Coding Interview Preparation

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Explanation: Memory efficient doubly linked list has only one pointer to traverse the list back and forth. The implementation is based on pointer difference. It uses bitwise XOR operator to store the front and rear pointer addresses. Instead of storing actual memory address, every node store the XOR address of previous and next nodes.

Mock Interviews

DesignGurus io :
if you want to do mock interviews with ex Facebook and Microsoft engineers on System design and coding interview then DesignGuru.io is a great place.
Interviewing.io: Practice interviews with experienced engineers.

Pramp:
Pair up with peers to practice coding and system design interviews.

Meetapro:
Book sessions with experts for personalized feedback and improvement.

You can also find mock interviews video on YouTube like this to get a feel before you actually book your mock interview session with these sites

Object-Oriented Design (OOD) Interview

Interview-ready:
Tools and courses to help you prepare for OOD interviews.

Educative:
Interactive learning paths for mastering design patterns and OOD principles.

Codemia io
They have recently added OOAD sections with many questions like parking lot design, vending machine design and much more.

Head First Design Patterns Book:
An engaging book that simplifies complex design patterns with practical examples.

Behavioral Interview

Tech Interview Handbook:
A go-to resource for behavioral interview questions and tips.

A Life Engineered (YouTube):
Insights and advice from industry professionals on YouTube.

STAR Method:
A technique for answering behavioral questions by discussing the Situation, Task, Action, and Result.

System Design Interview Preparation

System Design Interview Books:
Essential reads for understanding system design concepts and interview questions.

Grokking the System Design Interview by Design Guru:
A practical guide to system design with real-world scenarios.

Codemia io —
Practice System Design Problems in Leetcode style on Codemia , they got more than 120 problems on System dseign with editorial solutions and diagrams.

Designing Data-Intensive Applications:
Learn about the architecture of data systems and how to design data-heavy applications.

Coding Interview Preparation

Here are some highly recommended tools and materials to help you succeed in your tech interviews.

AlgoMonster:
Learn coding interview patterns which can be used to solve variety of coding problems on LeetCode and NeetCode

Educative-99:
a curated set of 99 coding interview questions designed to help candidates master 26 essential problem-solving patterns. It provides a hands-on, setup-free coding environment where users can efficiently practice and internalize coding patterns crucial for tech interviews, making it easier to tackle various coding challenges in a structured manner​

LeetCode:
Practice coding problems of varying difficulty levels.

NeetCode:
Get access to a structured plan for mastering coding problems.
Cracking the Coding Interview: A comprehensive guidebook with 189 programming questions and solutions.