1. What is JDK, JVM, JRE.

Question

Accepted Answer

JDK is a development kit, JRE is a runtime environment, and JVM is a virtual machine for executing Java code.

JDK includes JRE and development tools like javac and java
JRE includes JVM and necessary libraries to run Java applications
JVM is responsible for interpreting Java bytecode and executing it
Example: JDK 8 includes JRE 8 and development tools like javac and java
Example: JRE 8 includes JVM 8 and necessary libraries to run Java applications

Accepted Answer

Java Devolopement Kit (It is used to Devolope The kit) Java Virtual Machine (It is used to Java source code ) Java Runtime Environment (It is used to Lime jvm Execution)

Accepted Answer

Java Development Kit

Java Virtual Machine

Java Runtime Environment

Accepted Answer

Java Develop Kid, Java Virtual, Java Runtime Environment

Accepted Answer

JDK is java development kit it contains all library files and utilities to develop java software

Machine (JVM) + Libraries to run the application. JVM = Only Runtime

JRE stands for Java Runtime Environment. It is a package that contains everything you need to run a Java program, including the JVM, the Java class libraries, and other support files. It does not include tools for developing Java applications, only for running them

Accepted Answer

JDK is java development kit it contains all library files and utilities to develop java software

Machine (JVM) + Libraries to run the application. JVM = Only Runtime

Java Runtime Environment (JRE) is an open-access software distribution that has a Java class library,

Accepted Answer

JDK stands for Java Development Kit. It is a software development kit that includes everything you need to develop Java applications. It includes the Java Runtime Environment (JRE), as well as tools for developing, debugging, and monitoring Java applications.

JVM stands for Java Virtual Machine. It is a virtual machine that executes Java bytecode. When you run a Java program, the JVM reads the bytecode and translates it into instructions that the computer can understand and execute.

JRE stands for Java Runtime Environment. It is a package that contains everything you need to run a Java program, including the JVM, the Java class libraries, and other support files. It does not include tools for developing Java applications, only for running them.

Accepted Answer

java development kit java virtual machine java runtime environment

Accepted Answer

JDK is java development kit it contains all library files and utilities to develop java software

JVM is java virtual machine has responsible to execute the java program

JRE is Java runtime environment setup provided to run the java program.

Accepted Answer

Java Development Kit (JDK) is a software development environment which is used to develop java applications and applets.

Java virtual machine Java Code or applications. It converts Java bytecode into machines languages

Java Runtime Environment (JRE) is an open-access software distribution that has a Java class library,

Accepted Answer

Java Development Kit (JDK) is a software development environment which is used to develop java applications and applets.

Java virtual machine Java Code or applications. It converts Java bytecode into machines languages

Java Runtime Environment (JRE) is an open-access software distribution that has a Java class library,

Accepted Answer

JVM (java virtual machine) is a specification designed by sun microsystems that provide the runtime environment to run the java bytecode it can also run the programs written in other programming languages by first converting them into java bytecode.JVM is available for various hardware and software platforms(almost all). This versatility of the JVM makes java a platform-independent language i.e; any OS with JVM installed over it can obviously run the java bytecode. Whenever we write the java command on the command prompt an instance of the JVM is created to run the java class.

eg:- A code written on a windows os can be transferred and run over Linux OS, ETC.

The JVM performs the following main tasks:

Loads code
Verifies code
Executes code
Provides runtime environment

JRE (Acronym for JAVA runtime environment). it is the set of software tools used to develop a JAVA application.it consists of a set of libraries, jar files, and other supporting files that are utilized i.e it physically exists whereas, whereas JVM is just a virtual concept its existence depends on its implementation for an algorithm. There, have been various new implementations(versions) of java that have been released by different providers other than Oracle but it's always based on the specification provided by oracle.

JDK(Java Development Kit) is a runtime environment consisting of both JRE and private JVM and various other development tools like the interpreter/loader(java), an archiver(jar), a compiler(javac), a documentation generator(JavaDoc), etc to complete the development of java applications and applets. It has physical existence, unlike JVM.

JDK is an implementation of any one of the below given Java Platforms released by Oracle Corporation:

Standard Edition Java Platform: java SE is a computing platform for the development and deployment of portable code for desktop and server environments.
Enterprise EditionJava Platform: it is a popular platform that provides APIs and a runtime environment for scripting and running enterprise software.
Micro Edition Java Platform: since it's embedded into microchips it is also known as embedded systems. It supports lightweight applications where we use only 130 kb to implement java technologies as it provides various weight-cutting features so that our application can be embedded on smart cards or sensors.

Accepted Answer

JVM (java virtual machine) is a specification designed by sun microsystems that provide the runtime environment to run the java bytecode it can also run the programs written in other programming languages by first converting them into java bytecode.JVM is available for various hardware and software platforms(almost all). This versatility of the JVM makes java a platform-independent language i.e; any OS with JVM installed over it can obviously run the java bytecode. Whenever we write the java command on the command prompt an instance of the JVM is created to run the java class.

eg:- A code written on a windows os can be transferred and run over Linux OS, ETC.

The JVM performs the following main tasks:

Loads code
Verifies code
Executes code
Provides runtime environment

JRE (Acronym for JAVA runtime environment). it is the set of software tools used to develop a JAVA application.it consists of a set of libraries, jar files, and other supporting files that are utilized i.e it physically exists whereas, whereas JVM is just a virtual concept its existence depends on its implementation for an algorithm. There, have been various new implementations(versions) of java that have been released by different providers other than Oracle but it's always based on the specification provided by oracle.

JDK(Java Development Kit) is a runtime environment consisting of both JRE and private JVM and various other development tools like the interpreter/loader(java), an archiver(jar), a compiler(javac), a documentation generator(JavaDoc), etc to complete the development of java applications and applets. It has physical existence, unlike JVM.

JDK is an implementation of any one of the below given Java Platforms released by Oracle Corporation:

Standard Edition Java Platform: java SE is a computing platform for the development and deployment of portable code for desktop and server environments.
Enterprise EditionJava Platform: it is a popular platform that provides APIs and a runtime environment for scripting and running enterprise software.
Micro Edition Java Platform: since it's embedded into microchips it is also known as embedded systems. It supports lightweight applications where we use only 130 kb to implement java technologies as it provides various weight-cutting features so that our application can be embedded on smart cards or sensors.

Accepted Answer

JDK = Java Runtime Environment (JRE) + Development tools. JRE = Java Virtual Machine (JVM) + Libraries to run the application. JVM = Only Runtime environment for executing the Java byte code. Mahesh Parahar.

1. What is JDK, JVM, JRE.

Top TCS Java Developer interview questions & answers

Popular interview questions of Java Developer

Top HR questions asked in TCS Java Developer