Void defines the method which will not return any value. void: It is the return type of the method.In case, main is not made static then the compiler will throw an error as main() is called by the JVM before any objects are made and only static methods can be directly invoked via the class. main() is made static in Java so that it can be accessed without creating the instance of a Class. static: It is a keyword in java which identifies it is class-based.Public means that this Method will be accessible by any Class. public: Public is an access modifier, which is used to specify who can access this method.It is always written as public static void main(String args). Main() in Java is the entry point for any Java program. Explain public static void main(String args) in Java. JVM follows three notations: Specification, Implementation, and Runtime Instance. It’s an implementation of the JVM which physically exists. It is a specification that provides a run-time environment in which Java bytecode can be executed. JRE refers to a runtime environment in which Java bytecode can be executed. It is the tool necessary to compile, document and package Java programs. Explain JDK, JRE and JVM? JDK vs JRE vs JVM JDK C++ is a good choice for developing high-performance applications that require direct access to the operating system. In general, Java is a good choice for developing portable, secure, and easy-to-maintain applications. However, Java applications are typically more portable and secure than C++ applications. This is because Java uses a virtual machine, which adds an extra layer of abstraction between the code and the hardware. Performance: Java is typically not as fast as C++. For example, Java does not allow direct access to the operating system, which makes it more difficult for attackers to exploit security vulnerabilities. This is because Java has built-in security features that help to protect applications from malicious code. Safety: Java is a safer language than C++. This means that Java programmers do not need to worry about allocating and freeing memory, while C++ programmers need to be careful to manage memory correctly to avoid memory leaks. Memory management: Java uses automatic memory management, while C++ requires manual memory management. This means that Java code can run on any platform that has a Java virtual machine (JVM), while C++ code can only run on the platform that it was compiled for. Platform independence: Java is a platform-independent language, while C++ is a platform-dependent language. Java and C++ are both object-oriented programming languages, but they have some key differences. It is also a relatively easy language to learn, making it a good choice for beginners. Java is a powerful and versatile language that is well-suited for a wide range of tasks. Java is one of the most popular programming languages in the world, and is used in a wide variety of applications, including: It was released in May 1995 as a core component of Sun Microsystems’ Java platform. Java was originally developed by James Gosling at Sun Microsystems. Java applications are typically compiled to bytecode that can run on any Java virtual machine (JVM) regardless of the underlying computer architecture.

It is a general-purpose programming language intended to let programmers write once, run anywhere (WORA), meaning that compiled Java code can run on all platforms that support Java without the need to recompile. Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. Our expert team will get back to you at the earliest.īasic Java Interview Questions for Freshers Q1.

In case you attended any Java interview recently, or have additional questions beyond what we covered, we encourage you to post them in our QnA Forum. Here’s a definitive list of top Java Interview Questions that will guarantee a breeze-through to the next level. As a Java professional, it is essential to know the right buzzwords, learn the right technologies and prepare the right answers to commonly asked Java Programming Interview Questions.

Install javafx netbeans 12