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Java Standard Edition 5 Programmer Certified Professional Exam
Question No: 131 DRAG DROP – (Topic 2)
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Answer:
Question No: 132 – (Topic 2)
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Which code, inserted at line 14, will allow this class to correctly serialize and deserialize?
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this = s.defaultReadObject();
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y = s.readInt(); x = s.readInt();
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x = s.readInt(); y = s.readInt();
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s.defaultReadObject();
Answer: C
Question No: 133 – (Topic 2)
Given:
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public class Boxer1{
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Integer i;
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int x;
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public Boxer1(int y) {
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x = i y;
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System.out.println(x);
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7. }
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public static void main(String[] args) {
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new Boxer1(new Integer(4));
10. }
11. }
What is the result?
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A NumberFormatException occurs at runtime.
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An IllegalStateException occurs at runtime.
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Compilation fails because of an error in line 9.
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A NullPointerException occurs at runtime.
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Compilation fails because of an error in line 5.
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The value quot;4quot; is printed at the command line.
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Answer: D
Question No: 134 – (Topic 2)
Given the command line java Pass2 and:
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public class Pass2 {
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public void main(String [] args) {
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int x = 6;
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Pass2 p = new Pass2();
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p.doStuff(x);
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System.out.print(quot; main x = quot; x);
21. } 22.
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void doStuff(int x) {
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System.out.print(quot; doStuff x = quot; x );
25. }
26. }
What is the result?
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doStuff x = 6 main x = 6
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doStuff x = 6 main x = 7
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doStuff x = 7 main x = 7
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doStuff x = 7 main x = 6
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Compilation fails.
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An exception is thrown at runtime.
Answer: F
Question No: 135 – (Topic 2)
Given:
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static class A {
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void process() throws Exception { throw new Exception(); }
13. }
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static class B extends A {
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void process() { System.out.println(quot;Bquot;); }
16. }
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public static void main(String[] args) {
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new B().process();
19. }
What is the result?
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Compilation fails because of an error in line 15.
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Compilation fails because of an error in line 18.
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B
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The code runs with no output.
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Compilation fails because of an error in line 12.
Answer: C
Question No: 136 – (Topic 2)
Given:
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public class Threads5 {
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public static void main (String[] args) {
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new Thread(new Runnable() {
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public void run() {
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System.out.print(quot;barquot;); 6. }}).start();
7. }
8. }
What is the result?
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The code executes normally, but nothing prints.
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An exception is thrown at runtime.
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The code executes normally and prints quot;barquot;.
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Compilation fails.
Answer: C
Question No: 137 – (Topic 2)
Given:
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public class Drink implements Comparable {
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public String name;
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public int compareTo(Object o) {
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return 0; 5. }
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-
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6. }
and:
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Drink one = new Drink();
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Drink two = new Drink();
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one.name= quot;Coffeequot;;
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two.name= quot;Teaquot;;
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TreeSet set = new TreeSet();
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set.add(one);
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set.add(two);
A programmer iterates over the TreeSet and prints the name of each Drink object. What is the result?
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Coffee
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Coffee Tea
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Compilation fails.
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An exception is thrown at runtime.
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Tea
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The code runs with no output.
Answer: A
Question No: 138 DRAG DROP – (Topic 2)
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Answer:
Question No: 139 – (Topic 2)
Given:
10: public class Hello { 11: String title;
12: int value;
13: public Hello() { 14: title = quot; Worldquot;; 15: }
16: public Hello(int value) { 17: this.value = value;
18: title = quot;Helloquot;; 19: Hello();
20: }
21: }
and:
30: Hello c = new Hello(5); 31: System.out.println(c.title);
What is the result?
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An exception is thrown at runtime.
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Hello World 5
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The code runs with no output.
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Hello World
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Compilation fails.
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Hello
Answer: E
Question No: 140 DRAG DROP – (Topic 2)
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Answer:
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