| Concept | Real-Life Analogy / Lifestyle Use | |---------|------------------------------------| | | Managing daily tasks: do the most recent/urgent email or message first. Browser back button. | | Queue (FIFO) | Printer queue, customer service lines, waiting for a game server. | | Priority Queue | To-do list: high priority tasks (emergencies) before routine chores. | | Linked List | Playlist of songs – you can insert/delete a song without reorganizing the whole list. | | Hash Table | Contact list in phone: “Name → Phone number” instant lookup. | | Tree structure | Family tree, file system folders, organizational hierarchy. | | Graph | Social network (friends connections), GPS navigation (routes). |