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Difference between list and tuple in python 🔸List is mutable ( you can modify the original list) and it's values are written in sqare brackets [ ] 🔸Tuple is immutable ( you can't modify it) and it's values are written in parentheses ( ) delimited by comma( , ) 🔸To convert list to tuple - we use tuple() function list1 = [1,2,3] print(tuple(list1)) Output : (1,2,3) 🔸 For single element list list1 = [1] print(tuple(list1)) Output : (1, ) ▪️a tuple is a tuple because of comma not because of parentheses

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Typical java interview questions sorted by experience Junior * Name some of the characteristics of OO programming languages * What are the access modifiers you know? What does each one do? * What is the difference between overriding and overloading a method in Java? * What’s the difference between an Interface and an abstract class? * Can an Interface extend another Interface? * What does the static word mean in Java? * Can a static method be overridden in Java? * What is Polymorphism? What about Inheritance? * Can a constructor be inherited? * Do objects get passed by reference or value in Java? Elaborate on that. * What’s the difference between using == and .equals on a string? * What is the hashCode() and equals() used for? * What does the interface Serializable do? What about Parcelable in Android? * Why are Array and ArrayList different? When would you use each? * What’s the difference between an Integer and int? * What is a ThreadPool? Is it better than using several “simple” threads? * What the difference between local, instance and class variables? Mid * What is reflection? * What is dependency injection? Can you name a few libraries? (Have you used any?) * What are strong, soft and weak references in Java? * What does the keyword synchronized mean? * Can you have “memory leaks” on Java? * Do you need to set references to null on Java/Android? * What does it means to say that a String is immutable? * What are transient and volatile modifiers? * What is the finalize() method? * How does the try{} finally{} works? * What is the difference between instantiation and initialisation of an object? * When is a static block run? * Why are Generics are used in Java? * Can you mention the design patterns you know? Which of those do you normally use? * Can you mention some types of testing you know? Senior * How does Integer.parseInt() works? * Do you know what is the “double check locking” problem? * Do you know the difference between StringBuffer and StringBuilder? * How is a StringBuilder implemented to avoid the immutable string allocation problem? * What does Class.forName method do? * What is Autoboxing and Unboxing? * What’s the difference between an Enumeration and an Iterator? * What is the difference between fail-fast and fail safe in Java? * What is PermGen in Java? * What is a Java priority queue? * *s performance influenced by using the same number in different types: Int, Double and Float? * What is the Java Heap? * What is daemon thread? * Can a dead thread be restarted? Source: medium.

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SQL Joins ✅

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🔰 C++ Roadmap for Beginners 2025 ├── 🧠 Introduction to C++ & How It Works ├── 🧰 Setting Up Environment (IDE, Compiler) ├── 📝 Basic Syntax & Structure ├── 🔢 Variables, Data Types & Constants ├── ➕ Operators (Arithmetic, Relational, Logical, Bitwise) ├── 🔁 Flow Control (if, else, switch) ├── 🔄 Loops (for, while, do...while) ├── 🧩 Functions (Declaration, Definition, Recursion) ├── 📦 Arrays, Strings & Vectors ├── 🧱 Pointers & References ├── 🧮 Dynamic Memory Allocation (new, delete) ├── 🏗 Structures & Unions ├── 🏛 Object-Oriented Programming (Classes, Objects, Inheritance, Polymorphism) ├── 📂 File Handling in C++ ├── ⚠️ Exception Handling ├── 🧠 STL (Standard Template Library - vector, map, set, etc.) ├── 🧪 Mini Projects (Bank System, Student Record, etc.) Like for the detailed explanation ❤️ #c #programming