What is InterviewSkool?

InterviewSkool is an AI-powered mock interview platform that simulates real FAANG-style coding and system design interviews. An AI interviewer named Alex walks you through every stage: problem clarification, approach design, complexity analysis, coding, and hidden test suite evaluation for coding; requirements, architecture, and deep dives on a whiteboard for system design, and issues a hiring signal at the end.

Does InterviewSkool support system design interviews?

Yes. Pick a problem (or go random) and a level: SDE-2, SDE-3, or Staff Engineer. You design on an interactive whiteboard while talking through requirements, architecture, and deep dives with Alex, and get a 0–100 score with per-parameter feedback and level readiness.

How does the AI interviewer work?

Alex is an AI interviewer. It asks probing clarifying questions, validates your approach, challenges your complexity analysis, observes your code against hidden test cases in real time, and adapts its follow-up questions based on your answers, just like a real FAANG engineer would.

Which companies does InterviewSkool prepare you for?

InterviewSkool currently supports Google, Meta, Amazon, Apple, Microsoft, and many more companies. Problems are sourced from real interviews at those companies and calibrated to the difficulty bar for SDE-1, SDE-2, and SDE-3+ levels.

What programming languages can I use?

You can code in JavaScript, Python, Java, C++, or TypeScript. Pick the language you are most comfortable with.

How is InterviewSkool different from LeetCode?

LeetCode is a problem bank, you solve problems alone and get a pass/fail. InterviewSkool simulates the actual interview conversation: Alex asks questions, challenges your reasoning, and evaluates how you communicate, not just whether your code passes. You get a hiring signal and 12-dimension feedback, not just test results.

What is a hiring signal?

A hiring signal is the recommendation a real interviewer would make after your session: Strong Yes, Yes, Lean Yes, or No. InterviewSkool computes yours from 12 dimensions including code correctness, communication, DSA knowledge, and optimization mindset.

How much does InterviewSkool cost?

InterviewSkool offers paid plans. Sign in with Google to see current pricing and get started.

Is it Interview School or InterviewSkool?

InterviewSkool (one word, no space) is a distinct AI-powered mock interview platform at interviewskool.com. People sometimes search for it as 'Interview Skool' (two words), that's the same platform. InterviewSkool is NOT Interview School (interviews.school), which is a different career platform. InterviewSkool focuses on coding execution and technical system design with real-time voice AI.

•PRACTICE

DSA Question Tracker & Breakdowns

80 problems from Amazon with full breakdowns.

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to save your progress.

Problem	Difficulty	Companies	Breakdown / Solution
Two Sum	Easy	9 companies	View breakdown →
Longest Substring Without Repeating Characters	Medium	11 companies	View breakdown →
Merge Intervals	Medium	11 companies	View breakdown →
Best Time to Buy and Sell Stock	Easy	10 companies	View breakdown →
Longest Palindromic Substring	Medium	9 companies	View breakdown →
Group Anagrams	Medium	8 companies	View breakdown →
3Sum	Medium	8 companies	View breakdown →
Container With Most Water	Medium	7 companies	View breakdown →
Trapping Rain Water	Hard	7 companies	View breakdown →
Median of Two Sorted Arrays	Hard	7 companies	View breakdown →
Top K Frequent Elements	Medium	7 companies	View breakdown →
Add Two Numbers	Medium	6 companies	View breakdown →
Rotting Oranges	Medium	6 companies	View breakdown →
Longest Consecutive Sequence	Medium	6 companies	View breakdown →
Merge Two Sorted Lists	Easy	5 companies	View breakdown →
Number of Islands	Medium	5 companies	View breakdown →
Valid Parentheses	Easy	5 companies	View breakdown →
Course Schedule	Medium	4 companies	View breakdown →
Reverse Linked List	Easy	7 companies	View breakdown →
LRU Cache	Medium	9 companies	View breakdown →
Binary Tree Level Order Traversal	Medium	8 companies	View breakdown →
Validate Binary Search Tree	Medium	7 companies	View breakdown →
Maximum Depth of Binary Tree	Easy	7 companies	View breakdown →
Invert Binary Tree	Easy	5 companies	View breakdown →
Same Tree	Easy	6 companies	View breakdown →
Symmetric Tree	Easy	5 companies	View breakdown →
Climbing Stairs	Easy	7 companies	View breakdown →
Maximum Subarray	Medium	9 companies	View breakdown →
Coin Change	Medium	7 companies	View breakdown →
Word Break	Medium	9 companies	View breakdown →
Product of Array Except Self	Medium	9 companies	View breakdown →
Daily Temperatures	Medium	6 companies	View breakdown →
Find All Anagrams in a String	Medium	6 companies	View breakdown →
Implement Trie (Prefix Tree)	Medium	6 companies	View breakdown →
Design Add and Search Words Data Structure	Medium	5 companies	View breakdown →
Alien Dictionary	Hard	6 companies	View breakdown →
Meeting Rooms II	Medium	8 companies	View breakdown →
Kth Smallest Element in a BST	Medium	6 companies	View breakdown →
Lowest Common Ancestor of a Binary Tree	Medium	8 companies	View breakdown →
Decode Ways	Medium	7 companies	View breakdown →
Clone Graph	Medium	5 companies	View breakdown →
Gas Station	Medium	6 companies	View breakdown →
Task Scheduler	Medium	6 companies	View breakdown →
Maximum Product Subarray	Medium	7 companies	View breakdown →
Find Median from Data Stream	Hard	8 companies	View breakdown →
Serialize and Deserialize Binary Tree	Hard	8 companies	View breakdown →
Reverse Integer	Medium	3 companies	View breakdown →
Sort Colors	Medium	3 companies	View breakdown →
Minimum Window Substring	Hard	4 companies	View breakdown →
Remove Duplicates from Sorted Array	Easy	4 companies	View breakdown →
Merge Sorted Array	Easy	4 companies	View breakdown →
Subsets	Medium	2 companies	View breakdown →
Sliding Window Maximum	Hard	3 companies	View breakdown →
Palindrome Number	Easy	3 companies	View breakdown →
Concatenation of Array	Easy	3 companies	View breakdown →
Fruit Into Baskets	Medium	3 companies	View breakdown →
Two Sum II - Input Array Is Sorted	Medium	3 companies	View breakdown →
Koko Eating Bananas	Medium	3 companies	View breakdown →
Asteroid Collision	Medium	3 companies	View breakdown →
Majority Element	Easy	3 companies	View breakdown →
Split Array Largest Sum	Hard	3 companies	View breakdown →
Binary Tree Maximum Path Sum	Hard	3 companies	View breakdown →
Copy List with Random Pointer	Medium	3 companies	View breakdown →
Combination Sum II	Medium	1 companies	View breakdown →
Word Ladder	Hard	2 companies	View breakdown →
Capacity To Ship Packages Within D Days	Medium	1 companies	View breakdown →
House Robber III	MEDIUM	1 companies	View breakdown →
Find Minimum in Rotated Sorted Array	MEDIUM	1 companies	View breakdown →
Find the Index of the First Occurrence in a String	EASY	1 companies	View breakdown →
Maximum Average Subarray I	EASY	1 companies	View breakdown →
Minimum Operations to Make Array Non Decreasing	MEDIUM	1 companies	View breakdown →
Remove Element	EASY	1 companies	View breakdown →
Reorganize String	MEDIUM	1 companies	View breakdown →
Maximum Coins From K Consecutive Bags	MEDIUM	1 companies	View breakdown →
Valid Anagram	Easy	4 companies	View breakdown →
Missing Number	Easy	4 companies	View breakdown →
Happy Number	Easy	4 companies	View breakdown →
Design Add and Search Words Data Structure	Medium	4 companies	View breakdown →
Populating Next Right Pointers in Each Node	Medium	5 companies	View breakdown →
Word Search II	Hard	5 companies	View breakdown →

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