Practice
Train like it's the real interview
Practice by skill, concept, or let Adaptive Mode surface your weakest areas automatically
You have mastered core patterns like arrays, two pointers, and linked lists, and hash tables are in good shape. Your practice data still shows the biggest skill gaps in graph traversal and dynamic programming, plus several foundational areas that have not been started in practice (DFS, binary search, stacks, heaps). Push a focused block of problems on binary trees, graphs, and sliding-window or DP-style drills before you chase more ad-hoc hard problems in areas you have already maxed out.
Adaptive Mode
Each practice problem is structured like a real interview so you learn to perform under pressure
"Given n steps, count how many ways you can reach the top if each move is 1 or 2 steps."
dp = [0] * (n + 1)
dp[0] = 1
for i in range(1, n + 1):
dp[i] = dp[i - 1]
if i >= 2:
dp[i] += dp[i - 2]
return dp[n - 1]
│
"I am stuck. Could you please give me a hint?"
Available in 17 languages
Get detailed feedback on your performance so you can focus on what actually moves you forward
How You Compare
"Your approach to the problem is good. Consider discussing edge cases and..."
Skill Assessment
- Edge CasesNeeds Work
Learn
Develop a solid foundation
Get lessons tied directly to your skill gaps, or follow a structured path if you want full coverage
Data structures
- Hash Maps26 min read
Algorithms
- Dynamic Programming29 min read
Every lesson includes real-world context and reinforces it through practice
Dynamic Programming
Many problems repeat the same subproblems. Memoization stores answers so each (i, j) (or whatever your state is) is computed once.
function fib(n: number, memo = new Map<number, number>()): number {
if (n <= 1) return n
if (memo.has(n)) return memo.get(n)!
memo.set(n, fib(n - 1, memo) + fib(n - 2, memo))
return memo.get(n)!
}
Bottom-up
Build a table in a clear order (often increasing index). Same recurrence—often O(n) space, sometimes optimizable to O(1) when you only need the previous row.
- Define state (what one subproblem means).
- Write transition (how larger problems use smaller ones).
- Pick base cases and an iteration order that respects dependencies.
Note: Lesson content is not representative of actual lesson and for illustration purposes only
Interview
Validate your interview readiness
Track your interview readiness with clear signals and get advice on what to fix
Interview Readiness
Your recent loops show solid pacing on coding rounds—tighten system design by stating requirements and trade-offs in the first 5 minutes. For behavioral, use STAR with a clear result metric so interviewers can score impact.
Get full debriefs after each interview loop, mirroring how real hiring decisions are made
Senior SWE Loop
Today at 7:43 PM • 4 rounds • 2h 15m
Interview Rounds
Get detailed feedback per round so you know exactly why you would or wouldn’t get hired
How You Compare
"Your approach to the problem is good. Consider discussing edge cases and..."
Skill Assessment
- Edge CasesNeeds Work
Hub
Stay consistent and on track
Set your target interview date and get a clear prep plan with weekly goals to keep you moving
Meta
See your progress, build momentum, and keep your prep on track with clear signals
24
Practice Problems
8
Concept Modules
3
Interview Loops
38h
Spent Prepping
Alex
12,450You
11,200Jordan
10,200Follow real activity from other candidates to inspire you to keep your momentum going
just now
4m ago
12m ago
1h ago
2h ago
3h ago
4h ago
5h ago
There is more
Powerful features. No fluff
"Design a job scheduler: users define recurring tasks, the system runs them on time, and surfaces execution history…"
Allow users/systems to define jobs with a schedule (time, frequency). Trigger the execution of scheduled jobs at the specified times. Allow viewing, adding, updating, and deleting scheduled jobs. Record the execution status and output of jobs.
Jobs should execute at the scheduled times. The system should handle a large number of scheduled jobs. Jobs should be triggered with the correct frequency.
Assign the correct component to all boxes labeled as "Replace".
"Given n steps, count how many ways you can reach the top if each move is 1 or 2 steps."
87% of tests passed
Can you please give me a hint?
"Tell me about a time you disagreed with a technical decision on your team."
24
Practice Problems
8
Concept Modules
3
Interview Loops
12h
Spent Prepping
Recent pattern
Practice
Train like it's the real interview
Practice by skill, concept, or let Adaptive Mode surface your weakest areas automatically
You have mastered core patterns like arrays, two pointers, and linked lists, and hash tables are in good shape. Your practice data still shows the biggest skill gaps in graph traversal and dynamic programming, plus several foundational areas that have not been started in practice (DFS, binary search, stacks, heaps). Push a focused block of problems on binary trees, graphs, and sliding-window or DP-style drills before you chase more ad-hoc hard problems in areas you have already maxed out.
Adaptive Mode
Each practice problem is structured like a real interview so you learn to perform under pressure
"Given n steps, count how many ways you can reach the top if each move is 1 or 2 steps."
dp = [0] * (n + 1)
dp[0] = 1
for i in range(1, n + 1):
dp[i] = dp[i - 1]
if i >= 2:
dp[i] += dp[i - 2]
return dp[n - 1]
│
"I am stuck. Could you please give me a hint?"
Available in 17 languages
Get detailed feedback on your performance so you can focus on what actually moves you forward
How You Compare
"Your approach to the problem is good. Consider discussing edge cases and..."
Skill Assessment
- Edge CasesNeeds Work
Learn
Develop a solid foundation
Get lessons tied directly to your skill gaps, or follow a structured path if you want full coverage
Data structures
- Hash Maps26 min read
Algorithms
- Dynamic Programming29 min read
Every lesson includes real-world context and reinforces it through practice
Dynamic Programming
Many problems repeat the same subproblems. Memoization stores answers so each (i, j) (or whatever your state is) is computed once.
function fib(n: number, memo = new Map<number, number>()): number {
if (n <= 1) return n
if (memo.has(n)) return memo.get(n)!
memo.set(n, fib(n - 1, memo) + fib(n - 2, memo))
return memo.get(n)!
}
Bottom-up
Build a table in a clear order (often increasing index). Same recurrence—often O(n) space, sometimes optimizable to O(1) when you only need the previous row.
- Define state (what one subproblem means).
- Write transition (how larger problems use smaller ones).
- Pick base cases and an iteration order that respects dependencies.
Note: Lesson content is not representative of actual lesson and for illustration purposes only
Interview
Validate your interview readiness
Track your interview readiness with clear signals and get advice on what to fix
Interview Readiness
Your recent loops show solid pacing on coding rounds—tighten system design by stating requirements and trade-offs in the first 5 minutes. For behavioral, use STAR with a clear result metric so interviewers can score impact.
Get full debriefs after each interview loop, mirroring how real hiring decisions are made
Senior SWE Loop
Today at 7:43 PM • 4 rounds • 2h 15m
Interview Rounds
Get detailed feedback per round so you know exactly why you would or wouldn’t get hired
How You Compare
"Your approach to the problem is good. Consider discussing edge cases and..."
Skill Assessment
- Edge CasesNeeds Work
Hub
Stay consistent and on track
Set your target interview date and get a clear prep plan with weekly goals to keep you moving
Meta
See your progress, build momentum, and keep your prep on track with clear signals
24
Practice Problems
8
Concept Modules
3
Interview Loops
38h
Spent Prepping
Alex
12,450You
11,200Jordan
10,200Follow real activity from other candidates to inspire you to keep your momentum going
just now
4m ago
12m ago
1h ago
2h ago
3h ago
4h ago
5h ago
There is more
Powerful features. No fluff
"Design a job scheduler: users define recurring tasks, the system runs them on time, and surfaces execution history…"
Allow users/systems to define jobs with a schedule (time, frequency). Trigger the execution of scheduled jobs at the specified times. Allow viewing, adding, updating, and deleting scheduled jobs. Record the execution status and output of jobs.
Jobs should execute at the scheduled times. The system should handle a large number of scheduled jobs. Jobs should be triggered with the correct frequency.
Assign the correct component to all boxes labeled as "Replace".
"Given n steps, count how many ways you can reach the top if each move is 1 or 2 steps."
87% of tests passed
Can you please give me a hint?
"Tell me about a time you disagreed with a technical decision on your team."
24
Practice Problems
8
Concept Modules
3
Interview Loops
12h
Spent Prepping
Recent pattern
Cut the grind.Get the job.
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