Free Oracle 1Z0-851 Exam Dumps Questions & Answers

Given a correctly compiled class whose source code is:
1.package com.sun.sjcp;
2.public class Commander {
3.public static void main(String[] args) {
4.// more code here
5.}
6.}
Assume that the class file is located in /foo/com/sun/sjcp/, the current directory is /foo/, and that the classpath contains "." (current directory). Which command line correctly runs Commander?

• A.  java -cp com/sun/sjcp Commander
• B.  java com/sun/sjcp/Commander
• C.  java -cp com.sun.sjcp Commander
• D.  java com.sun.sjcp.Commander
• E.  java Commander

Given:
11.public class Commander {
12.public static void main(String[] args) {
13.String myProp = /* insert code here */
14.System.out.println(myProp);
15.}
16.}
and the command line: java -Dprop.custom=gobstopper Commander Which two, placed on line 13, will produce the output gobstopper? (Choose two.)

• A.  System.getenv("prop.custom");
• B.  System.getProperty("prop.custom");
• C.  System.load("prop.custom");
• D.  System.getProperties().getProperty("prop.custom");
• E.  System.property("prop.custom");

Which two code fragments are most likely to cause a StackOverflowError? (Choose two.)

• A.  void counter(int i) { counter(++i); }
• B.  void doOne(int x) { doTwo(x); }
  void doTwo(int y) { doThree(y); }
  void doThree(int z) { doTwo(z); }
• C.  for(int x = 0; x < 1000000000; x++)
  doStuff(x);
• D.  int []x = {1,2,3,4,5};
  for(int y = 0; y < 6; y++)
  System.out.println(x[y]);
• E.  for(int y = 10; y < 10; y++)
  doStuff(y);
• F.  static int[] x = {7,6,5,4};
  static { x[1] = 8;
  x[4] = 3; }

Given:
11.public void genNumbers() {
12.ArrayList numbers = new ArrayList();
13.for (int i=0; i<10; i++) {
14.int value = i * ((int) Math.random());
15.Integer intObj = new Integer(value);
16.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?

• A.  Line 18
• B.  Line 16
• C.  Line 17
• D.  The object is NOT a candidate for garbage collection.
• E.  Line 19

Given:
11.String test = "Test A. Test B. Test C.";
12.// insert code here
13.String[] result = test.split(regex);
Which regular expression, inserted at line 12, correctly splits test into "Test A", "Test B", and "Test C"?

• A.  String regex = ".*";
• B.  String regex = "\\.\\s*";
• C.  String regex = "\\s";
• D.  String regex = " ";
• E.  String regex = "";
• F.  String regex = "\\w[ \.] +";