Java Programmer Certification Mock Exam

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Question 1

Which of the follow are true statements.

a.	A nested class is any class that is declared within the body of another class or interface.
b.	A nested class can not be declared within the body of an interface declaration.
c.	An inner class is a nested class that is not static.
d.	A nested class can not be declared static.
e.	A named class is any class that is not anonymous.

Question 2

Which of the follow are true statements.

a.	A local class is declared within a method, constructor or block.
b.	An anonymous class is always a local class.
c.	A local class is a nested class.
d.	A local class is a member class.
e.	A local class is always a named class.

Question 3

Which of the following are class modifiers? Select all that are applicable to a top-level class and all that are applicable to a nested class. It is not required that a modifier be applicable to both.

a.	abstract
b.	extends
c.	final
d.	implements
e.	private
f.	protected
g.	public
h.	static
i.	synchronized
j.	transient
k.	volatile

Question 4

Which of the following modifiers can be applied to a member class?

a.	abstract
b.	final
c.	public
d.	protected
e.	private
f.	static
g.	synchronized
h.	transient

Question 5

Which of the following modifiers can be applied to a local class?

a.	public
b.	protected
c.	private
d.	abstract
e.	static
f.	final

Question 6

class Z {
  abstract class A {}     // 1
  final class B {}        // 2
  private class C {}      // 3
  protected class D {}    // 4
  public class E {}       // 5
}

Which class declaration results in a compile-time error?

a.	1
b.	2
c.	3
d.	4
e.	5
f.	None of the above

Question 7

Which of the following is a true statement?

a.	An anonymous class can extend only the Object class.
b.	An anonymous class can not implement an interface.
c.	An anonymous class declaration can not have an implements clause.
d.	An anonymous class declaration can name more than one interface in the implements clause.
e.	The class instance creation expression for an anonymous class must never include arguments.
f.	None of the above

Question 8

class A {
  private static String s1 = "s1";
  final String s2 = "s2";
  A () { new Z("s5","s6");}
  class Z {
    final String s3 = "s3";
    String s4 = "s4";
    Z (final String s5, String s6) {
      System.out.print(???);
  }}
  public static void main(String args[]) {new A();}
}

Which variable can not be substituted for ??? without causing a compile-time error?

a.	s1
b.	s2
c.	s3
d.	s4
e.	s5
f.	s6
g.	None of the above

Question 9

Which of the following are true statements?

a.	An anonymous class is implicitly abstract.
b.	An anonymous class is implicitly final.
c.	An anonymous class is implicitly static.
d.	A static reference variable can reference an instance of an anonymous class.
e.	An anonymous class declaration must have at least one explicit constructor declaration.
f.	An anonymous class declaration can have more than one explicit constructor declaration.

Question 10

class B {
  private static String s1 = "s1";
  final String s2 = "s2";
  B () {new Z("s5","s6");}
  static class Z {
    final String s3 = "s3";
    static String s4 = "s4";
    Z (final String s5, String s6) {
      System.out.print(???);
  }}
  public static void main(String args[]) {new B();}
}

Which variable can not be substituted for ??? without causing a compile-time error?

a.	s1
b.	s2
c.	s3
d.	s4
e.	s5
f.	s6
g.	None of the above

Question 11

class C {
  private static String s1 = "s1";
  String s2 = "s2";
  C() {m1("s5","s6");}
  void m1(final String s5, String s6) {
    final String s3 = "s3"; String s4 = "s4";
    class Z {Z() {System.out.print(???);}}
    new Z();
  }
  public static void main(String args[]) {new C();}
}

Which variable names can be substituted for ??? without causing a compile-time error?

a.	s1
b.	s2
c.	s3
d.	s4
e.	s5
f.	s6