🎯 TOP 15 Python Interview Questions Asked in 2026
(TCS • Infosys • Wipro • Startups — ye sab poochte hain!)

Save karo — interview se pehle zaroor padho! 📌

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BASICS (Freshers ke liye must!)

1️⃣ List vs Tuple?
→ List = mutable | Tuple = immutable
→ Tuple is faster & used for fixed data

2️⃣ What are Python decorators?
→ Functions jo dusre functions wrap karte hain
→ @staticmethod, @classmethod, @property
→ Flask mein @app.route bhi ek decorator hai

3️⃣ deepcopy vs shallow copy?
→ Shallow = reference copy (nested objects share)
→ Deep = completely new independent copy
→ import copy → copy.deepcopy(obj)

4️⃣ What is GIL in Python?
→ Global Interpreter Lock
→ Only ONE thread runs at a time in CPython
→ Use multiprocessing for true parallelism

5️⃣ What are generators?
→ Use yield instead of return
→ Memory efficient — values on demand
→ Perfect for large datasets

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INTERMEDIATE (Most asked in tech rounds!)

6️⃣ List comprehension vs map() — which is faster?
→ List comprehension is more readable & Pythonic
→ map() slightly faster for simple functions

7️⃣ What is *args and **kwargs?
→ *args = variable positional arguments
→ **kwargs = variable keyword arguments

8️⃣ Mutable vs Immutable data types?
→ Mutable: list, dict, set
→ Immutable: int, str, tuple, float

9️⃣ What is __init__ vs __new__?
→ __new__ creates the object
→ __init__ initializes it (constructor)

🔟 Python memory management?
→ Reference counting + Garbage collector
→ del keyword decrements reference count

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ADVANCED (For senior/experienced roles!)

1️⃣1️⃣ Lambda function?
→ Anonymous one-line function
→ square = lambda x: x**2

1️⃣2️⃣ OOPS in Python?
→ Class, Object, Inheritance, Polymorphism
→ Always give a real example (Bank, Car etc.)

1️⃣3️⃣ is vs == difference?
→ == checks value | is checks memory identity
→ [] == [] is True but [] is [] is False!

1️⃣4️⃣ Exception handling?
→ try / except / else / finally
→ Always catch specific exceptions first

1️⃣5️⃣ @staticmethod vs @classmethod?
→ @staticmethod: no self or cls — utility method
→ @classmethod: gets class as first arg (cls)

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🔥 BONUS Interview Tips:
→ Always explain with a real-world example
→ Say 'I used this in my project' — instant +1!
→ Mention time/space complexity when possible
→ If unsure — explain what you DO know confidently

📂 Get Python Projects with Source Code:
👉 https://t.me/Projectwithsourcecodes

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INTERVIEW PREP 2026 — Most Asked Questions!
Asked in TCS, Infosys, Wipro, Accenture & Startups

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JAVA / OOP QUESTIONS

Q1: What is the difference between Abstract Class and Interface?
ANS: Abstract class can have method body + constructor.
Interface has only abstract methods (before Java 8).
Use abstract class for IS-A, interface for CAN-DO.

Q2: What is method overloading vs overriding?
ANS: Overloading = same method name, different params (compile time)
Overriding = child class redefines parent method (runtime)

Q3: What is a NullPointerException? How to avoid it?
ANS: Accessing object/method on null reference.
Fix: Use Optional<>, null checks, or @NotNull annotation.

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DATABASE (SQL) QUESTIONS

Q4: Difference between WHERE and HAVING?
ANS: WHERE filters rows BEFORE grouping.
HAVING filters groups AFTER GROUP BY.
WHERE cannot use aggregate functions. HAVING can.

Q5: What are ACID properties?
ANS: A - Atomicity (all or nothing)
C - Consistency (valid state always)
I - Isolation (transactions don't interfere)
D - Durability (committed = permanent)

Q6: What is the difference between INNER JOIN and LEFT JOIN?
ANS: INNER JOIN = only matching rows from both tables
LEFT JOIN = all rows from left + matching from right

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HR ROUND QUESTIONS

Q7: Tell me about yourself?
FORMULA: Name + Degree + Skills + Project + Goal
EXAMPLE: 'I am [Name], pursuing BCA final year.
I am skilled in Java, React and SQL.
I built a Student Management System using Spring Boot.
I am looking to join a company where I can grow as
a full stack developer.'

Q8: Why should we hire you?
TIP: Mention 1 specific skill + 1 project + 1 soft skill
'I know React + Node JS, I have built 3 live projects,
and I learn fast and work well in teams.'

Q9: What is your biggest weakness?
SMART ANSWER: Turn it into a strength!
'I used to spend too much time perfecting code.
Now I set time limits and focus on working solutions first.'

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BONUS TIPS TO CRACK TECH INTERVIEWS

-> Practice 2 LeetCode Easy problems daily
-> Revise OOPS concepts every week
-> Always explain your thinking out loud
-> Have 2-3 projects ready to explain in detail
-> Ask 1 smart question at the end of interview
-> Dress formally even for online interviews!

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Want FREE projects to show in your interview?
Get full source code here:
https://t.me/Projectwithsourcecodes

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