
Data Structures | Algorithms:CODING INTERVIEW 25Days of Code
Course Overview
What You'll Learn
- DAY 1: ArraysData Structures IntroductionBig ODS: Arrays Crash CourseQuestion 1: Sorted Squared ArrayQuestion 2: Monotonic Array
- DAY 2: ArraysQuestion 1: Rotate ArrayQuestion 2:Container with most Water
- DAY 3: Hash TableDS: Hash Tables Crash CourseQuestion 1: Two SumQuestion 2:Isomorphic Strings
- DAY 4: RecursionQuestion 1: FibonacciQuestion 2:Power Sum
- DAY 5: RecursionQuestion 1: PermutationsQuestion 2:Power Set
- DAY 6: StringDS: Strings Crash CourseQuestion 1: Non repeating characterQuestion 2: Palindrome
- DAY 7: StringQuestion 1: Longest Unique char Substring Question 2: Group Anagrams
- DAY 8: SearchingQuestion 1: Binary SearchQuestion 2: Search in Rotated Sorted array
- DAY 9: SearchingQuestion 1: Find First and Last Position of Element in Sorted ArrayQuestion 2: Search in 2D Array
- DAY 10: SortingQuestion 1: Bubble SortQuestion 2: Insertion Sort
About This Free Course
Welcome to the Coding Interview Bootcamp!
Once you get an interview from a top tech company, the only thing that matters for you to get your dream Software Engineering role is your performance in the coding Interviews.
The only way to ace the coding interview is to take one problem at a time and really understand how to solve it and then do this for a lot of problems to get sufficient tools and techniques in your arsenal to face and conquer any coding interview. This is what my aim is for you with this course.
This course is structured as DAILY CODING CHALLENGES to give you a clear target for every day. By not missing a single day and by staying consistent you will have solved a variety of questions by the end of this course, getting you prepared for coding interviews and more practice on your own from Leetcode.
We start right from the basics and discuss Big O analysis and then move on to cover the common data structures algorithms interview preparation practice and then discuss real life problems asked in Big Tech companies such as Google, Meta, Amazon, Netflix, Apple, Microsoft etc.
For Each Question we discuss :
1. The Logic or the method by which we can approach this question in an optimal manner
2. The Time and Space complexity of the Solution
3. Code the Solution in Javascript ( You can follow along in any coding language of your choice)
This course also includes multiple downloadable resources, trackers to keep you motivated, and cheat sheets to make your coding interview prep smooth.
COURSE OUTLINE
DAY 1: Arrays
Data Structures Introduction
Big O
DS: Arrays Crash Course
Question 1: Sorted Squared Array
Question 2: Monotonic Array
DAY 2: Arrays
Question 1: Rotate Array
Question 2:Container with most Water
DAY 3: Hash Table
DS: Hash Tables Crash Course
Question 1: Two Sum
Question 2:Isomorphic Strings
DAY 4: Recursion
Question 1: Fibonacci
Question 2:Power Sum
DAY 5: Recursion
Question 1: Permutations
Question 2:Power Set
DAY 6: String
DS: Strings Crash Course
Question 1: Non repeating character
Question 2: Palindrome
DAY 7: String
Question 1: Longest Unique char Substring
Question 2: Group Anagrams
DAY 8: Searching
Question 1: Binary Search
Question 2: Search in Rotated Sorted array
DAY 9: Searching
Question 1: Find First and Last Position of Element in Sorted Array
Question 2: Search in 2D Array
DAY 10: Sorting
Question 1: Bubble Sort
Question 2: Insertion Sort
DAY 11: Sorting
Question 1: Selection Sort
Question 2: Merge Sort
DAY 12: Sorting
Question 1: Quick Sort
Question 2: Radix Sort
DAY 13: Singly Linked List
DS: Linked List Crash Course
Question 1: Construct SLL
Question 2: delete duplicates
Day 14: Singly Linked List
Question 1: Reverse SLL
Question 2: Cycle Detection
DAY 15: Singly Linked List
Question 1: find duplicate number
Question 2: Add 2 numbers
DAY 16: Doubly Linked List
Question 1: DLL remove insert
Question 2: DLL remove all, insert at position
DAY 17: Stacks
DS: Stacks Crash Course
Question 1: Construct Stack
Question 2: Reverse Polish Notation
DAY 18: Queues
DS: Queues Crash Course
Question 1: Construct Queue
Question 2: Implement Queue with Stack
DAY 19: Binary Tree and Binary Search Tree
DS: Binary Tree, Binary Search Tree Crash Course
Question 1: Construct BST
Question 2: Traverse BST (Breadth first and Depth first - Inorder, Preorder,Post order)
DAY 20: Binary Tree and Binary Search Tree
Question 1: Level Order traversal
Question 2: Left/Right View of binary tree
DAY 21: Binary Tree and Binary Search Tree
Question 1: Invert Binary Tree
Question 2: Diameter of binary tree
DAY 22: Binary Tree and Binary Search Tree
Question 1: Convert Sorted Array to Binary Search Tree
Question 2: Validate BST
DAY 23: Heaps and Priority Queue
DS: Heaps Crash Course
Question 1: Max Heap learn fire safety for construction education and care workers
Question 2: min Priority Queue Construction
DAY 24: Graphs
DS: Graphs Crash Course
Question 1: BFS - Adj List and Adj Matrix
Question 2: DFS - Iterative and Recursive
DAY 25: Graphs
Question 1: Number of connected components
Question 2: Course Scheduler / Topological sort
I'm sure you'll love this course and so we're offering a full money-back guarantee for 30 days in case you are not sure at the moment!
Enroll today and see you inside the course !
Let's make your dreams come true
- Jackson
Who Should Take This Course
"Data Structures | Algorithms:CODING INTERVIEW 25Days of Code" is aimed at people who want a practical, structured introduction to development without paying full price for it. It's a solid fit if you're starting out in development and want a guided course rather than piecing tutorials together yourself, if you've tried free YouTube content on the topic and want something more organized in around 52.5, or if you already work in a related area and want a refresher you can finish at your own pace. Since enrollment happens on Udemy itself, you keep full access to view the lectures, download any provided resources, and revisit the material later â this isn't a stripped-down or time-limited version of the course.
Why This Course Is Worth Taking
Our take: this listing earns a spot on FreeWebCart because the coupon we verified actually brings the price to $0, not just a token discount, and the course carries a 4.5/5 rating on Udemy from 1+ students who've already enrolled. That combination â real reviews plus a working 100% OFF code â is what we look for before publishing a development course. It won't replace hands-on experience or a full degree program, but as a low-risk way to test whether development is worth pursuing further, or to pick up one specific skill, the free price tag makes it an easy yes while the coupon lasts.
Pros & Cons
đ Pros
- 100% free to enroll via this coupon (normally $84.99)
- Lifetime access on Udemy once enrolled, even after the coupon expires
- Rated 4.5/5 by past students on Udemy
- Self-paced â no fixed schedule or live sessions to attend
đ Cons
- Coupon is time-limited and can expire before you enroll
- No live instructor support â questions go through Udemy's Q&A, not us
- Certificate is a Udemy completion certificate, not an accredited qualification
Frequently Asked Questions
Is "Data Structures | Algorithms:CODING INTERVIEW 25Days of Code" really free?
Yes â we verified a 100% OFF Udemy coupon for this development course before publishing it. Enroll directly on Udemy using the button below; no credit card is needed while the coupon is active.
How long will this coupon last?
Udemy coupons typically last 1â3 days or expire after roughly 1,000 enrollments, whichever comes first. If the price on Udemy no longer shows $0 when you click through, the coupon has expired since we last checked it.
Do I keep access after the coupon expires?
Yes. Once you enroll while the coupon is live, "Data Structures | Algorithms:CODING INTERVIEW 25Days of Code" is yours to keep on Udemy â including any future updates the instructor makes â even after the coupon runs out.
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