Java Programming Language Practice Quiz Questions

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Questions: 25 | Attempts: 499 | Updated: Mar 22, 2023

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Mar 22, 2023

Quiz Edited by
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Oct 29, 2011

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Java Programming Language Practice Quiz Questions

Given:

11. public interface Status {

12. /* insert code here */ int MY_VALUE = 10;

13. }

Which three are valid on line 12? (Choose three.)

Given:

10. public class Bar {

11.static void foo(int...x) {

12. // insert code here

13. }

14. }

Which two code fragments, inserted independently at line 12, will allow

the class to compile? (Choose two.)

4. Given:

31. // some code here

32. try {

33. // some code here

34. } catch (SomeException se) {

35. // some code here

36. } finally {

37. // some code here

38. }

Under which three circumstances will the code on line 37 be executed?

(Choose three.)

Given:

• d is a valid, non-null Date object

• df is a valid, non-null DateFormat object set to the

current locale

What outputs the current locales country name and the appropriate

version of d’s date?

Which Man class properly represents the relationship “Man has a best friend who is a Dog”?

Given:

11. public class Person {

12. private name;

13. public Person(String name) {

14. this.name = name;

15. }

16. public int hashCode() {

17. return 420;

18. }

19. }

Which is true?

Given:

23. Object [] myObjects = {

24. new integer(12),

25. new String(”foo”),

26. new integer(5),

27. new Boolean(true)

28. };

29. Arrays.sort(myObjects);

30. for( int i=0; i

31. System.out.print(myObjects[i].toString());

32. System.out.print(” “);

33. }

What is the result?

Given:

10. package com.sun.scjp;

11. public class Geodetics {

12. public static final double DIAMETER = 12756.32; // kilometers

13. }

Which two correctly access the DIAMETER member of the Geodetics

class? (Choose two.)

Given:

10. class Nav{

11. public enum Direction { NORTH, SOUTH, EAST, WEST }

12. }

13. public class Sprite{

14. // insert code here

15. }

Which code, inserted at line 14, allows the Sprite class to compile?

Given:

10. interface Foo { int bar(); }

11. public class Sprite {

12. public int fubar( Foo foo) { return foo.bar(); }

13. public void testFoo() {

14. fubar(

15. // insert code here

16.);

17. }

18. }

Which code, inserted at line 15, allows the class Sprite to compile?

Given:

1. public interface A {

2. String DEFAULT_GREETING = “Hello World”;

3. public void method1();

4. }

A programmer wants to create an interface called B that has A as its

parent. Which interface declaration is correct?

Given:

1. interface TestA { String toString(); }

2. public class Test {

3. public static void main(String[] args) {

4. System.out.println(new TestA() {

5. public String toString() { return “test”; }

6. });

7. }

8. }

What is the result?

Question 21

Given:

11. public abstract class Shape {

12. int x;

13. int y;

14. public abstract void draw();

15. public void setAnchor(int x, int y) {

16. this.x = x;

17. this.y = y;

18. }

19. }

and a class Circle that extends and fully implements the Shape class.

Which is correct?

Given:

10. interface Data { public void load(); }

11. abstract class Info { public abstract void load(); }

Which class correctly uses the Data interface and Info class?

A

Given:

11. public abstract class Shape {

12. private int x;

13. private int y;

14. public abstract void draw();

15. public void setAnchor(int x, int y) {

16. this.x = x;

17. this.y = y;

18. }

19. }

Which two classes use the Shape class correctly? (Choose two.)

Which two classes correctly implement both the java.lang.Runnable and the java.lang.Clonable interfaces? (Choose two.)

Java Programming Language Practice Quiz Questions

Given: 11. public interface Status { 12. /* insert code here */ int MY_VALUE = 10; 13. } Which three are valid on line 12? (Choose three.)

Given: 10. public class Bar { 11.static void foo(int...x) { 12. // insert code here 13. } 14. } Which two code fragments, inserted independently at line 12, will allow the class to compile? (Choose two.)

4. Given: 31. // some code here 32. try { 33. // some code here 34. } catch (SomeException se) { 35. // some code here 36. } finally { 37. // some code here 38. } Under which three circumstances will the code on line 37 be executed? (Choose three.)

Given: • d is a valid, non-null Date object • df is a valid, non-null DateFormat object set to the current locale What outputs the current locales country name and the appropriate version of d’s date?

Which Man class properly represents the relationship “Man has a best friend who is a Dog”?

Given: 11. public class Person { 12. private name; 13. public Person(String name) { 14. this.name = name; 15. } 16. public int hashCode() { 17. return 420; 18. } 19. } Which is true?

Given: 23. Object [] myObjects = { 24. new integer(12), 25. new String(”foo”), 26. new integer(5), 27. new Boolean(true) 28. }; 29. Arrays.sort(myObjects); 30. for( int i=0; i 31. System.out.print(myObjects[i].toString()); 32. System.out.print(” “); 33. } What is the result?

12. Given: 13. public class Pass { 14. public static void main(String [1 args) { 15. int x 5; 16. Pass p = new Pass(); 17. p.doStuff(x); 18. System.out.print(” main x = “+ x); 19. } 20. 21. void doStuff(int x) { 22. System.out.print(” doStuff x = “+ x++); 23. } 24. } What is the result?

Given: 10. package com.sun.scjp; 11. public class Geodetics { 12. public static final double DIAMETER = 12756.32; // kilometers 13. } Which two correctly access the DIAMETER member of the Geodetics class? (Choose two.)

Given: 10. class Nav{ 11. public enum Direction { NORTH, SOUTH, EAST, WEST } 12. } 13. public class Sprite{ 14. // insert code here 15. } Which code, inserted at line 14, allows the Sprite class to compile?

Given: 10. interface Foo { int bar(); } 11. public class Sprite { 12. public int fubar( Foo foo) { return foo.bar(); } 13. public void testFoo() { 14. fubar( 15. // insert code here 16.); 17. } 18. } Which code, inserted at line 15, allows the class Sprite to compile?

Given: 1. public interface A { 2. String DEFAULT_GREETING = “Hello World”; 3. public void method1(); 4. } A programmer wants to create an interface called B that has A as its parent. Which interface declaration is correct?

Given: 1. class TestA { 2. public void start() { System.out.println(”TestA”); } 3. } 4. public class TestB extends TestA { 5. public void start() { System.out.println(”TestB”); } 6. public static void main(String[] args) { 7. ((TestA)new TestB()).start(); 8. } 9. } What is the result?

Given: 1. interface TestA { String toString(); } 2. public class Test { 3. public static void main(String[] args) { 4. System.out.println(new TestA() { 5. public String toString() { return “test”; } 6. }); 7. } 8. } What is the result?

Question 21 Given: 11. public abstract class Shape { 12. int x; 13. int y; 14. public abstract void draw(); 15. public void setAnchor(int x, int y) { 16. this.x = x; 17. this.y = y; 18. } 19. } and a class Circle that extends and fully implements the Shape class. Which is correct?

Given: 10. interface Data { public void load(); } 11. abstract class Info { public abstract void load(); } Which class correctly uses the Data interface and Info class? A

Given: 11. public abstract class Shape { 12. private int x; 13. private int y; 14. public abstract void draw(); 15. public void setAnchor(int x, int y) { 16. this.x = x; 17. this.y = y; 18. } 19. } Which two classes use the Shape class correctly? (Choose two.)

Which two classes correctly implement both the java.lang.Runnable and the java.lang.Clonable interfaces? (Choose two.)

Given:

11. public interface Status {

12. /* insert code here */ int MY_VALUE = 10;

13. }

Which three are valid on line 12? (Choose three.)

Given:

10. public class Bar {

11.static void foo(int...x) {

12. // insert code here

13. }

14. }

Which two code fragments, inserted independently at line 12, will allow

the class to compile? (Choose two.)

4. Given:

31. // some code here

32. try {

33. // some code here

34. } catch (SomeException se) {

35. // some code here

36. } finally {

37. // some code here

38. }

Under which three circumstances will the code on line 37 be executed?

(Choose three.)

Given:

• d is a valid, non-null Date object

• df is a valid, non-null DateFormat object set to the

current locale

What outputs the current locales country name and the appropriate

version of d’s date?

Given:

11. public class Person {

12. private name;

13. public Person(String name) {

14. this.name = name;

15. }

16. public int hashCode() {

17. return 420;

18. }

19. }

Which is true?

Given:

23. Object [] myObjects = {

24. new integer(12),

25. new String(”foo”),

26. new integer(5),

27. new Boolean(true)

28. };

29. Arrays.sort(myObjects);

30. for( int i=0; i

31. System.out.print(myObjects[i].toString());

32. System.out.print(” “);

33. }

What is the result?

Given:

10. package com.sun.scjp;

11. public class Geodetics {

12. public static final double DIAMETER = 12756.32; // kilometers

13. }

Which two correctly access the DIAMETER member of the Geodetics

class? (Choose two.)

Given:

10. class Nav{

11. public enum Direction { NORTH, SOUTH, EAST, WEST }

12. }

13. public class Sprite{

14. // insert code here

15. }

Which code, inserted at line 14, allows the Sprite class to compile?

Given:

10. interface Foo { int bar(); }

11. public class Sprite {

12. public int fubar( Foo foo) { return foo.bar(); }

13. public void testFoo() {

14. fubar(

15. // insert code here

16.);

17. }

18. }

Which code, inserted at line 15, allows the class Sprite to compile?

Given:

1. public interface A {

2. String DEFAULT_GREETING = “Hello World”;

3. public void method1();

4. }

A programmer wants to create an interface called B that has A as its

parent. Which interface declaration is correct?

Given:

1. interface TestA { String toString(); }

2. public class Test {

3. public static void main(String[] args) {

4. System.out.println(new TestA() {

5. public String toString() { return “test”; }

6. });

7. }

8. }

What is the result?

Question 21

Given:

11. public abstract class Shape {

12. int x;

13. int y;

14. public abstract void draw();

15. public void setAnchor(int x, int y) {

16. this.x = x;

17. this.y = y;

18. }

19. }

and a class Circle that extends and fully implements the Shape class.

Which is correct?

Given:

10. interface Data { public void load(); }

11. abstract class Info { public abstract void load(); }

Which class correctly uses the Data interface and Info class?

A

Given:

11. public abstract class Shape {

12. private int x;

13. private int y;

14. public abstract void draw();

15. public void setAnchor(int x, int y) {

16. this.x = x;

17. this.y = y;

18. }

19. }

Which two classes use the Shape class correctly? (Choose two.)