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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

Observer Pattern
A design pattern where an object (subject) maintains a list of dependents (observers) that are notified automatically of state changes.
Stack vs Heap
Two memory regions: the stack stores function call data with automatic cleanup, while the heap stores dynamically allocated objects.
API Design
The practice of designing application programming interfaces that are consistent, intuitive, and maintainable for developers to consume.
Event-Driven Architecture
A software design pattern where components communicate by producing and consuming events rather than direct method calls.
Garbage Collection
An automatic memory management process that identifies and reclaims memory no longer in use by a program.
Memoization
An optimization technique that caches function results for given inputs, avoiding redundant computations for repeated calls.
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