OCA Java SE 8 Programmer I Certification Guide

3.12. Answers to sample exam questions

Q3-1.

Which option defines a well-encapsulated class?

1. class Template {
       public String font;
   }

2. class Template2 {
       public String font;
       public void setFont(String font) {
           this.font = font;
       }
       public String getFont() {
           return font;
       }
   }

3. class Template3 {
       private String font;
       public String author;
       public void setFont(String font) {
           this.font = font;
       }
       public String getFont() {
           return font;
       }
       public void setAuthor(String author) {
           this.author = author;
       }
       public String getAuthor() {
           return author;
       }
   }

4. None of the above

Answer: d

Explanation: Options (a), (b), and (c) are incorrect because they all define a public instance variable. A well-encapsulated class should be like a capsule, hiding its ...