To compile, and execute a program written in java, _______________ is required.Select one:a.JVMb.JDKc.JREd.JIT

The correct answer is b. JDK.

Here's why:

a. JVM (Java Virtual Machine) is the engine that runs the Java code. It converts bytecode into machine language. But it doesn't compile Java code, which is what the question is asking.

b. JDK (Java Development Kit) is the tool necessary to compile, document and package Java programs. The JDK includes the Java Runtime Environment (JRE) and an interpreter/loader (Java).

c. JRE (Java Runtime Environment) contains parts of the Java SE platform that implements Java programs. However, it doesn't include the tools for development like the Java compiler (javac) and others found in JDK.

d. JIT (Just-In-Time) compiler is a part of the JVM that improves the performance of Java applications by compiling bytecodes to native machine code at run time. But it's not responsible for compiling Java code into bytecode.

So, to compile and execute a program written in Java, you need JDK.