Which of the following is used to find and fix bugs in the Java programs? a. JVM b. JRE c. JDK d. JDB

The correct answer is d. JDB.

JDB stands for Java Debugger, it is a tool included with the Java Development Kit (JDK) and is used for debugging Java code. It helps in finding and fixing bugs in Java programs.

Here's a brief explanation of all the options:

a. JVM (Java Virtual Machine) - It is an abstract machine that enables your computer to run a Java program.

b. JRE (Java Runtime Environment) - It is a software package that contains what is required to run a Java program. It includes the JVM, core libraries, and other additional components to run applications and applets written in Java.

c. JDK (Java Development Kit) - It is a software development environment used for developing Java applications and applets. It includes the JRE, an interpreter/loader (java), a compiler (javac), an archiver (jar), a documentation generator (javadoc), and other tools needed in Java development.

d. JDB (Java Debugger) - It is a command-line debugging tool, which can be used to find and fix bugs in Java programs.