Oracle Java Standard Edition 5 Programmer Certified Professional - 1Z0-853 FREE EXAM DUMPS QUESTIONS & ANSWERS]

Question 1

Click the Exhibit button. Given:
34.
Test t = new Test();
35.
t.method(5);
What is the output from line 5 of the Test class?

A. 24 B. 10 C. 17 D. 5 E. 12

Discussion 0

Correct Answer: B Vote an answer

Question 2

Given:
34.
HashMap props = new HashMap();
35.
props.put("key45", "some value");
36.
props.put("key12", "some other value");
37.
props.put("key39", "yet another value");
38.
Set s = props.keySet();
39.
// insert code here
What, inserted at line 39, will sort the keys in the props HashMap?

A. s = new TreeSet(s); B. Collections.sort(s); C. s = new SortedSet(s); D. Arrays.sort(s);

Discussion 0

Correct Answer: A Vote an answer

Question 3

Given:
11.
public static Collection get() {
12.
Collection sorted = new LinkedList();
13.
sorted.add("B"); sorted.add("C"); sorted.add("A");
14.
return sorted;
15.
}
16.
public static void main(String[] args) {
17.
for (Object obj: get()) {
18.
System.out.print(obj + ", ");
19.
}
20.
}
What is the result?

A. Compilation fails. B. An exception is thrown at runtime. C. B, C, A, D. A, B, C, E. The code runs with no output.

Discussion 0

Correct Answer: C Vote an answer

Question 4

Which two statements are true about the hashCode method? (Choose two.)

A. The hashCode method for a given class can be used to test for object inequality, but NOT object equality, for that class. B. The only important characteristic of the values returned by a hashCode method is that the distribution of values must follow a Gaussian distribution. C. The hashCode method is used by the java.util.SortedSet collection class to order the elements within that set. D. The hashCode method for a given class can be used to test for object equality and object inequality for that class. E. The hashCode method is used by the java.util.HashSet collection class to group the elements within that set into hash buckets for swift retrieval.

Discussion 0

Correct Answer: A,E Vote an answer

Question 5

Given:
12.
NumberFormat nf = NumberFormat.getInstance();
13.
nf.setMaximumFractionDigits(4);
14.
nf.setMinimumFractionDigits(2);
15.
String a = nf.format(3.1415926);
16.
String b = nf.format(2);
Which two statements are true about the result if the default locale is Locale.US? (Choose two.)

A. The value of b is 2. B. The value of a is 3.1415. C. The value of a is 3.1416. D. The value of b is 2.00. E. The value of b is 2.0000. F. The value of a is 3.141. G. The value of a is 3.14.

Discussion 0

Correct Answer: C,D Vote an answer

Question 6

Click the Exhibit button.
Given:
ClassA a = new ClassA();
a.methodA();
What is the result?

A. Compilation fails. B. An exception is thrown at runtime. C. The code runs with no output. D. ClassC is displayed.

Discussion 0

Correct Answer: B Vote an answer

Question 7

Given:
11.
// insert code here
12.
private N min, max;
13.
public N getMin() { return min; }
14.
public N getMax() { return max; }
15.
public void add(N added) {
16.
if (min == null || added.doubleValue() < min.doubleValue()) 17. min = added;
18. if (max == null || added.doubleValue() > max.doubleValue()) 19. max = added;
20.
}
21.
}
Which two, inserted at line 11, will allow the code to compile? (Choose two.)

A. public class MinMax<N extends Object> { B. public class MinMax<? extends Object> { C. public class MinMax<? extends Number> { D. public class MinMax<N extends Number> { E. public class MinMax<N extends Integer> { F. public class MinMax<?> {

Discussion 0

Correct Answer: D,E Vote an answer

Question 8

Given:
1.public class Threads3 implements Runnable {
2.public void run() {
3.System.out.print("running");
4.}
5.public static void main(String[] args) {
6.Thread t = new Thread(new Threads3());
7.t.run();
8.t.run();
9.t.start();
10.
}
11.
}
What is the result?

A. The code executes and prints "runningrunningrunning". B. Compilation fails. C. The code executes and prints "running". D. An exception is thrown at runtime. E. The code executes and prints "runningrunning".

Discussion 0

Correct Answer: A Vote an answer

Question 9

Given:
1.public class Blip {
2.protected int blipvert(int x) { return 0; }
3.}
4.class Vert extends Blip {
5.// insert code here
6.}
Which five methods, inserted independently at line 5, will compile? (Choose five.)

A. protected long blipvert(int x) { return 0; } B. protected int blipvert(long x) { return 0; } C. protected long blipvert(int x, int y) { return 0; } D. public int blipvert(int x) { return 0; } E. private int blipvert(long x) { return 0; } F. private int blipvert(int x) { return 0; } G. protected long blipvert(long x) { return 0; }

Discussion 0

Correct Answer: B,C,D,E,G Vote an answer

Question 10

Given:
11.
class Converter {
12.
public static void main(String[] args) {
13.
Integer i = args[0];
14.
int j = 12;
15.
System.out.println("It is " + (j==i) + " that j==i.");
16.
}
17.
}
What is the result when the programmer attempts to compile the code and run it with the command java Converter 12?

A. Compilation fails because of an error in line 13. B. It is false that j==i. C. An exception is thrown at runtime. D. It is true that j==i.

Discussion 0

Correct Answer: A Vote an answer

Question 11

Given:
11.
public static void append(List list) { list.add("0042"); }
12.
public static void main(String[] args) {
13.
List<Integer> intList = new ArrayList<Integer>();
14.
append(intList);
15.
System.out.println(intList.get(0));
16.
}
What is the result?

A. Compilation fails because of an error in line 14. B. Compilation fails because of an error in line 13. C. An exception is thrown at runtime. D. 42 E. 0042

Discussion 0

Correct Answer: E Vote an answer

Question 12

A programmer must create a generic class MinMax and the type parameter of MinMax must implement Comparable. Which implementation of MinMax will compile?

A. class MinMax<E implements Comparable<E>> {
E min = null;
E max = null;
public MinMax() {}
public void put(E value) { /* store min or max */ } B. class MinMax<E extends Comparable<E>> {
<E>
E min = null;
<E>
E max = null;
public MinMax() {}
public <E> void put(E value) { /* store min or max */ } C. class MinMax<E extends Comparable<E>> {
E min = null;
E max = null;
public MinMax() {}
public void put(E value) { /* store min or max */ } D. class MinMax<E implements Comparable<E>> {
<E>
E min = null;
<E>
E max = null;
public MinMax() {}
public <E> void put(E value) { /* store min or max */ }

Discussion 0

Correct Answer: C Vote an answer

Question 13

Given classes defined in two different files:
1.package util;
2.public class BitUtils {
3.public static void process(byte[]) { /* more code here */ }
4.}
1.package app;
2.public class SomeApp {
3.public static void main(String[] args) {
4.byte[] bytes = new byte[256];
5.// insert code here
6.}
7.}
What is required at line 5 in class SomeApp to use the process method of BitUtils?

A. BitUtils.process(bytes); B. SomeApp cannot use methods in BitUtils. C. import util.BitUtils.*; process(bytes); D. util.BitUtils.process(bytes); E. process(bytes);

Discussion 0

Correct Answer: D Vote an answer