Unlike other question banks that are available on the market, our 1Z0-804 Latest Dumps Questions guide dumps specially proposed different versions to allow you to learn not only on paper, but also to use mobile phones to learn. This greatly improves the students' availability of fragmented time. You can choose the version of 1Z0-804 Latest Dumps Questions learning materials according to your interests and habits. Taking this into consideration, we have tried to improve the quality of our 1Z0-804 Latest Dumps Questions training materials for all our worth. Now, I am proud to tell you that our 1Z0-804 Latest Dumps Questions study dumps are definitely the best choice for those who have been yearning for success but without enough time to put into it. If you still fail to pass the exam, you can take back your money in full without any deduction.
Java and Middleware 1Z0-804 Your life will be even more exciting.
With all the questons and answers of our 1Z0-804 - Java SE 7 Programmer II Exam Latest Dumps Questions study materials, your success is 100% guaranteed. Though the content of these three versions is the same, the displays have their different advantages. With our 1Z0-804 Pass Guaranteed study materials, you can have different and pleasure study experience as well as pass 1Z0-804 Pass Guaranteed exam easily.
We believe that you will like our products. According to the different demands from customers, the experts and professors designed three different versions for all customers. According to your need, you can choose the most suitable version of our Java SE 7 Programmer II Exam guide torrent for yourself.
Oracle 1Z0-804 Latest Dumps Questions - So you will have a positive outlook on life.
As we enter into such a competitive world, the hardest part of standing out from the crowd is that your skills are recognized then you will fit into the large and diverse workforce. The 1Z0-804 Latest Dumps Questions certification is the best proof of your ability. However, it’s not easy for those work officers who has less free time to prepare such an 1Z0-804 Latest Dumps Questions exam. Here comes 1Z0-804 Latest Dumps Questions exam materials which contain all of the valid 1Z0-804 Latest Dumps Questions study questions. You will never worry about the 1Z0-804 Latest Dumps Questions exam.
In the meantime, all your legal rights will be guaranteed after buying our 1Z0-804 Latest Dumps Questions study materials. For many years, we have always put our customers in top priority.
1Z0-804 PDF DEMO:
QUESTION NO: 1
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: 2
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: 3
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: 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 fragment: If thread a and thread b are running, but not completing, which two could be occurring?
A.livelock
B.deadlock
C.starvation
D.loose coupling
E.cohesion
Answer: A,B
Explanation:
A: A thread often acts in response to the action of another thread. If the other thread's action is also a response to the action of another thread, then livelock may result. A thread often acts in response to the action of another thread. If the other thread's action is also a response to the action of another thread, then livelock may result.
B: Deadlock describes a situation where two or more threads are blocked forever, waiting for each other.
So we never stop the pace of offering the best services and Fortinet NSE7_OTS-7.2 practice materials for you. Even the HP HPE2-T37 test syllabus is changing every year; our experts still have the ability to master the tendency of the important knowledge as they have been doing research in this career for years. Our SAP P_BTPA_2408 study materials provide a promising help for your SAP P_BTPA_2408 exam preparation whether newbie or experienced exam candidates are eager to have them. If you are preparing for the exam by the guidance of the CompTIA CS0-003 study practice question from our company and take it into consideration seriously, you will absolutely pass the exam and get the related certification. With our SAP C-ARSUM-2404 study guide, not only that you can pass you exam easily and smoothly, but also you can have a wonderful study experience based on the diversed versions of our SAP C-ARSUM-2404 training prep.
Updated: May 28, 2022