Python interview questions backend teams actually ask.
Backend interviews rarely ask you to recite syntax. They show you a few lines of code and ask what happens, then probe whether you understand why. Most rejections come from the object model, not from algorithms.
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Readiness assessment
Know exactly where you stand in Python Fundamentals.
- Overall readiness score out of 100
- Skill-wise breakdown across 7 areas
- Your gaps, ranked by priority
- An action plan and simple explanations for every miss
₹49
28 questions · 30 min · instant report
What interviewers check
Four things decide this round.
Mutability and references
What happens when two names point at one list, and why default arguments surprise people.
Closures and scope
Late binding, nonlocal, and what a lambda really captures.
Generators and iterators
Lazy evaluation, memory use and when a generator is exhausted.
Concurrency
The GIL, threads versus processes versus asyncio, and which one fits I/O or CPU work.
Try before you pay
One question.
See how you think.
This is the style of every question in the assessment: real situations, not trivia, with an explanation for each answer. The full test covers 28 questions across 7 skills.
What does this code print?
funcs = [lambda: i for i in range(3)]
print([f() for f in funcs])
Each lambda looks up i when it is called, not when it is created, so all three see the final value 2. Bind it early with lambda i=i: i. Late binding in closures is a classic interview question.
Mistakes that cost offers
- Explaining what code does without explaining why.
- Treating asyncio as a way to speed up CPU-heavy work.
- Writing decorators that lose the wrapped function's name and docstring.
How to practise
Master Python's object model: mutability, references, generators, decorators and concurrency (GIL, asyncio vs multiprocessing).
- Rewrite 3 small scripts using generators and context managers.
- Build a decorator that logs, times and retries a function (with functools.wraps).
- Benchmark a CPU-bound task with threads vs processes and explain the result.
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30-min test
Job Readiness Assessment
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One-time payment · Python / AI Backend Engineer
What you get
- Role-specific readiness assessment (28 questions, 30 min)
- Overall readiness score and skill-wise breakdown
- Strengths and skill gaps across 7 core areas
- Personalised assessment report with answer explanations
How it works
- 1 Unlock it at checkout
- 2 Take the 28-question test (30 min)
- 3 Get your report instantly
Best for: Candidates who want to know exactly where they stand.
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Assessment + Personal Guidance
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₹99 assessment + ₹500 for a 30-minute one-to-one session
What you get
- Everything in the ₹99 assessment
- One-to-one review of your assessment results
- Identify your highest-priority skill gaps
- Guidance on what to learn and practise next
- Personalised next-step action plan
How it works
- 1 Pay ₹599 securely
- 2 Take the test and get your report
- 3 Review it one-to-one on Google Meet
Best for: Candidates who want a clear improvement roadmap.
Mentoring is guidance to help you improve, not a job guarantee.
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Personal Mentoring
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60-minute one-to-one session · No assessment required
What you get
- Deep-dive on your career and technical challenges
- Detailed review of your Python / backend skills and projects
- Interview preparation priorities and mock questions
- Written, personalised action plan after the session
How it works
- 1 Pay ₹999 securely
- 2 Pick a 60-minute slot
- 3 Meet on Google Meet, get a written plan
Best for: Candidates who already know what they need help with.
Mentoring is guidance to help you improve, not a job guarantee.
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Nagendra Kumar
IIT Delhi graduate · 10+ years
300+
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