Oracle 1Z0-501 시험 개요:

Oracle 1Z0-501 시험 요강 주제:

최신 Other Oracle Certification 1Z0-501 무료샘플문제

문제 #1
Given:
1 . public class SyncTest (
2 . private int x;
3 . private int y;
4 . private synchronized void setX (int i) (x=1;)
5 . private synchronized void setY (int i) (y=1;)
6 . public void setXY(int 1)(set X(i); setY(i);)
7 . public synchronized Boolean check() (return x !=y;)
8 . )
Under which conditions will check () return true when called from a different class?

A. Check() can return true when setXY is called by multiple threads.
B. Check() can only return true if SyncTest is changed to allow x and y to be set separately.
C. Check() can return true when multiple threads call setX and setY separately.
D. Check() can never return true.

문제 #2
Exhibit:
ClassOne.java
1. package com.abc.pkg1;
2. public class ClassOne {
3. private char var = 'a';
4. char getVar() {return var;}
5. } ClassTest.java
1 . package com.abc.pkg2;
2 . import com.abc.pkg1.ClassOne;
3 . public class ClassTest extends ClassOne {
4 . public static void main(String[]args){
5 .char a = new ClassOne().getVar();
6 .char b = new ClassTest().getVar();
7 .}
8 . }
What is the result?

A. Compilation will fail.
B. Compilation succeeds but an exception is thrown at line 6 in ClassTest.java.
C. Compilation succeeds but an exception is thrown at line 5 in ClassTest.java.
D. Compilation succeeds and no exceptions are thrown.

문제 #3
CORRECT TEXT
Exhibit:
1 . Public class test (
2 . Public static void stringReplace (String text)(
3 .Text = text.replace ('j' , 'i');
4 . )
5 .
6 . public static void bufferReplace (StringBuffer text)(
7 .text = text.append ("C")
8 . )
9 .
1 0. public static void main (String args[]} (
1 1.String textString = new String ("java");
1 2.StringBuffer text BufferString = new StringBuffer ("java");
1 3.
1 4.stringReplace (textString);
1 5.BufferReplace (textBuffer);
1 6.
1 7.System.out.printIn (textString + textBuffer);
1 8.}
1 9.)
What is the output?

문제 #4
Which statement is true for the class java.util.HashSet?

A. The elements in the collection are ordered.
B. The elements in the collection are guaranteed to be unique.
C. The collection is guaranteed to be immutable.
D. The elements in the collection are accessed using a unique key.
E. The elements in the collections are guaranteed to be synchronized.

문제 #5
Given:
1 . public class Test {
2 . public static void main (String[]args) {
3 . String foo = args[1];
4 . String bar = args[2];
5 . String baz = args[3];
6 . System.out.printIn("baz = " + baz);
7 .}
8 . }
And the output:
Baz = 2
Which command line invocation will produce the output?

A. Java Test 1 2 3 4
B. Java Test 4 2 4 2
C. Java Test 2222
D. Java Test 4 3 2 1

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