Every page and every points of knowledge have been written from professional experts who are proficient in this line and are being accounting for this line over ten years. And they know every detail about our 1Z0-804 Test learning prep and can help you pass the exam for sure. Our 1Z0-804 Test guide materials are high quality and high accuracy rate products. More importantly, our good 1Z0-804 Test guide quiz and perfect after sale service are approbated by our local and international customers. If you are worry about the coming 1Z0-804 Test exam, our 1Z0-804 Test study materials will help you solve your problem. Our website is considered to be the most professional platform offering 1Z0-804 Test practice guide, and gives you the best knowledge of the 1Z0-804 Test study materials.
Java and Middleware 1Z0-804 No company in the field can surpass us.
With high-quality 1Z0-804 - Java SE 7 Programmer II Exam Test guide materials and flexible choices of learning mode, they would bring about the convenience and easiness for you. Because, after all, 1Z0-804 Latest Study Questions Sheet is a very important certified exam of Oracle. But 1Z0-804 Latest Study Questions Sheet exam is not so simple.
Our 1Z0-804 Test learning materials are just staring points for exam candidates, and you may meet several challenging tasks or exams in the future about computer knowledge, we can still offer help. Need any help, please contact with us again! All time and energy you devoted to the 1Z0-804 Test preparation quiz is worthwhile.
Oracle 1Z0-804 Test - It can help a lot of people achieve their dream.
In this social-cultural environment, the 1Z0-804 Test certificates mean a lot especially for exam candidates like you. To some extent, these 1Z0-804 Test certificates may determine your future. With respect to your worries about the practice exam, we recommend our 1Z0-804 Test preparation materials which have a strong bearing on the outcomes dramatically. For a better understanding of their features, please follow our website and try on them.
There a galaxy of talents in the 21st century, but professional IT talents not so many. Society need a large number of professional IT talents.
1Z0-804 PDF DEMO:
QUESTION NO: 1
Given the code fragment:
What is the result?
A.Null B D
B.Null B null D
C.B D
D.D
E.An exception is thrown at runtime
Answer: C
QUESTION NO: 2
Given:
Which two are true?
A.A runtime exception is thrown on line 9.
B.No output is produced.
C.Greeting is printed once.
D.Greeting is printed twice.
E.No new threads of execution are started within the main method.
F.One new thread of execution is started within the main method.
G.Two new threads of execution are started within the main method.
Answer: C,E
Explanation:
Thread t2 is executed. Execution of T2 starts executionen of t1. Greeting is printed during the execution of t1.
QUESTION NO: 3
Which two properly implement a Singleton pattern?
A.class Singleton {
private static Singleton instance;
private Singleton () {}
public static synchronized Singleton getInstance() {
if (instance == null) {
instance = new Singleton ();
}
return instance;
}
}
B.class Singleton {
private static Singleton instance = new Singleton();
protected Singleton () {}
public static Singleton getInstance () {
return instance;
}
}
C.class Singleton {
Singleton () {}
private static class SingletonHolder {
private static final Singleton INSTANCE = new Singleton ();
}
public static Singleton getInstance () {
return SingletonHolder.INSTANCE; } }
D.enum Singleton {
INSTANCE;
}
Answer: A,D
Explanation:
A: Here the method for getting the reference to the SingleTon object is correct.
B: The constructor should be private
C: The constructor should be private
Note: Java has several design patterns Singleton Pattern being the most commonly used. Java
Singleton pattern belongs to the family of design patterns, that govern the instantiation process. This design pattern proposes that at any time there can only be one instance of a singleton (object) created by the JVM.
The class's default constructor is made private, which prevents the direct instantiation of the object by others (Other Classes). A static modifier is applied to the instance method that returns the object as it then makes this method a class level method that can be accessed without creating an object.
OPTION A == SHOW THE LAZY initialization WITHOUT DOUBLE CHECKED LOCKING TECHNIQUE ,BUT
ITS CORRECT OPTION D == Serialzation and thraead-safety guaranteed and with couple of line of code enum Singleton pattern is best way to create Singleton in Java 5 world.
AND THERE ARE 5 WAY TO CREATE SINGLETON CLASS IN JAVA 1>>LAZY LOADING (initialization)
USING SYCHRONIZATION 2>>CLASS LOADING (initialization) USING private static final Singleton instance = new
Singleton(); 3>>USING ENUM 4>>USING STATIC NESTED CLASS
5>>USING STATIC BLOCK
AND MAKE CONSTRUCTOR PRIVATE IN ALL 5 WAY.
QUESTION NO: 4
Given the code fragment:
What is the result?
A.getName (0): C:\
subpath (0, 2): C:\education\report.txt
B.getName(0): C:\ subpth(0, 2): C:\education
C.getName(0): education subpath (0, 2): education\institute
D.getName(0): education subpath(0, 2): education\institute\student
E.getName(0): report.txt subpath(0, 2): insritute\student
Answer: C
Explanation:
Example:
Path path = Paths.get("C:\\home\\joe\\foo");
getName(0)
-> home
subpath(0,2)
Reference: The Java Tutorial, Path Operations
QUESTION NO: 5
Given the code fragment:
What is the result?
A.Java 7
B.Java 6
C.Java 7, Java 6
D.Java 7 java 6
E.Java
Answer: C
Explanation:
regex: Java / one or more anything !!! / ends with a digit so it is the source string
Besides, we are punctually meeting commitments to offer help on SAP C_ARSUM_2404 study materials. More and more people choose Oracle EMC D-PDC-DY-23 exam. If you require any further information about either our SASInstitute A00-282 preparation exam or our corporation, please do not hesitate to let us know. Our Oracle EMC D-PM-IN-23 exam training materials contains questions and answers. We assume all the responsibilities our SAP C-THR82-2405 simulating practice may bring you foreseeable outcomes and you will not regret for believing in us assuredly.
Updated: May 28, 2022