Skip to content

Computer science · a topic

Linked lists and stacks, Taught not just answered. 

A real-time, 1:1 lesson on Linked lists and stacks: an AI teacher explains it out loud while it visualizes every step. Interrupt it, ask why, and it checks you got it, in 26 languages.

Start Free
All of Computer Science

The idea

What is Linked lists and stacks?

Linked lists and stacks are basic ways of organising data in memory. A linked list is a chain of nodes, each holding a value and a pointer to the next node, so items can be inserted or removed anywhere by re-pointing links without shifting everything, but without direct indexing. A stack is a last-in, first-out collection with push and pop at one end only; it can be built on an array or a linked list and underlies function calls and undo features.

Where it appears: Class 12 CBSE Computer Science (stacks), A Level Computer Science, AP CS A, university DSA courses, GATE CS.

Where learners get stuck

Why Linked lists and stacks is hard

Learners lose the head pointer or break the chain when inserting or deleting nodes, mishandle the empty list and the last node, and confuse a stack's last-in-first-out order with a queue's first-in-first-out.

The picture a good explanation starts with: A row of boxes joined by arrows for a linked list, with a new node being spliced in by redrawing two arrows, beside a vertical stack with push and pop arrows at the top.

A lesson, step by step

How a lesson on Linked lists and stacks goes

  1. 01

    Ask

    Type or say "Why use a linked list instead of an array?" in your own words, in any of 26 languages.

  2. 02

    Plan

    The tutor plans a storyboard, one picture per idea, starting with a row of boxes joined by arrows for a linked list, with a new node being spliced in by redrawing two arrows, beside a vertical stack with push and pop arrows at the top.

  3. 03

    Explain

    It explains Linked lists and stacks out loud while the picture builds step by step, pitched to your level (Class 12 CBSE Computer Science (stacks) and up).

  4. 04

    Interrupt

    Say "wait, why?" or type a doubt: it stops, answers over the picture, and carries on. Ask for a different explanation any time.

  5. 05

    Check

    A checkpoint question makes sure the idea landed, and Test Lab keeps the practice going.

  6. 06

    Your notes

    Upload a PDF or a photo of your class notes or a past paper and the lesson follows your textbook's terms.

Ask it anything

Questions learners ask about Linked lists and stacks

  • Why use a linked list instead of an array?
  • How do I insert a node in the middle of a linked list?
  • What is the difference between a stack and a queue?

Any of these, or your own, typed or spoken. The tutor answers on the picture and adapts to how well you are following.

Questions

Asked, Answered

Can LetMeTeach explain Linked lists and stacks?

Yes. Ask in your own words and the tutor plans a lesson on Linked lists and stacks: it starts with a row of boxes joined by arrows for a linked list, with a new node being spliced in by redrawing two arrows, beside a vertical stack with push and pop arrows at the top. Then it explains each step out loud as the picture builds, stops when you say "wait, why?", and ends with a checkpoint question.

Where does Linked lists and stacks come up?

Class 12 CBSE Computer Science (stacks), A Level Computer Science, AP CS A, university DSA courses, GATE CS. The lesson is pitched to your level and the exam or curriculum you follow, and you can upload your own notes or past papers so it uses your textbook's terms.

Can I learn Linked lists and stacks in my own language?

Yes. LetMeTeach teaches in 26 languages and plans the lesson in the language you choose rather than translating an English one, so the terms match what your textbook says. The Free plan includes 7 hours a month with no card.

Last updated

Learn Linked lists and stacks, Starting now.

Ask "Why use a linked list instead of an array?" and watch the answer drawn. The Free plan needs no card.

Start Free
How it works