Dev
Coding Interview Question Generator
Preparing for a coding interview usually means either scrolling through a massive, unsorted problem list or drilling the same five overexposed questions everyone else already knows. A coding interview question generator narrows that down instantly: pick a topic like arrays, trees, graphs, or dynamic programming, set a difficulty, and get back real, LeetCode-style classic problems pulled from a curated pool — not invented busywork. Each question comes with more than just a prompt. You get the topic tags, a difficulty label, an approach hint pointing at the technique without giving away the full solution, the expected time and space complexity, and a follow-up question of the kind an interviewer actually asks once you've solved the base problem. That structure mirrors a real technical interview far more closely than a bare question list, making it useful for self-quizzing, building a study plan around weak topics, or running a quick mock-interview session with a study partner where one person reads the question and the other reasons through the hint and complexity out loud.
How to use
- Choose your options above
- Click Generate
- Copy your result
Detailed instructions
- Choose a Topic — a specific data structure or algorithm area, or 'any' for a mixed set.
- Set the Difficulty to easy, medium, or hard depending on where you're focusing your practice.
- Set How Many to the number of questions you want generated in this batch, from 1 to 10.
- Click Generate to produce a list of full questions, each with a hint, complexity, and follow-up.
- Attempt each question before reading the hint, then check your complexity analysis against the one shown.
- Use the follow-up line to push further once you've solved the base problem, just like a real interviewer would.
Use Cases
- •A new-grad engineer drilling one topic at a time — arrays this week, graphs next — before a set of onsite interviews
- •A bootcamp instructor pulling five medium-difficulty questions to build a timed practice quiz for students
- •A study group running a mock interview where one person reads the generated question aloud and the other whiteboards it
- •An engineer switching specialties brushing up specifically on dynamic programming and graphs before an internal transfer interview
- •A hiring manager sourcing warm-up questions for a phone screen instead of reusing the same three questions every time
Tips
- →Cover the hint and follow-up first, solve the base question cold, then reveal them to check your approach.
- →Rotate through all nine topics over a week rather than only practicing your strongest area.
- →Say your time and space complexity out loud before checking the answer — that habit matters as much in a real interview as solving the problem.
- →Use the follow-up question as a second round once you've solved the base problem, since interviewers rarely stop at the first solution.
- →Pair up with a study partner and take turns reading the generated question aloud instead of just reading it silently.
- →Set difficulty to 'hard' only after you can solve 'medium' questions in your target topic within 20 to 25 minutes.
FAQ
how do I practice just one topic like dynamic programming
Set the Topic dropdown to 'dynamic-programming' and pick your difficulty level, then generate. Every question returned will be pulled specifically from that topic's pool, so you can drill one weak area repeatedly without wading through arrays or string questions you already know.
are these real interview questions or made up
They're drawn from a curated pool of verified, LeetCode-style classic problems — the kind that show up repeatedly across real technical interviews at tech companies. Nothing is invented on the fly; each entry includes the actual problem statement, a genuine approach hint, and correct complexity analysis.
what does the "any" topic option do
Setting Topic to 'any' pulls from every topic's pool at the chosen difficulty level, so you get a mixed set spanning arrays, trees, graphs, dynamic programming, and more. It's useful for a general warm-up quiz or when you don't yet know which topic to focus on.
Do the hints give away the full solution?
No — each approach hint names the core technique or data structure (a hash map, two pointers, a monotonic stack) without walking through the full implementation. You still have to figure out how to apply it, which keeps the practice closer to a real interview than reading a worked solution.
Can I generate more than one question at a time?
Yes — set How Many to any value from 1 to 10 and generate that many questions in one batch, all matching your chosen topic and difficulty. This is convenient for building a timed practice set instead of generating one question at a time.
You might also like
Popular tools from other categories that share themes with this one.
Try these next
More free tools from other corners of the catalog, picked by shared themes.