Junior Python Interview: How to Avoid Getting Lost on Clarifying Questions
A new mock interview for a Python developer: a live conversation with candidate Chingis and my comments. If you're preparing for an interview, want to understand common mistakes, and "how the interviewer thinks," this episode is for you.
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What the video is about
• How to choose between for and while
• Namespaces vs. scopes
• List comprehension: what happens to scope
• Closures with a clear example (outer/inner)
• pass and alternatives
• What None really is and where it's appropriate to use it
• Candidate feedback: why it's important to answer "why" and not just "how"
Who is it for
• Junior and middle programmers preparing for Python interviews
• Anyone who wants to systematize the theory
Timecodes
00:00 — Introduction and introduction
02:43 — Interview format and rules
04:41 — Question 1: What loops are there in Python?
06:06 — What's the difference between for and while?
07:46 — When should I use for and when should I use while?
12:33 — Question 2: What is a namespace?
14:06 — Are namespaces and scopes the same thing?
17:05 — How to create a new namespace?
19:20 — Namespaces in list comprehension
20:43 — Code review: nested functions and closures
22:00 — How does accessing an outer function variable work?
26:47 — Running the code — what will be returned?
29:11 — Question 3: What is a closure and why is it needed?
36:47 — Question 4: What does pass do? Can it be replaced?
43:19 — Question 5: What is None?
45:44 — None as an object — an instance of what class?
47:05 — Philosophical question: if everything in Python is an object, where do they come from? 53:39 — Wrapping up, moving on to feedback
54:17 — Feedback from the candidate: self-assessment
55:52 — Feedback from the interviewer: what you liked
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Useful links:
• Python interview preparation — https://habr.com/ru/companies/yandex_...
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#python #interview #interview #junior #backend #loops #scope #closure #listcomprehension #None #pass #ITcareer #interviewpreparation