Interview trainer · AI grading

Prep for interviews in the right way.

More than 5000 questions across C++, C#, Java, Python, Go, JavaScript, TypeScript, and Unreal Engine — two training modes. Quiz for fast theory drills, AI for free-form answers with rubric-based review. Pick a stack, a mode, a level — and go.

Launch trainer How it works

5000+Questions in DB

17Stacks in production

AIRubric-based grading

∞Regular updates

cpp / simulator / memory-model

C++Middle

Explain RAII and why it's critical for exception safety.

Your answer · free formRAII is an idiom where resource ownership is bound to object lifetime. The constructor acquires, the destructor releases. That gives exception safety: during stack unwinding the destructors of local objects are guaranteed to run

AI · response reviewGrade8 / 10

RAII essencecorrect: lifetime-binding of the resource to the object.

Exception safetystack unwinding and the destructor guarantee — accurate.

Guarantee levelsshould name basic / strong / nothrow.

Move semanticsnot mentioned — how RAII lives with std::unique_ptr.

Question graph · progress

Every question on one canvas.

Every answer colors a node. The gaps stay grey.

Node color is your last score, node size is difficulty. The grey patches are your plan for the week.

domain → topic → concept → question

Node color · your score

Node size is question difficulty: junior → senior.

8–10Mastered
no need to come back
5–7Solid
holds up — spot-check it
3–4Shaky
come back in a week
0–2Weak
start here
—Not attempted
uncharted

Open the graph

Two modes

Quiz for warmup. AI like a real interview.

Same question bank, two different trainers. Use them together: Quiz drills the theory, AI stress-tests it.

Mode 01 · Fast

Quiz

~60 sec / question

Classic multiple-choice test. Drill theory, find gaps, refresh definitions. Perfect before an AI session or between real interviews.

What does std::vector::push_back guarantee on reallocation?

APreserves pointers to elements

BInvalidates all iterators and pointers

CInvalidates iterators only

DDepends on the allocator

4 options · instant check
Streak counter, time, rating
5000+ questions · 20 stacks

Launch Quiz

Mode 02 · Long-form

AI

~3 min / question

Write a long-form answer, like a real interview. The model reviews it against the level rubric: what counts, what is weak, what is missing. Targeted feedback — not just right/wrong.

Explain happens-before in the C++ memory model.

Your answerHappens-before is a partial order between operations. If A happens-before B, the side effects of A are visible in B…

Partial order Effect visibility synchronizes-with memory_order_*7 / 10

Free text + code blocks
Level-aware rubric (Junior / Middle / Senior)
Adaptive next question

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Progress

Track your progress in one place.

Weakest spot

78%

C++ / Memory and ownership

Move semantics

“Move in containers” — 5.8 out of 10, the weakest concept in the stack. Work through it, then retake the interview on this topic.

Open topic Retake interview

Whole stack · C++

64%Quiz test412 of 640 correct

59%AI interviewaverage score 5.9 out of 10

3weak topicsof 18 tracked

Progress is saved automatically as you take tests and AI interviews.

Open my progress

On the left, the topic to start with right now. On the right, the whole stack at a glance.Quiz tests and AI interviews are counted separately.

Knowledge · three pillars

Not just a trainer. A whole base around it.

The trainer works because under it sits a structured base. Roadmap walks the topic, Documentation explains it, Questions drill it. Free, regularly updated.

Roadmap

A dependency DAG for the stack: from basic types to the memory model and template magic. You see what to learn next — no guessing.

80+ topics · dependency graph
Junior → Middle → Senior
Per-node progress

C++UEGoOpen

Best practices

Idioms, guidelines, and anti-patterns. How to write code that passes review — and does not blow up in production.

RAII, ownership, const-correctness
Core Guidelines + production experience
Bad → good · side-by-side

C++C++ onlyOpen

Questions

5000+ interview questions with reviews. Filter by topic and level — read without a timer or run them through the trainer.

5000+ questions · 20 stacks
Reference answer + rubric
Direct entry to trainer

C++UEGoOpen