12. Because Java byte code is the same on all computers, compiled Java programs a. are nonexistent b. must be re-compiled for each different machine before they can be run c. are highly portable d. cannot run on computers with different operating systems

C) Highly portable

Explanation:

This means they can run on any computer or platform that supports Java without the need for recompillation.

This idea is popularly called WORA that is Write Once Run Anywhere.

Software Applications written in Java are compiled to bytcode (.class) which are intended to run on the Java Virtual Machine (JVM) irrespective of the architecture of the computer or device.

a variable of array type holds a reference of object

array are commonly used in computer program to organize data so that a related set of values

array are using zero base indexing it start with 0.

all component of array have same type, two different types doesn't use in single array

if array are store 10 quantities its index value varies from 0 to 9.

it stores 1st quantity value in index value 0 and this process will same till index value 9.

sory but complete the question