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Programming Concepts Beginner

What is Linked List?

A linear data structure where elements are stored in nodes, each containing data and a pointer to the next node in the sequence.

Linked lists provide O(1) insertion and deletion at known positions (no shifting needed), but O(n) access by index (must traverse from head). Types include singly linked (forward pointers), doubly linked (forward and backward), and circular.

Use cases include implementing stacks, queues, and hash table collision chains. In practice, arrays/vectors are often faster due to cache locality. Linked lists are fundamental to understanding pointers, memory allocation, and data structure design.

Related Terms

Event-Driven Architecture
A software design pattern where components communicate by producing and consuming events rather than direct method calls.
Unit Testing
Testing individual components or functions of a program in isolation to verify they work correctly.
Closure
A function that captures and retains access to variables from its enclosing scope, even after that scope has finished executing.
Queue
A data structure that follows First-In-First-Out (FIFO) ordering, where elements are added at the rear and removed from the front.
Observer Pattern
A design pattern where an object (subject) maintains a list of dependents (observers) that are notified automatically of state changes.
Singleton Pattern
A design pattern that restricts a class to a single instance and provides a global point of access to that instance.
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