Chapter 6 Exceptions

Question 1

Which of the following statements are true? (Choose all that apply)

Accepted Answer

B. Runtime exceptions are the same thing as unchecked exceptions.

Answer

A. Runtime exceptions are the same thing as checked exceptions.

Answer

C. You can declare only checked exceptions.

Answer

D. You can declare only unchecked exceptions.

Answer

E. You can handle only Exception subclasses.

Question 2

Which of the following pairs fill in the blanks to make this code compile? (Choose all that
apply)
7: public void ohNo() _____ Exception {
8: _____________ Exception();
9: }

Accepted Answer

B. On line 7, fill in throws

Accepted Answer

D. On line 8, fill in throw new

Answer

A. On line 7, fill in throw

Answer

C. On line 8, fill in throw

Answer

E. On line 8, fill in throws

Answer

F. On line 8, fill in throws new

Question 3

When are you required to use a finally block in a regular try statement (not a try-withresources)?

Accepted Answer

C. When there are no catch blocks in a try statement.

Answer

A. Never.

Answer

B. When the program code doesn’t terminate on its own.

Answer

D. When there is exactly one catch block in a try statement.

Answer

E. When there are two or more catch blocks in a try statement.

Question 4

Which exception will the following throw?
Object obj = new Integer(3);
String str = (String) obj;
System.out.println(str);

Accepted Answer

B. ClassCastException

Answer

A. ArrayIndexOutOfBoundsException

Answer

C. IllegalArgumentException

Answer

D. NumberFormatException

Answer

E. None of the above.

Question 5

Which of the following exceptions are thrown by the JVM? (Choose all that apply)

Accepted Answer

A. ArrayIndexOutOfBoundsException

Accepted Answer

B. ExceptionInInitializerError

Accepted Answer

D. NullPointerException

Answer

C. java.io.IOException

Answer

E. NumberFormatException

Question 6

What will happen if you add the statement System.out.println(5 / 0); to a working
main() method?

Accepted Answer

C. It will run and throw an ArithmeticException.

Answer

A. It will not compile.

Answer

B. It will not run.

Answer

D. It will run and throw an IllegalArgumentException.

Answer

E. None of the above.

Question 7

What is printed besides the stack trace caused by the NullPointerException from line 16?
1: public class DoSomething {
2: public void go() {
3: System.out.print("A");
4: try {
5: stop();
6: } catch (ArithmeticException e) {
7: System.out.print("B");
8: } finally {
9: System.out.print("C");
10: }
11: System.out.print("D");
12: }
13: public void stop() {
14: System.out.print("E");
15: Object x = null;
16: x.toString();
17: System.out.print("F");
18: }
19: public static void main(String[] args) {
20: new DoSomething().go();
21: }
22: }

Accepted Answer

C. AEC

Answer

A. AE

Answer

B. AEBCD

Answer

D. AECD

Answer

E. No output appears other than the stack trace.

Question 8

What is the output of the following snippet, assuming a and b are both 0?
3: try {
4: return a / b;
5: } catch (RuntimeException e) {
6: return -1;
7: } catch (ArithmeticException e) {
8: return 0;
9: } finally {
10: System.out.print("done");
11: }

Accepted Answer

E. The code does not compile.

Answer

A. -1

Answer

B. 0

Answer

C. done-1

Answer

D. done0

Answer

F. An uncaught exception is thrown.

Question 9

What is the output of the following program?
1: public class Laptop {
2: public void start() {
3: try {
4: System.out.print("Starting up ");
5: throw new Exception();
6: } catch (Exception e) {
7: System.out.print("Problem ");
8: System.exit(0);
9: } finally {
10: System.out.print("Shutting down ");
11: }
12: }
13: public static void main(String[] args) {
14: new Laptop().start();
15: } }

Accepted Answer

B. Starting up Problem

Answer

A. Starting up

Answer

C. Starting up Problem Shutting down

Answer

D. Starting up Shutting down

Answer

E. The code does not compile.

Answer

F. An uncaught exception is thrown.

Question 10

What is the output of the following program?
1: public class Dog {
2: public String name;
3: public void parseName() {
4: System.out.print("1");
5: try {
6: System.out.print("2");
7: int x = Integer.parseInt(name);
8: System.out.print("3");
9: } catch (NumberFormatException e) {
10: System.out.print("4");
11: }
12: }
13: public static void main(String[] args) {
14: Dog leroy = new Dog();
15: leroy.name = "Leroy";
16: leroy.parseName();
17: System.out.print("5");
18: } }

Accepted Answer

E. 1245

Answer

A. 12

Answer

B. 1234

Answer

C. 1235

Answer

D. 124

Answer

F. The code does not compile.

Answer

G. An uncaught exception is thrown.

Question 11

What is the output of the following program?
1: public class Cat {
2: public String name;
3: public void parseName() {
4: System.out.print("1");
5: try {
6: System.out.print("2");
7: int x = Integer.parseInt(name);
8: System.out.print("3");
9: } catch (NullPointerException e) {
10: System.out.print("4");
11: }
12: System.out.print("5");
13: }
14: public static void main(String[] args) {
15: Cat leo = new Cat();
16: leo.name = "Leo";
17: leo.parseName();
18: System.out.print("6");
19: }
20: }

Accepted Answer

A. 12, followed by a stack trace for a NumberFormatException

Answer

B. 124, followed by a stack trace for a NumberFormatException

Answer

C. 12456

Answer

D. 12456

Answer

E. 1256, followed by a stack trace for a NumberFormatException

Answer

F. The code does not compile.

Answer

G. An uncaught exception is thrown.

Question 12

What is printed by the following? (Choose all that apply)
1: public class Mouse {
2: public String name;
3: public void run() {
4: System.out.print("1");
5: try {
6: System.out.print("2");
7: name.toString();
8: System.out.print("3");
9: } catch (NullPointerException e) {
10: System.out.print("4");
11: throw e;
12: }
13: System.out.print("5");
14: }
15: public static void main(String[] args) {
16: Mouse jerry = new Mouse();
17: jerry.run();
18: System.out.print("6");
19: } }

Accepted Answer

A. 1

Accepted Answer

B. 2

Accepted Answer

D. 4

Accepted Answer

G. The stack trace for a NullPointerException

Answer

C. 3

Answer

E. 5

Answer

F. 6

Question 13

Which of the following statements are true? (Choose all that apply)

Accepted Answer

A. You can declare a method with Exception as the return type.

Accepted Answer

B. You can declare any subclass of Error in the throws part of a method declaration.

Accepted Answer

C. You can declare any subclass of Exception in the throws part of a method declaration.

Accepted Answer

E. You can declare any subclass of RuntimeException in the throws part of a method declaration.

Answer

D. You can declare any subclass of Object in the throws part of a method declaration.

Question 14

Which of the following can be inserted on line 8 to make this code compile? (Choose all
that apply)
7: public void ohNo() throws IOException {
8: // INSERT CODE HERE
9: }

Accepted Answer

A. System.out.println("it's ok");

Accepted Answer

C. throw new IllegalArgumentException();

Accepted Answer

D. throw new java.io.IOException();

Accepted Answer

E. throw new RuntimeException();

Answer

B. throw new Exception();

Question 15

Which of the following are unchecked exceptions? (Choose all that apply)

Accepted Answer

A. ArrayIndexOutOfBoundsException

Accepted Answer

B. IllegalArgumentException

Accepted Answer

D. NumberFormatException

Accepted Answer

E. Any exception that extends RuntimeException

Answer

C. IOException

Answer

F. Any exception that extends Exception

Question 16

Which scenario is the best use of an exception?

Accepted Answer

B. An unexpected parameter is passed into a method.

Answer

A. An element is not found when searching a list.

Answer

C. The computer caught fire.

Answer

D. You want to loop through a list.

Answer

E. You don’t know how to code a method.

Question 17

Which of the following can be inserted into Lion to make this code compile? (Choose all
that apply)
class HasSoreThroatException extends Exception {}
class TiredException extends RuntimeException {}
interface Roar {
void roar() throws HasSoreThroatException;
}
class Lion implements Roar {// INSERT CODE HERE
}

Accepted Answer

A. public void roar(){}

Accepted Answer

C. public void roar() throws HasSoreThroatException{}

Accepted Answer

D. public void roar() throws IllegalArgumentException{}

Accepted Answer

E. public void roar() throws TiredException{}

Answer

B. public void roar() throws Exception{}

Question 18

Which of the following are true? (Choose all that apply)

Accepted Answer

A. Checked exceptions are allowed to be handled or declared.

Accepted Answer

B. Checked exceptions are required to be handled or declared.

Accepted Answer

C. Errors are allowed to be handled or declared.

Accepted Answer

E. Runtime exceptions are allowed to be handled or declared.

Answer

D. Errors are required to be handled or declared.

Answer

F. Runtime exceptions are required to be handled or declared.

Question 19

Which of the following can be inserted in the blank to make the code compile? (Choose all
that apply)
public static void main(String[] args) {
try {
System.out.println("work real hard");
} catch ( e) {
} catch (RuntimeException e) {
}
}

Accepted Answer

C. IllegalArgumentException

Accepted Answer

E. StackOverflowError

Answer

A. Exception

Answer

B. IOException

Answer

D. RuntimeException

Answer

F. None of the above.

Question 20

What does the output of the following contain? (Choose all that apply)
12: public static void main(String[] args) {
13: System.out.print("a");
14: try {
15: System.out.print("b");
16: throw new IllegalArgumentException();
17: } catch (IllegalArgumentException e) {
18: System.out.print("c");
19: throw new RuntimeException("1");
20: } catch (RuntimeException e) {
21: System.out.print("d");
22: throw new RuntimeException("2");
23: } finally {
24: System.out.print("e");
25: throw new RuntimeException("3");
26: }
27: }

Accepted Answer

A. abce

Accepted Answer

E. An exception with the message set to "3"

Answer

B. abde

Answer

C. An exception with the message set to "1"

Answer

D. An exception with the message set to "2"

Answer

F. Nothing; the code does not compile.

Chapter 6 Exceptions

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