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Hey guys, only 150 sheets are left 😪. If you haven’t enrolled yet to learn Java from basic to advanced, then do it quickly👇 And If you want 🎁Free Goodies + Free Certificate + Project Files + Live Q&A 🔗, then choose "Maharashtra" as your state ❤️ Register now for free 🤩 :- https://forms.gle/eMMPc3Rsioe9xj699

✅ 100+ Must-Know Java Concepts for Interviews ☕💡 📍 Java Basics 1.What is Java? 2.JVM, JRE, JDK 3.Data Types & Variables 4.Operators 5.Type Casting 6.Wrapper Classes 7.Autoboxing & Unboxing 8.Enum Types 9.Varargs (...) 10.Final Keyword 📍 Control Flow 11.if–else 12.switch–case 13.for, while, do-while loops 14.break & continue 15.Ternary operator 📍 Object-Oriented Programming (OOP) 16.Class & Object 17.Inheritance 18.Polymorphism (compile-time & runtime) 19.Abstraction 20.Encapsulation 21.Inner & Nested Classes 22.Anonymous Classes 23.Packages & Access Modifiers 📍 Core OOP Concepts 24.Method Overloading 25.Method Overriding 26.Constructors & Constructor Overloading 27.this & super 28.Static Keyword 29.Object Class Methods (equals, hashCode, toString) 30.Creating Immutable Classes 📍 Exception Handling 31.try–catch–finally 32.throw vs throws 33.Checked vs Unchecked Exceptions 34.Custom Exceptions 35.Common Exceptions 📍 Collections Framework 36.List, Set, Map 37.ArrayList vs LinkedList 38.HashSet vs TreeSet 39.HashMap vs TreeMap 40.LinkedHashSet & LinkedHashMap 41.Iterator & Enhanced for-loop 42.PriorityQueue 43.Generics 44.Comparable vs Comparator 45.Collections Utility Class 46.Fail-Fast vs Fail-Safe Iterators 47.ConcurrentHashMap 📍 Strings & Arrays 48.String vs StringBuilder vs StringBuffer 49.Common String Methods 50.1D & 2D Arrays 51.Array vs ArrayList 52.String Immutability 📍 Advanced Java Concepts 53.Interfaces vs Abstract Classes 54.Lambda Expressions 55.Functional Interfaces 56.Streams API 57.Map–Filter–Reduce 58.Optional Class 59.Method References 60.Parallel Streams 61.File Handling 62.Serialization & Deserialization 63.transient Keyword 64.NIO & NIO2 65.Working with Paths & Files 📍 Java Memory & JVM Internals 66.Heap vs Stack 67.Java Memory Model 68.Classloader Mechanism 69.Garbage Collection Basics 70.GC Algorithms 71.Memory Leaks 72.Strong, Weak, Soft & Phantom References 📍 Multithreading & Concurrency 73.Thread vs Runnable 74.Thread Lifecycle 75.Synchronization 76.wait(), notify(), notifyAll() 77.Thread Pools 78.Callable & Future 79.Executor Framework 80.Deadlock, Livelock, Starvation 81.ReentrantLock 82.Volatile Keyword 83.Atomic Classes 84.Concurrent Package Basics 📍 Java 8+ Features 85.LocalDate, LocalTime, LocalDateTime 86.Default & Static Methods in Interfaces 87.Collectors Class 88.var Keyword 89.Records 90.Sealed Classes 📍 JDBC & Databases 91.JDBC Architecture 92.Connection, Statement, PreparedStatement 93.ResultSet Handling 94.SQL Injection Prevention 95.Connection Pooling 📍 Spring & Enterprise Basics 96.Spring Core 97.Spring Boot Basics 98.REST API Basics 99.Dependency Injection 100.Microservices Overview 📍 Best Practices & Tools 101.Writing Clean Code 102.Unit Testing (JUnit) 103.Git & GitHub Basics

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Hey guys, only 150 sheets are left 😪. If you haven’t enrolled yet to learn Java from basic to advanced, then do it quickly👇 And If you want 🎁Free Goodies + Free Certificate + Project Files + Live Q&A 🔗, then choose "Maharashtra" as your state ❤️ Register now for free 🤩 :- https://forms.gle/eMMPc3Rsioe9xj699

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🔁 *Top 10 Python Built-in Functions You Should Know 💡🐍*

nums = [1, 2, 3, 4, 5]

*1. len()* – *Get length* › len(nums) → 5 *2. type()* – *Check data type* › type(nums) → <class 'list'> *3. sum()* – *Get total sum* › sum(nums) → 15 *4. max() / min()* – *Get largest/smallest* › max(nums) → 5 › min(nums) → 1 *5. sorted()* – *Return sorted list* › sorted(nums, reverse=True) → [5, 4, 3, 2, 1] *6. range()* – *Generate number sequence* › list(range(3)) → [0, 1, 2] *7. enumerate()* – *Get index & value in loops* › for i, v in enumerate(nums): → print(i, v) *8. zip()* – *Combine iterables* › zip([1,2], ['a','b']) → [(1, 'a'), (2, 'b')] *9. input()* – *Take user input* › name = input("Enter name: ") *10. isinstance()* – *Check if variable is a type* › isinstance(nums, list) → True 💡 *Bonus Tip:* Use help(function) to understand any built-in function quickly! 💬 *Tap ❤️ for more!*

🔁 Top 10 Python Built-in Functions You Should Know 💡🐍

nums = [1, 2, 3, 4, 5]

1. len() – Get length › len(nums) → 5 2. type() – Check data type › type(nums) → <class 'list'> 3. sum() – Get total sum › sum(nums) → 15 4. max() / min() – Get largest/smallest › max(nums) → 5 › min(nums) → 1 5. sorted() – Return sorted list › sorted(nums, reverse=True) → [5, 4, 3, 2, 1] 6. range() – Generate number sequence › list(range(3)) → [0, 1, 2] *7. enumerate()* – *Get index & value in loops* › for i, v in enumerate(nums): → print(i, v) 8. zip() – Combine iterables › zip([1,2], ['a','b']) → [(1, 'a'), (2, 'b')] 9. input() – Take user input › name = input("Enter name: ") 10. isinstance() – Check if variable is a type › isinstance(nums, list) → True 💡 Bonus Tip: Use help(function) to understand any built-in function quickly! 💬 *Tap ❤️ for more!*

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