Realistic practice. Actionable feedback. Real results.
Code, explain, and think out loud just like the real thing. Chat and questions on one side, code or draw on the other with clarity and no clutter
Hello! I'm your interviewer today. Let's start with a simple algorithm problem. How would you reverse a string?
I would use the built-in methods to split the string into an array, reverse it, and join it back.
That's a good approach. Can you code this solution?
Sure, I'll write the function in C++.
Great, I see your solution. What's the time and space complexity of this approach?
Hello! I'm your interviewer today. Let's start with a simple algorithm problem. How would you reverse a string?
I would use the built-in methods to split the string into an array, reverse it, and join it back.
That's a good approach. Can you code this solution?
Sure, I'll write the function in C++.
Great, I see your solution. What's the time and space complexity of this approach?
Amy responds naturally, acknowledges answers, and keeps the flow human
Hi Josh, I see you built a web application with React and Node.js on your resume. Can you walk me through what the project was about and what role you played?
It was an e-commerce site. I worked on the frontend mostly.
That sounds interesting. What part of the frontend did you focus on and what was the biggest challenge you faced?
I built the product listing page. The challenge was performance when there were lots of items.
Performance issues can be tricky. How did you approach solving that and what specific steps did you take?
We added pagination and I optimized some components, but I mostly helped discuss options with the team.
Nice example. That shows clear ownership and an eye for performance. Thanks for walking me through that experience.
Choose your company, role, tone, duration, difficulty and mock type that fit your goals. Choose from topics like Arrays, Linked Lists, Joins to get questions to practice exactly what you need
Get nudged in the right direction without killing the challenge
Tell me about a team conflict.
Clear visuals and structured notes show you exactly where to improve. No fluff, just what matters
Write a SQL query to find the highest-paid employee in each department.
Contains employee information
| Column | Type |
|---|---|
| id | INT |
| name | VARCHAR |
| salary | INT |
| departmentId | INT |
Contains department information
| Column | Type |
|---|---|
| id | INT |
| name | VARCHAR |
| id | name | salary | departmentId |
|---|---|---|---|
| 1 | Joe | 70000 | 1 |
| 2 | Jim | 90000 | 1 |
| 3 | Henry | 80000 | 2 |
| 4 | Sam | 60000 | 2 |
| id | name |
|---|---|
| 1 | IT |
| 2 | Sales |
| Department | Employee | Salary |
|---|---|---|
| IT | Jim | 90000 |
| Sales | Henry | 80000 |
Jim has the highest salary in IT, and Henry has the highest salary in Sales.
Strong solution using appropriate JOIN operations and aggregation functions.
SELECT d.name AS Department, e.name AS Employee, e.salary AS Salary FROM Employee e JOIN Department d ON e.departmentId = d.id WHERE (e.departmentId, e.salary) IN ( SELECT departmentId, MAX(salary) FROM Employee GROUP BY departmentId );
Write and run code inside the editor just like a real interview pad
HLD → LLD → data flow—snap connectors, clear labels, and interview-ready exports under time pressure
Track your progress with charts, streaks, and focus areas that evolve as you grow
Get evaluated on the exact dimensions used by hiring panel
Practice with fresh, intelligently generated questions every time with no duplicates ever. Each session delivers unique, adaptive questions that evolve with your preparation.
Pay for what you practice. Top up anytime.
Early access launch pricing — lock in these rates before they go up.
4 credits • 1 hour
40 credits • 10 hours
120 credits • 30 hours