OCA / OCP Java SE 8 Programmer Practice Tests

Chapter 2Working with Java Data Types

THE OCA EXAM TOPICS COVERED IN THIS PRACTICE TEST INCLUDE THE FOLLOWING:

• Working with Java Data Types
  • Declare and initialize variables (including casting of primitive data types)
  • Differentiate between object reference variables and primitive variables
  • Know how to read or write to object fields
  • Explain an Object’s Lifecycle (creation, “dereference by reassignment” and garbage collection)
  • Develop code that uses wrapper classes such as Boolean, Double, and Integer

1. Which of the following declarations does not compile?

   1. double num1, int num2 = 0;
   2. int num1, num2;
   3. int num1, num2 = 0;
   4. int num1 = 0, num2 ...