📚 Data Structure – Complete Notes | ComputerGS
🔷 What is Data Structure?
A Data Structure is a way of organizing, storing, and managing data so that it can be accessed and modified efficiently.
👉 It helps in improving performance and reducing complexity in programs.
🔷 Definition
👉 “Data Structure is a systematic way of organizing data in memory to perform operations efficiently.”
🔷 Types of Data Structure
1. Linear Data Structure
👉 Elements are arranged sequentially (one after another)
✔ Examples:
Array
Linked List
Stack
Queue
2. Non-Linear Data Structure
👉 Elements are arranged hierarchically or interconnected
✔ Examples:
Tree
Graph
🔷 Basic Data Structures
1. Array
👉 Collection of elements stored at contiguous memory locations
✔ Features:
Fixed size
Fast access using index
2. Linked List
👉 Collection of nodes where each node contains data + pointer
✔ Types:
Singly Linked List
Doubly Linked List
Circular Linked List
3. Stack (LIFO)
👉 Last In First Out principle
✔ Operations:
Push (Insert)
Pop (Delete)
📌 Example: Plate stack
4. Queue (FIFO)
👉 First In First Out principle
✔ Operations:
Enqueue (Insert)
Dequeue (Delete)
📌 Example: Line at ticket counter
5. Tree
👉 Hierarchical structure with root and child nodes
✔ Types:
Binary Tree
Binary Search Tree
6. Graph
👉 Collection of vertices (nodes) and edges
✔ Used in networks, maps, social media
🔷 Operations on Data Structure
✔ Insertion
✔ Deletion
✔ Traversal
✔ Searching
✔ Sorting
🔷 Classification (Simple View)
| Type | Structure Style | Examples |
|---|---|---|
| Linear | Sequential | Array, Stack, Queue |
| Non-Linear | Hierarchical | Tree, Graph |
🔷 Advantages of Data Structures
✔ Efficient data management
✔ Faster processing
✔ Better memory utilization
✔ Helps in algorithm design
🔷 Disadvantages
❌ Complex implementation
❌ Requires more memory (sometimes)
❌ Needs good understanding
🔷 Applications
✔ Database Management Systems (DBMS)
✔ Operating Systems
✔ Artificial Intelligence
✔ Networking
✔ Compiler Design
🔷 Important Exam Points
⭐ Data structure organizes data efficiently
⭐ Stack follows LIFO, Queue follows FIFO
⭐ Array uses contiguous memory
⭐ Tree & Graph are non-linear structures
⭐ Linked List uses pointers
No comments:
Post a Comment