Certified Java Programmer Mock Exam

Question 1

package com.dan.chisholm;
public class A {
  public void m1() {System.out.print("A.m1, ");}
  protected void m2() {System.out.print("A.m2, ");}
  private void m3() {System.out.print("A.m3, ");}
  void m4() {System.out.print("A.m4, ");}
}  
class B {
  public static void main(String[] args) {
    A a = new A();
    a.m1();  // 1
    a.m2();  // 2
    a.m3();  // 3
    a.m4();  // 4
}}

Assume that the code appears in a single file named A.java. What is the result of attempting to compile and run the program?

Question 2

// Class A is declared in a file named A.java.
package com.dan.chisholm;
public class A {
  public void m1() {System.out.print("A.m1, ");}
  protected void m2() {System.out.print("A.m2, ");}
  private void m3() {System.out.print("A.m3, ");}
  void m4() {System.out.print("A.m4, ");}
}
// Class D is declared in a file named D.java.
package com.dan.chisholm.other;
import com.dan.chisholm.A;
public class D {
  public static void main(String[] args) {
    A a = new A();
    a.m1();  // 1
    a.m2();  // 2
    a.m3();  // 3
    a.m4();  // 4
}}

What is the result of attempting to compile and run the program?

Question 3

// Class A is declared in a file named A.java.
package com.dan.chisholm;
public class A {
   public void m1() {System.out.print("A.m1, ");}
   protected void m2() {System.out.print("A.m2, ");}
   private void m3() {System.out.print("A.m3, ");}
   void m4() {System.out.print("A.m4, ");}
}
// Class C is declared in a file named C.java.
package com.dan.chisholm.other;
import com.dan.chisholm.A;
public class C extends A {
  public static void main(String[] args) {
    C c = new C();
    c.m1();  // 1
    c.m2();  // 2
    c.m3();  // 3
    c.m4();  // 4
}}

What is the result of attempting to compile and run the program?