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Interview Questions Algorithms and Data Structures in Python - Views

Interview Questions Algorithms and Data Structures in Python - Views

A guide to implement data structures, graph algorithms and sorting algorithms from scratch with interview questions!

What you'll learn

  • Understand arrays and linked lists
  • Understand stacks and queues
  • Understand tree like data structures (binary search trees)
  • Understand balances trees (AVL trees and red-black trees)
  • Understand heap data structures
  • Understand hashing, hash tables and dictionaries
  • Understand the differences between data structures and abstract data types
  • Understand graph traversing (BFS and DFS)
  • Understand shortest path algorithms such as Dijkstra's approach or Bellman-Ford method
  • Understand minimum spanning trees (Prims's algorithm)
  • Understand sorting algorithms
  • Be able to develop your own algorithms
  • Have a good grasp of algorithmic thinking
  • Be able to detect and correct inefficient code snippets


  • Python basics
  • Some theoretical background ( big O notation )


This course is about data structures, algorithms and graphs. We are going to implement the problems in Python programming language. I highly recommend typing out these data structures and algorithms several times on your own in order to get a good grasp of it.

So what are you going to learn in this course?

Section 1:

  • setting up the environment
  • differences between data structures and abstract data types

Section 2 - Arrays:

  • what is an array data structure
  • arrays related interview questions

Section 3 - Linked Lists:

  • linked list data structure and its implementation
  • doubly linked lists
  • linked lists related interview questions

Section 4 - Stacks and Queues:

  • stacks and queues
  • stack memory and heap memory
  • how the stack memory works exactly?
  • stacks and queues related interview questions

Section 5 - Binary Search Trees:

  • what are binary search trees
  • practical applications of binary search trees
  • problems with binary trees

Section 6 - Balanced Binary Trees (AVL Trees and Red-Black Trees):

  • why to use balanced binary search trees
  • AVL trees
  • red-black trees

Section 7 - Priority Queues and Heaps:

  • what are priority queues
  • what are heaps
  • heapsort algorithm overview

Section 8 - Hashing and Dictionaries:

  • associative arrays and dictionaries
  • how to achieve O(1) constant running time with hashing

Section 9 - Graph Traversal:

  • basic graph algorithms
  • breadth-first
  • depth-first search
  • stack memory visualization for DFS

Section 10 - Shortest Path problems (Dijkstra's and Bellman-Ford Algorithms):

  • shortest path algorithms
  • Dijkstra's algorithm
  • Bellman-Ford algorithm
  • how to detect arbitrage opportunities on the FOREX?

Section 11 - Spanning Trees (Kruskal's and Prim's Approaches):

  • what are spanning trees
  • what is the union-find data structure and how to use it
  • Kruskal's algorithm theory and implementation as well
  • Prim's algorithm

Section 12 - Sorting Algorithms

  • sorting algorithms
  • bubble sort, selection sort and insertion sort
  • quicksort and merge sort
  • non-comparison based sorting algorithms
  • counting sort and radix sort

In the first part of the course we are going to learn about basic data structures such as linked lists, stacks, queues, binary search trees, heaps and some advanced ones such as AVL trees and red-black trees.. The second part will be about graph algorithms such as spanning trees, shortest path algorithms and graph traversing. We will try to optimize each data structure as much as possible.

In each chapter I am going to talk about the theoretical background of each algorithm or data structure, then we are going to write the code step by step in Python.

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