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JDK (Java Development Kit): A platform that provides tools for developing, testing, and running Java programs. JRE (Java Runtime Environment): A collection of libraries and software that allows Java programs to run. It's like a engine that powers the Java code. JRE is a part of JDK. JVM (Java Virtual Machine): A software that runs Java bytecode and manages memory. It's like a virtual engine that executes the Java code. JVM is a part of JRE. Think of it like a car: - JDK is the entire car (platform) - JRE is the engine (libraries and software) - JVM is the engine's cylinder (executes bytecode and manages memory) So, JDK > JRE > JVM

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Java Interview Questions Set-3

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Java Interview Questions Set-2

Q. What is Constructor Chaining in Java ? Ans:- Constructor chaining in Java is the process of calling one constructor from another constructor in the same class (using the this() keyword) or from a base class (using the super() keyword) . Here are some key points to know about constructor chaining in Java: Rules of constructor chaining: - The this() or super() expression should always be the first line of the constructor. - There should be at least one constructor without the this() keyword. - Constructor chaining can be achieved in any order. Types of constructor chaining in Java: - Within the same class (using this() keyword). - From a base class (using super() keyword). Benefits of constructor chaining: - Avoids duplicate code. - Makes code more readable. - Enables multiple tasksb in a single constructor. Alternative method: - Using init block, which is executed before any constructor.

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Q. Why is Java a platform independent language? Ans : Java language was developed in such a way that it does not depend on any hardware or software due to the fact that the compiler compiles the code and then converts it to platform-independent byte code which can be run on multiple systems. The only condition to run that byte code is for the machine to have a runtime environment (JRE) installed in it.

👨‍💻 SQL Quiz Which SQL keyword is used to remove duplicate records from a result set? A. UNIQUE B. DISTINCT C. DIFFERENT ⬇️ Guess the correct option in the comments!

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