The pages of this web site are not formatted to conserve paper, but my new book (ISBN: 0-9745862-0-X) is formatted to save paper, save your printer cartridge, save a loose-leaf binder, and save money. If you prefer to work my exams from printed pages, then give your printer a rest and buy my new book.
Today, you can find my book at amazon.com.
If you have any questions or comments concerning my mock exams or my book, then please send an e-mail to me at scjpexam2000@yahoo.com.
class A {void m1(A a) {System.out.print("A");}}
class B extends A {void m1(B b) {System.out.print("B");}}
class C extends B {void m1(C c) {System.out.print("C");}}
class D extends C {
void m1(D d) {System.out.print("D");}
public static void main(String[] args) {
A a1 = new A(); B b1 = new B(); C c1 = new C(); D d1 = new D();
d1.m1(a1); d1.m1(b1); d1.m1(c1);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: AAA |
| b. | Prints: ABC |
| c. | Prints: DDD |
| d. | Prints: ABCD |
| e. | Compile-time error |
| f. | Run-time error |
| g. | None of the above |
class GFC215 {
static String m(float i) {return "float";}
static String m(double i) {return "double";}
public static void main (String[] args) {
int a1 = 1; long b1 = 2; System.out.print(m(a1)+","+ m(b1));
}}
What is the result of attempting to compile and run the program?
| a. | Prints: float,float |
| b. | Prints: float,double |
| c. | Prints: double,float |
| d. | Prints: double,double |
| e. | Compile-time error |
| f. | Run-time error |
| g. | None of the above |
class A {} class B extends A {} class C extends B {}
class D {
void m1(A a) {System.out.print("A");}
void m1(B b) {System.out.print("B");}
void m1(C c) {System.out.print("C");}
public static void main(String[] args) {
A c1 = new C(); B c2 = new C(); C c3 = new C(); D d1 = new D();
d1.m1(c1); d1.m1(c2); d1.m1(c3);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: AAA |
| b. | Prints: ABC |
| c. | Prints: CCC |
| d. | Compile-time error |
| e. | Run-time error |
| f. | None of the above |
class GFC216 {
static String m(float i) {return "float";}
static String m(double i) {return "double";}
public static void main (String[] args) {
char a1 = 1; long b1 = 2; System.out.print(m(a1)+","+ m(b1));
}}
What is the result of attempting to compile and run the program?
| a. | Prints: float,float |
| b. | Prints: float,double |
| c. | Prints: double,float |
| d. | Prints: double,double |
| e. | Compile-time error |
| f. | Run-time error |
| g. | None of the above |
class A {void m1(A a) {System.out.print("A");}}
class B extends A {void m1(B b) {System.out.print("B");}}
class C extends B {void m1(C c) {System.out.print("C");}}
class D {
public static void main(String[] args) {
A c1 = new C(); B c2 = new C(); C c3 = new C(); C c4 = new C();
c4.m1(c1); c4.m1(c2); c4.m1(c3);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: AAA |
| b. | Prints: ABC |
| c. | Prints: CCC |
| d. | Compile-time error |
| e. | Run-time error |
| f. | None of the above |
class GFC217 {
static String m(int i) {return "int";}
static String m(float i) {return "float";}
public static void main (String[] args) {
long a1 = 1; double b1 = 2; System.out.print(m(a1)+","+ m(b1));
}}
What is the result of attempting to compile and run the program?
| a. | Prints: float,float |
| b. | Prints: float,double |
| c. | Prints: double,float |
| d. | Prints: double,double |
| e. | Compile-time error |
| f. | Run-time error |
| g. | None of the above |
class A {void m1(A a) {System.out.print("A");}}
class B extends A {void m1(B b) {System.out.print("B");}}
class C extends B {void m1(C c) {System.out.print("C");}}
class D {
public static void main(String[] args) {
A c1 = new C(); C c2 = new C(); c1.m1(c2);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: A |
| b. | Prints: B |
| c. | Prints: C |
| d. | Compile-time error |
| e. | Run-time error |
| f. | None of the above |
class GFC218 {
static void m(Object x) {System.out.print("Object");}
static void m(String x) {System.out.print("String");}
public static void main(String[] args) {m(null);}
}
What is the result of attempting to compile and run the program?
| a. | Prints: Object |
| b. | Prints: String |
| c. | Compile-time error |
| d. | Run-time error |
| e. | None of the above |
class A {void m1(A a) {System.out.print("A");}}
class B extends A {void m1(B b) {System.out.print("B");}}
class C extends B {void m1(C c) {System.out.print("C");}}
class D {
public static void main(String[] args) {
A a1 = new A(); A b1 = new B(); A c1 = new C(); C c4 = new C();
a1.m1(c4); b1.m1(c4); c1.m1(c4);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: AAA |
| b. | Prints: ABC |
| c. | Prints: CCC |
| d. | Compile-time error |
| e. | Run-time error |
| f. | None of the above |
class GFC200 {}
class GFC201 {
static void m(Object x) {System.out.print("Object");}
static void m(String x) {System.out.print("String");}
static void m(GFC200 x) {System.out.print("GFC200");}
public static void main(String[] args) {m(null);}
}
What is the result of attempting to compile and run the program?
| a. | Prints: Object |
| b. | Prints: String |
| c. | Prints: GFC200 |
| d. | Compile-time error |
| e. | Run-time error |
| f. | None of the above |
class A {void m1(A a) {System.out.print("A");}}
class B extends A {void m1(B b) {System.out.print("B");}}
class C extends B {void m1(C c) {System.out.print("C");}}
class D {
public static void main(String[] args) {
A a1 = new A(); B b1 = new B(); C c1 = new C(); A c2 = new C();
c2.m1(a1); c2.m1(b1); c2.m1(c1);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: AAA |
| b. | Prints: ABC |
| c. | Prints: CCC |
| d. | Compile-time error |
| e. | Run-time error |
| f. | None of the above |
class GFC202 {} class GFC203 extends GFC202 {}
class GFC204 {
static void m(GFC202 x) {System.out.print("GFC202");}
static void m(GFC203 x) {System.out.print("GFC203");}
public static void main(String[] args) {m(null);}
}
What is the result of attempting to compile and run the program?
| a. | Prints: GFC202 |
| b. | Prints: GFC203 |
| c. | Compile-time error |
| d. | Run-time error |
| e. | None of the above |
class A {void m1(A a) {System.out.print("A");}}
class B extends A {void m1(B b) {System.out.print("B");}}
class C extends B {void m1(C c) {System.out.print("C");}}
class D {
public static void main(String[] args) {
A a1 = new A(); B b1 = new A(); C c1 = new A(); C c2 = new C();
c2.m1(a1); c2.m1(b1); c2.m1(c1);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: AAA |
| b. | Prints: ABC |
| c. | Prints: CCC |
| d. | Compile-time error |
| e. | Run-time error |
| f. | None of the above |
class GFC205 {} class GFC206 extends GFC205 {}
class GFC207 extends GFC206 {
static void m(GFC205 x, GFC205 y) {System.out.print("GFC205,GFC205");}
static void m(GFC205 x, GFC206 y) {System.out.print("GFC205,GFC206");}
static void m(GFC206 x, GFC205 y) {System.out.print("GFC206,GFC205");}
static void m(GFC206 x, GFC206 y) {System.out.print("GFC206,GFC206");}
public static void main(String[] args) {
GFC207 gfc207 = new GFC207(); m(gfc207, gfc207);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: GFC205,GFC205 |
| b. | Prints: GFC205,GFC206 |
| c. | Prints: GFC206,GFC205 |
| d. | Prints: GFC206,GFC206 |
| e. | Compile-time error |
| f. | Run-time error |
| g. | None of the above |
class A {void m1(A a) {System.out.print("A");}}
class B extends A {void m1(B b) {System.out.print("B");}}
class C extends B {void m1(C c) {System.out.print("C");}}
class D {
public static void main(String[] args) {
A a1 = new A(); B b1 = new B(); C c1 = new C(); C c2 = new A();
c2.m1(a1); c2.m1(b1); c2.m1(c1);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: AAA |
| b. | Prints: ABC |
| c. | Prints: CCC |
| d. | Compile-time error |
| e. | Run-time error |
| f. | None of the above |
class GFC211 {} class GFC212 extends GFC211 {}
class GFC213 extends GFC212 {
static void m(GFC211 x, GFC211 y) {System.out.print("GFC211,GFC211");}
static void m(GFC211 x, GFC212 y) {System.out.print("GFC211,GFC212");}
static void m(GFC212 x, GFC211 y) {System.out.print("GFC212,GFC211");}
static void m(GFC212 x, GFC212 y) {System.out.print("GFC212,GFC212");}
static void m(GFC211 x, GFC213 y) {System.out.print("GFC211,GFC213");}
public static void main(String[] args) {
GFC213 gfc213 = new GFC213(); m(gfc213, gfc213);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: GFC211,GFC211 |
| b. | Prints: GFC211,GFC212 |
| c. | Prints: GFC212,GFC211 |
| d. | Prints: GFC212,GFC212 |
| e. | Prints: GFC211,GFC213 |
| f. | Compile-time error |
| g. | Run-time error |
| h. | None of the above |
class GFC214 {
static void m1(boolean b1) {System.out.print("boolean ");}
static void m1(byte b1) {System.out.print("byte ");}
static void m1(short s1) {System.out.print("short ");}
static void m1(char c1) {System.out.print("char ");}
static void m1(int i1) {System.out.print("int ");}
public static void main(String[] args) {
byte b1; m1(b1 = 1); m1(b1); m1(b1 == 1);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: byte byte byte |
| b. | Prints: byte byte boolean |
| c. | Prints: int int int |
| d. | Compile-time error |
| e. | Run-time error |
| f. | None of the above |
class A {} class B extends A {}
class C extends B {
static void m(A x, A y) {System.out.print("AA");}
static void m(A x, B y) {System.out.print("AB");}
static void m(B x, A y) {System.out.print("BA");}
static void m(B x, B y) {System.out.print("BB");}
public static void main(String[] args) {
A a1; B b1; m(null,null); m(a1=null,b1=null); m(b1, a1);
}}
What is the result of attempting to compile and run the program?
| a. | Prints: BBABAB |
| b. | Prints: BBABBA |
| c. | Prints: BBBBAB |
| d. | Prints: BBBBBA |
| e. | Prints: BBBBBB |
| f. | Compile-time error |
| g. | Run-time error |
| h. | None of the above |
class A {} class B extends A {}
class C extends B {
static void m1(A x) {System.out.print("m1A");}
static void m2(B x) {System.out.print("m2B"); m1(x);}
static void m2(A x) {System.out.print("m2A"); m1(x);}
static void m3(C x) {System.out.print("m3C"); m2(x);}
static void m3(B x) {System.out.print("m3B"); m2(x);}
static void m3(A x) {System.out.print("m3A"); m2(x);}
public static void main(String[] args) {m3(new C());}
}
What is the result of attempting to compile and run the program?
| a. | Prints: m3Am2Am1A |
| b. | Prints: m3Bm2Bm1A |
| c. | Prints: m3Cm2Bm1A |
| d. | Prints: m3Cm2Am1A |
| e. | Compile-time error |
| f. | Run-time error |
| g. | None of the above |