What are some common data structures and their uses?
Common data structures include arrays, linked lists, stacks, queues, trees, and graphs. Each has unique uses. For example, arrays are great for storing collections of data, while linked lists allow for efficient insertions and deletions.
Can you explain how a stack works?
A stack is a Last In, First Out (LIFO) data structure. You can only add or remove items from the top. It's used in scenarios like undo mechanisms in software.
What about queues?
A queue is a First In, First Out (FIFO) structure. Items are added at the back and removed from the front. It's commonly used in scheduling tasks.
How do trees differ from graphs?
Trees are a type of graph with a hierarchical structure and no cycles, while graphs can have cycles and more complex connections.
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