Part A:

class Identifiers {

int i1; // 1

int _i2; // 2

int i_3; // 3

int #i4; // 4

int $i5; // 5

int %i6; // 6

int i$7; // 7

int 8i; // 8

}

Compile-time errors are generated at which lines? Choose 3.

a. 1

b. 2

c. 3

d. 4

e. 5

f. 6

g. 7

h. 8

Part B:

Entries are organized as key/value pairs.

Duplicate entries replace old entries.

Which interface of the java.util package offers the specified behavior?

a. List

b. Map

c. Set

d. None of the above

Part C:

1 import java.util.*;

2 class A {

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

4 Object a = new HashSet();

5 System.out.print((a instanceof Set)+",");

6 System.out.print(a instanceof SortedSet);

7 }

8 }

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

a. Prints: false,false

b. Prints: false,true

c. Prints: true,false

d. Prints: true,true

e. None of the above

Part D:

If you attempt to compile and execute the application listed below, will it ever print out the message In xxx?

1. class TestThread3 extends Thread {

2. public void run() {

3. System.out.println("Running");

4. System.out.println("Done");

5. }

6.

7. private void xxx() {

8. System.out.println("In xxx");

9. }

10.

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

12. TestThread3 ttt = new TestThread3();

13. ttt.xxx();

14. ttt.start(); 12. }

13. }

a. Yes

b. No

Part E:

What does the following code print out?

1. try {

2. int i = -5 % -3;

3. System.out.println("i = " + i);

4. }

5. catch (Exception e) {

6. System.out.println("TROUBLE");

7. }

a. i = 2

b. i = 3

c. i = -2

d. i = -3

e. TROUBLE