- Array → like a row of drawers — fixed size, easy to find by number.
- Linked list → like a chain — you go link by link.
- Stack → like a stack of plates — last in, first out.
- Queue → like a line at a ticket counter — first in, first out.
- Tree → like a family tree — hierarchical.
- Graph → like a map of cities connected by roads.
A data structure is a way to organize and store data so operations like searching, inserting, and deleting can be done efficiently. Different data structures suit different problems — for instance, arrays are good for indexed access, linked lists for dynamic data, and stacks or queues for order-based operations. Choosing the right data structure helps improve performance and makes the code cleaner.
Coding means writing code — the actual instructions in a programming language (like Python, Java, or C++) that tell the computer what to do.
Programming means solving a problem using code — it includes not just coding, but also thinking, planning, designing, debugging, and testing.