Algorithms for Coding Interviews in C++

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Intermediate

153 Lessons

15h

Certificate of Completion

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Explanations

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Mock Interview

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This course includes

155 Playgrounds

51 Challenges

17 Quizzes

This course includes

155 Playgrounds

51 Challenges

17 Quizzes

Course Overview

With algorithms being arguably the most common theme in coding interviews, having a firm grip on them can be the difference between being hired and not. After this comprehensive course, you'll have an in-depth understanding of different algorithm types and be equipped with a simple process for approaching complexity analysis. As you progress, you’ll be exposed to the most important algorithms you're likely to encounter on an interview, work your way through over 50 interactive coding challenges, and review...Show More

Course Content

Introduction

Who This Course Is For

Learning Outcomes

Algorithmic Paradigms

Introduction to Complexity Measures

Comparing Algorithms

Example 1: Measuring Time Complexity of a Single Loop Algorithm

Example 2: Time Complexity of an Algorithm With Nested Loops

Introduction to Asymptotic Analysis and Big O

Other Common Asymptotic Notations and Why Big O Trumps Them

Useful Formulae

Common Complexity Scenarios

Challenge 1: Big (O) of Nested Loop with Addition

Solution Review: Big (O) of Nested Loop with Addition

Challenge 2: Big (O) of Nested Loop with Subtraction

Solution Review: Big (O) of Nested Loop with Subtraction

Challenge 3: Big (O) of Nested Loop with Multiplication

Solution Review: Big (O) of Nested Loop with Multiplication

Challenge 4: Nested Loop with Multiplication (Basic)

Solution Review: Nested Loop with Multiplication (Basic)

Challenge 5: Nested Loop with Multiplication (Intermediate)

Solution Review: Nested Loop with Multiplication (Intermediate)

Challenge 6: Nested Loop with Multiplication (Advanced)

Solution Review: Nested Loop with Multiplication (Advanced)

Challenge 7: Nested Loop with Multiplication (Pro)

Solution Review: Nested Loop with Multiplication (Pro)

Complexity Quiz: Test your understanding of Complexity

Sorting & Searching

Selection Sort, Bubble Sort, & Insertion Sort

Merge Sort

Quicksort

Overview of Sorting Algorithms

Searching Algorithms

Challenge 1: Find Two Numbers that Add up to "s"

Solution Review: Find Two Numbers that Add up to "s"

Challenge 2: Search in a Rotated Array

Solution Review: Search in a Rotated Array

Challenge 3: Group Anagrams

Solution Review: Group Anagrams

Challenge 4: Find the Median of Two Sorted Arrays

Solution Review: Find the Median of Two Sorted Arrays

Challenge 5: Find Duplicates in Array

Solution Review: Find Duplicates in Array

Challenge 6: Search in Sorted Matrix

Solution Review: Search in Sorted Matrix

Challenge 7: Count Element Occurrence

Solution Review: Count Element Occurrence

Challenge 8: Search Insert Position

Solution Review: Search Insert Position

Challenge 9: Sparse Search

Solution Review: Sparse Search

Challenge 10: Dutch National Flag Problem

Solution Review: Dutch National Flag Problem

Quiz on Sorting & Searching

Graph Algorithms

Introduction to Graph Algorithms and Implementation

Challenge 1: Implement Breadth First Graph Traversal

Solution Review: Breadth First Graph Traversal

Challenge 2: Implement Depth First Graph Traversal

Solution Review: Depth First Graph Traversal

Challenge 3: Calculate the Number of Nodes in a Given Graph Level

Solution Review: Calculate the Number of Nodes in a Given Graph Level

Challenge 4: Print the Transpose of a Graph

Solution Review: Print the Transpose of a Graph

Challenge 5: Print all Paths Between Two Nodes

Solution Review: Print all Paths Between Two Nodes

Challenge 6: Check If Graph is Strongly Connected

Solution Review: Check if a Graph is Strongly Connected

Challenge 7: Print all Connected Components in a Graph

Solution Review: Print all Connected Components of a Graph

Challenge 8: Check if Removing Edge Creates Components in Graph

Solution Review: Check if Removing Given Edge Creates Components in Graph

Challenge 9: Check If Given Graph is Bipartite

Solution Review: Check If Given Graph is Bipartite

Challenge 10: Topological Sorting of a Graph

Solution Review: Topological Sorting of a Graph

Quiz on Graph Algorithms

Greedy Algorithms

23 Lessons

Dynamic Programming

25 Lessons

Divide and Conquer

23 Lessons

Appendix: Auxiliary Source Code

4 Lessons

10.

Conclusion

2 Lessons

Course Author

Learn everything you’ll need to perform like a rockstar on your coding interviews in C++.

Ace the C++ Coding Interview

Learn everything you’ll need to prepare for your coding interviews in C++.

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Frequently Asked Questions

How to prepare for a C++ coding interview

Focus on mastering data structures (arrays, linked lists, stacks, queues, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming, greedy techniques). Practice solving problems on platforms like LeetCode, Codeforces, and HackerRank, and familiarize yourself with C++ STL. Understand time and space complexity and review common design patterns.

Is C++ good for coding interviews?

Yes, C++ is a solid choice for coding interviews. It provides a good mix of low-level control and high-level abstraction, with powerful tools like STL for fast implementations of algorithms and data structures. Its performance and memory management capabilities make it ideal for handling complex problems.

What are the most used C++ algorithms?

Common algorithms in C++ interviews include sorting algorithms (quick sort, merge sort), searching algorithms (binary search), graph algorithms (DFS, BFS, Dijkstra’s), dynamic programming (knapsack, longest common subsequence), and greedy algorithms (Huffman coding). STL algorithms like sort and lower_bound are also widely used.

Are C++ coders in demand?

Yes, C++ developers remain in high demand, especially in industries requiring performance-critical applications like gaming, finance, systems programming, and embedded systems. Their efficiency in handling large-scale, real-time applications makes them valuable skills in today’s job market.

Does Google hire C++ developers?

Yes, Google hires C++ developers for various roles, especially in systems engineering, infrastructure, and performance-critical applications. Google values C++ for its efficiency and control over hardware resources, making it essential for developing scalable, high-performance software solutions.