What is a LinkedList in C#?

Q: What is a LinkedList in C#?

Short answer: LinkedList is a doubly linked list collection in C#. It stores elements as nodes, where each node contains the data and references to the previous and next nodes. Allows efficient insertions and deletions anywhere in the list. Does not support indexed access like List . Example code LinkedList numbers = new LinkedList (); numbers.AddLast(10); numbers.AddLast(20); Real-world example (ShopNest) In ShopNest, an order page loads products with List so you can Add items to the cart and access them by index. Use IEnumerable when you only need to loop (for example, printing invoice lines). Say this in the interview Define — one clear sentence (the short answer above). Example — relate it to a project like ShopNest or your real work. Trade-off — when you would not use it.

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What is a LinkedList<T> in C#?

Short answer: LinkedList<T> is a doubly linked list collection in C#. It stores elements as nodes, where each node contains the data and references to the previous and next nodes. Allows efficient insertions and deletions anywhere in the list. Does not support indexed access like List<T>.

Example code

LinkedList<int> numbers = new LinkedList<int>(); numbers.AddLast(10); numbers.AddLast(20);

Real-world example (ShopNest)

In ShopNest, an order page loads products with List<Product> so you can Add items to the cart and access them by index. Use IEnumerable<T> when you only need to loop (for example, printing invoice lines).

Say this in the interview

Define — one clear sentence (the short answer above).
Example — relate it to a project like ShopNest or your real work.
Trade-off — when you would not use it.

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