What is the primary difference between a JDK and a JVM?

• A. JDK is for execution only; JVM is for development
• B. JDK includes a runtime environment; JVM does not
• C. JDK is used to compile Java source code; JVM only executes it
• D. JDK is platform independent; JVM is platform specific

Answer: (C)

The primary difference between a JDK and a JVM revolves around their specific roles in the Java development and execution process. The Java Development Kit (JDK) is a comprehensive toolset for developing Java applications, and includes various components such as the Java compiler, libraries, and the Java Virtual Machine (JVM) itself. Specifically, the JDK is responsible for compiling Java source code (written in files with a .java extension) into bytecode (in .class files) that the JVM can understand and execute.

On the other hand, the JVM's role is to interpret and execute this bytecode. It is the environment where bytecode runs, managing system resources and providing the necessary runtime environment for Java applications. Thus, saying that the JDK is used to compile Java source code and the JVM only executes it accurately captures their distinct purposes.

The other options do not properly represent the key differences. The misconception about execution and development roles creates confusion regarding the JDK and JVM's functionalities. The idea that the JDK includes a runtime environment while the JVM does not overlooks the fact that the JVM is inherently part of the runtime environment for executing Java applications. Additionally, characterizing the JDK as platform independent while the JVM is platform specific misses the essential