A good answer might be:

No. Variables can be declared in the middle of a program. You should declare them in whatever location makes the program easiest to read.

A Run of the Program

Here (again) is a sample data file for the program, called student.data. 

3          
87
98
95
4          
78
82
91
84

Here is a sample run of the program. The user prompts have been left in: 

C:\users\default\JavaLessons>java TestGroups < student.data

How many students in group A:
Enter a number:
Enter a number:
Enter a number:
Group A average: 93.33333333333333
How many students in group B:
Enter a number:
Enter a number:
Enter a number:
Enter a number:
Group B average: 83.75

C:\users\default\JavaLessons>

QUESTION 12:

  1. How will the user indicate if group has no data in it?
  2. Will the program run correctly if either group has no data in it?