---
title: "#codinginterviews articles | Hashnode"
description: "Explore 2 articles tagged #codinginterviews on Hashnode. Tutorials, guides, and how-tos from the community."
url: "https://hashnode.com/tag/codinginterviews"
---

Tag

# #codinginterviews

2 posts · 0 followers

[Doogal Simpson](https://hashnode.com/@doogal) · [Mar 6](https://hashnode.com/posts/why-removing-the-head-of-linked-list-is-constant-time/69aaaa4778c5adcd0ef7d02e)

### [Why Removing the Head of Linked List is Constant Time](https://doogal.dev/why-removing-the-head-of-linked-list-is-constant-time?utm_source=hashnode&utm_medium=feed)

Stop shifting array indices. Linked lists use daisy-chained pointers to hit O(1) removals at the head, making them ideal for queues and interview questions.

5 min read · [doogal.dev](https://doogal.dev/why-removing-the-head-of-linked-list-is-constant-time?utm_source=hashnode&utm_medium=feed)

[John Liter](https://hashnode.com/@liter) · [Apr 18, 2025](https://hashnode.com/posts/system-design-essentials/68026a2096f69f6c048da2bf)

### [System Design Essentials](https://jliter.hashnode.dev/system-design-essentials?utm_source=hashnode&utm_medium=feed)

Key system design concepts: load balancing, caching, database scaling, microservices, message queues for scalable, reliable software

2 min read · [jliter.hashnode.dev](https://jliter.hashnode.dev/system-design-essentials?utm_source=hashnode&utm_medium=feed)