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Review Questions

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2.7

Which of the following lines are valid declarations?

Select the three correct answers.

  1. char a = '\u0061';

  2. char 'a' = 'a';

  3. char \u0061 = 'a';

  4. ch\u0061r a = 'a';

  5. ch'a'r a = 'a';

2.8

Given the following code within a method, which statement is true?

int a, b;
b = 5;

Select the one correct answer.

  1. Local variable a is not declared.

  2. Local variable b is not declared.

  3. Local variable a is declared but not initialized.

  4. Local variable b is declared but not initialized.

  5. Local variable b is initialized but not declared.

2.9

In which of these variable declarations will the variable remain uninitialized unless explicitly initialized?

Select the one correct answer.

  1. Declaration of an instance variable of type int.

  2. Declaration of a static variable of type float.

  3. Declaration of a local variable of type float.

  4. Declaration of a static variable of type Object.

  5. Declaration of an instance variable of type int[].



    		List of Figures
    		List of Tables
    		List of Examples
    		Foreword
    		Preface
    		Chapter 1. Basics of Java Programming
    		Chapter 2. Language Fundamentals
    		2.1 Basic Language Elements
    		Review Questions
    		2.2 Primitive Data Types
    		Review Questions
    		2.3 Variable Declarations
    		2.4 Initial Values for Variables
    		Review Questions
    		2.5 Java Source File Structure
    		Review Questions
    		2.6 The 'main()' Method
    		Review Questions
    		Chapter Summary
    		Programming Exercises
    		Chapter 3. Operators and Assignments
    		Chapter 4. Declarations and Access Control
    		Chapter 5. Control Flow, Exception Handling, and Assertions
    		Chapter 6. Object-oriented Programming
    		Chapter 7. Nested Classes And Interfaces
    		Chapter 8. Object Lifetime
    		Chapter 9. Threads
    		Chapter 10. Fundamental Classes
    		Chapter 11. Collections and Maps
    		Appendix A. Taking the SCPJ2 1.4 Exam
    		Appendix B. Objectives for the SCPJ2 1.4 Exam
    		Appendix C. Objectives for the Java 2 Platform Upgrade Exam
    		Appendix D. Annotated Answers to Review Questions
    		Appendix E. Solutions to Programming Exercises
    		Appendix F. Mock Exam
    		Appendix G. Number Systems and Number Representation
    		Appendix H. About the CD
    		Single-User License Agreement