Quiz : OCA Java SE 8 methods and encapsulation practice

java 8 methods and encapsulation oca
Total Question : 5

In the exam, you must answer questions about methods and encapsulation. This Java quiz will help you get the correct answers by covering the following:

  • Defining the scope of variables.
  • Explaining an object’s life cycle.
  • Creating methods with primitive and object arguments and return values.
  • Creating overloaded methods and constructors.
  • Reading and writing to object fields.
  • Calling methods on objects.
  • Applying encapsulation principles to a class.

  1. Which option defines a well-encapsulated class?

     

  2. Examine the following code and select the correct option(s):

    public class Person {
    public int height;
    public void setHeight(int newHeight) {
        if (newHeight <= 300)
            height = newHeight;
    }
}

  3. Select the incorrect options

  4. Given the following code,

    class Course {
    void enroll(long duration) {
        System.out.println("long");
    }
    void enroll(int duration) {
        System.out.println("int");
    }
    void enroll(String s) {
        System.out.println("String");
    }    void enroll(Object o) {
        System.out.println("Object");
    }
}

    what is the output of the following code?

    class EJavaGuru {
    public static void main(String args[]) {
            Course course = new Course();
            char c = 10;
            course.enroll(c);
            course.enroll("Object");
    }
}

  5. Given  the  following  signature  of  method eJava,  choose  the  options  that  cor-rectly overload this method:


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