER, OUTER, CROSS, SELF
  • Data Normalization:-First, Second, Third Normal Forms (1NF, 2NF, 3NF)
    -Eliminating Data Redundancy and Anomalies
  • Indexing and Performance Optimization:-Importance of Indexes
    -B-Tree, Hashing, Bitmap Indexing
    -Query Optimization Techniques
  • Transactions and Concurrency Control:-ACID Properties (Atomicity, Consistency, Isolation, Durability)
    -Transaction States: Active, Partially Committed, Committed, Aborted
  • Database Security:-Authentication and Authorization
    -Data Encryption and Access Control
  • Query Processing and Optimization:-Parsing, Validation, Translation, Execution
    -Cost-Based Query Optimization
  • Distributed Databases:-Replication vs. Fragmentation
    -Distributed Query Processing
  • NoSQL Databases:
    -Overview of NoSQL databases
    -Types: Document, Key-Value, Column-family, Graph

OS Topics Covered:

Chapter 1: Introduction to Operating System

  • Definition of an operating System
  • Functions and Goals of an Operating system
  • Evolution of Operating System
  • Types of Operating Systems

Chapter 2: Process Management

  • Process Concepts
  • Process Scheduling Algorithms
  • Interprocess communication and Synchronization
  • Deadlock and prevention mechanisms

Chapter 3: Memory Management

  • Memory Hierarchy
  • Virtual Memory Concepts
  • Paging and Segmentation
  • Memory Allocation and Deallocation
  • Page Replacement Algorithms

Chapter 4: File Systems and Storage Management

  • File Concepts and Operations
  • File System Implementation
  • Disk management and RAID
  • File System Security and Access Control

Chapter 5: Input/Output Systems

  • I/0 Devices and operations
  • I/O Buffering and caching
  • Disk scheduling Algorithms
  • I/O Device Handling and interrupts

Chapter 6: Process Synchronization and Deadlocks

  • Critical Section Problem
  • Semaphores and Mutexes
  • Deadlocks, Resource Allocation graph, Deadlock Prevention and Avoidance
  • Deadlock Detection and Recovery

Chapter 7: CPU Scheduling

  • CPU scheduling Goals.
  • Scheduling Algorithms
  • Thread Scheduling and Multicore Systems

Chapter 8: Security and Protection

  • Security threats and Attacks
  • Authentication and Authorization
  • Access control and Security Policies
  • Cryptography and Data Encryption

Chapter 9: Distributed Systems

    • Characteristics of distributed systems
    • Communication models
    • Distributed File Systems
    • Distributed Process Synchronization and Mutual Exclusion


CN Topics Covered:

Chapter 1: Introduction to Computer Network

Chapter 2: Physical Layer

Chapter 3: Data Link Layer

Chapter 4: Medium Access Sublayer

Chapter 5: Network Layer

Chapter 6: Transport Layer

Chapter 7: Application Layer

Chapter 8: Network Security


SQL Topics Covered:

Chapter 1: Introduction to Databases and SQL

  • Understanding Databases
  • What is SQL?
  • Relational Databases
  • The History of SQL
  • Setting Up SQL Environment

Chapter 2: SQL Basics

  • SQL Syntax
  • SELECT Statement
  • Filtering Data with WHERE
  • Sorting Data with ORDER BY
  • Filtering and Sorting Data Exercises

Chapter 3: Data Manipulation

  • INSERT, UPDATE, and DELETE Statements
  • Modifying Data
  • Transaction Management
  • Data Manipulation Exercises

Chapter 4: Retrieving Data with SQL

  • Retrieving Data from a Single Table
  • DISTINCT Keyword
  • Limiting Results with LIMIT
  • Retrieving Data from Multiple Tables (JOINs)
  • Retrieving Data Exercises

Chapter 5: Data Filtering and Sorting

  • The WHERE Clause
  • Logical Operators
  • Sorting Data with ORDER BY
  • Advanced Filtering and Sorting Exercises

Chapter 6: Aggregating Data

  • Aggregate Functions (COUNT, SUM, AVG, MAX, MIN)
  • GROUP BY Clause
  • HAVING Clause
  • Aggregating Data Exercises

Chapter 7: Subqueries

  • Subqueries in WHERE Clause
  • Subqueries in SELECT Clause
  • Correlated Subqueries
  • Subqueries Exercises

Chapter 8: Data Modification and Transactions

  • Transactions in SQL
  • Transaction Exercises

Chapter 9: Working with Dates and Times

  • Date and Time Data Types
  • Date and Time Functions
  • Date and Time Exercises

Chapter 10: String Manipulation

  • String Functions
  • Concatenation
  • String Manipulation Exercises

Chapter 11: Views and Indexes

  • Creating and Using Views
  • Indexes and Performance
  • View and Index Exercises

Chapter 12: Stored Procedures and Functions

    • Creating and Calling Stored Procedures
    • Creating and Calling User-Defined Functions
    • Stored Procedures and Functions Exercises

Key Features:

  • Immaculate Handwriting: Bid adieu to deciphering smudged or illegible notes. Our Java, Python, C, C++ Handwritten Notes showcase meticulously written content, ensuring that every concept is crystal clear and easy to understand.
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  • Seamless Placement Preparation: As you gear up for placement interviews, our notes provide you with the competitive edge. Ace technical rounds by confidently demonstrating your in-depth DSA, DBMS, CN, OS, SQL Core knowledge.
  • Entrance Exam Excellence: Crush entrance exams with ease. Our notes comprehensively cover DSA, DBMS, CN, OS, SQL all topics, empowering you to tackle challenging questions and secure admission to premier institutions.
  • Academic Brilliance: Whether you’re striving for top grades or seeking a profound understanding of web Development principles, our notes offer the clarity and depth necessary for academic excellence.
  • Interview Brilliance: Navigating technical interviews becomes smoother. Our comprehensive coverage equips you to confidently respond to interview queries and exhibit your expertise.
  • Holistic Learning: From foundational principles to advanced nuances, our notes offer a holistic learning journey, irrespective of your proficiency level.



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