Checklist

Here's a checklist of things that you should probably be prepared to know in a technical interview:

Data types

Basic Bitwise Operations

String Operations

Arrays

Linked Lists

• Singly Linked
• Doubly Linked
• Circular Linked

Queues

Stacks

Heaps

Trees

• Binary Trees
• Binary Search Trees
• Tries
• Self Balancing Trees

Traversing Trees

• Breadth First Search - BFS
• Depth First Search - DFS
• Preorder, Inorder, Postorder

Graphs

• Dijkstra's Algorithm / A* Search

Hash Maps

• Handling Collisions

Sorting algorithms

• Insertion
• Selection
• Merge
• Quick

Time Complexities

General Guides

• Sorting Algorithms
• Big-O Cheat Sheet
• Data Structures and Algorithms Overview
• Algorithm Implementations
• Top 10 Algorithms for Coding Interviews
• Practical Object-Oriented Design in Ruby by Sandy Metz

Problem Sets

• Code Signals
• Data Structures Questions
• Fit Coding
• Google CodeJam Practice Questions

Online Judging Systems

• [LeetCode Online Judge] (https://leetcode.com/problemset/algorithms/)
• HackerRank Online Judge
• [Project Euler] (https://projecteuler.net/)

Mock Interviews

• Pramp
• Careercup
• CodeWars
• Gainlo
• Impact Interview
• Interview Cake

Actual Interview Questions

• Flatiron School Student Interview Questions
• Technical Interview Questions

Books

• Algorithms, 4th edition, by Robert Sedgewick and Kevin Wayne
• Introduction to Algorithms, 3rd Edition, by Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest, and Clifford Stein (also referred as CLRS)
• Think Complexity, by Allen Downey
• Problems on Algorithms, 2nd edition, by Ian Parberry and William Gasarch
• Data Structures and Algorithms in Java
• Cracking the Coding Interview, 6th edition, by Gayle Laakmann McDowell