Answer: A user authentication
 
        
             
        
        
        
<span>C electric power transmisson and electronics</span>
        
                    
             
        
        
        
Answer:
2. <em>A reference of type A can be treated as a reference of type B</em> - False
Base class or its objects are not related to their derived class (or its objects).
Explanation:
class A {
    int a;
    public A() {
        a = 7;
    } 
}
class B extends A {
    int b;
    public B() {
        b = 8; 
    } 
}
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1. <em>After the constructor for class B executes, the variable a will have the value 7 </em>- True.
When an object of a derived class is declared, the constructor of base class is called before the constructor of derived class (is called).
3. <em>Both variables a and b are instance variables </em>- True.
Classes can have instance, or member, variables and methods.
4.<em> After the constructor for class B executes, the variable b will have the value 8</em> - True.
When object of class B is declared, its constructor was called, which initialized variable b to 8.
 
        
             
        
        
        
Answer:
Printing Quality, Price, If it van vonnect to my laptop or nay devices.