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Java Standard Edition 5 Programmer Certified Professional Exam
Question No: 11 – (Topic 1)
Click the Exhibit button.
What is the result?
-
The code will deadlock.
-
The code may run with output quot;2 0 6 4quot;.
-
The code may run with no output.
-
The code may run with output quot;0 6quot;.
-
An exception is thrown at runtime.
-
The code may run with output quot;0 2 4 6quot;.
Answer: F
Question No: 12 – (Topic 1)
Given:
-
public class Blip {
-
protected int blipvert(int x) { return 0; } 3. }
-
-
class Vert extends Blip {
-
// insert code here 6. }
Which five methods, inserted independently at line 5, will compile? (Choose five.)
-
protected int blipvert(long x) { return 0; }
-
protected long blipvert(int x) { return 0; }
-
private int blipvert(long x) { return 0; }
-
private int blipvert(int x) { return 0; }
-
public int blipvert(int x) { return 0; }
-
protected long blipvert(long x) { return 0; }
-
protected long blipvert(int x, int y) { return 0; }
-
Answer: A,C,E,F,G
Question No: 13 DRAG DROP – (Topic 1)
Click the Task button.
Answer:
Question No: 14 – (Topic 1)
Given:
12. System.out.format(quot;Pi is approximately %d.quot;, Math.PI); What is the result?
-
An exception is thrown at runtime.
-
Compilation fails.
-
Pi is approximately 3.
-
Pi is approximately 3.141593.
Answer: A
Question No: 15 – (Topic 1)
Given the command line java Pass2 and:
-
public class Pass2 {
-
public void main(String [] args) {
-
int x = 6;
-
Pass2 p = new Pass2();
-
p.doStuff(x);
-
System.out.print(quot; main x = quot; x);
21. } 22.
-
void doStuff(int x) {
-
System.out.print(quot; doStuff x = quot; x );
25. }
26. }
What is the result?
-
doStuff x = 6 main x = 6
-
Compilation fails.
-
doStuff x = 6 main x = 7
-
An exception is thrown at runtime.
-
doStuff x = 7 main x = 6
-
doStuff x = 7 main x = 7
Answer: D
Question No: 16 – (Topic 1)
Given:
-
public static void search(Listlt;Stringgt; list) {
-
list.clear();
-
list.add(quot;bquot;);
-
list.add(quot;aquot;);
-
list.add(quot;cquot;);
-
System.out.println(Collections.binarySearch(list, quot;aquot;));
19. }
What is the result of calling search with a valid List implementation?
-
0
-
The result is undefined.
-
a
-
2
-
1
-
c
-
b
Answer: B
Question No: 17 – (Topic 1)
Click the Exhibit button.
Given: ClassA a = new ClassA(); a.methodA();
What is the result?
-
The code runs with no output.
-
Compilation fails.
-
An exception is thrown at runtime.
-
ClassC is displayed.
Answer: C
Question No: 18 – (Topic 1)
Given:
-
public static void test(String str) {
-
int check = 4;
-
if (check = str.length()) {
-
System.out.print(str.charAt(check -= 1) quot;, quot;);
-
} else {
-
System.out.print(str.charAt(0) quot;, quot;);
17. }
18. }
and the invocation:
-
test(quot;fourquot;);
-
test(quot;teequot;);
-
test(quot;toquot;); What is the result?
-
An exception is thrown at runtime.
-
r, e, o,
-
Compilation fails.
-
r, t, t,
Answer: C
Question No: 19 – (Topic 1)
A JavaBeans component has the following field:
11. private boolean enabled;
Which two pairs of method declarations follow the JavaBeans standard for accessing this
field? (Choose two.)
-
public boolean setEnabled( boolean enabled ) public boolean getEnabled()
-
public void setEnabled( boolean enabled ) public void isEnabled()
-
public void setEnabled( boolean enabled ) public boolean getEnabled()
-
public void setEnabled( boolean enabled ) public boolean isEnabled()
Answer: C,D
Question No: 20 – (Topic 1)
Given:
-
public void genNumbers() {
-
ArrayList numbers = new ArrayList(); 13. for (int i=0; ilt;10; i ) {
-
int value = i * ((int) Math.random());
-
Integer intObj = new Integer(value);
-
numbers.add(intObj);
17. }
18. System.out.println(numbers);
19. }
Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbage collection?
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Line 19
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The object is NOT a candidate for garbage collection.
-
Line 17
-
Line 16
-
Line 18
Answer: A
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