In our software version of the 1Z0-804 Popular Exams exam dumps, the unique point is that you can take part in the practice test before the real 1Z0-804 Popular Exams exam. You never know what you can get till you try. It is universally acknowledged that mock examination is of great significance for those who are preparing for the exam since candidates can find deficiencies of their knowledge as well as their shortcomings in the practice test, so that they can enrich their knowledge before the real 1Z0-804 Popular Exams exam. But it does not matter, because I purchased Omgzlook's Oracle 1Z0-804 Popular Exams exam training materials. With it, I can pass the Oracle 1Z0-804 Popular Exams exam easily. Are you still worried about the exam? Don’t worry!
Java and Middleware 1Z0-804 Many customers may be doubtful about our price.
Even if you have a week foundation, I believe that you will get the certification by using our 1Z0-804 - Java SE 7 Programmer II Exam Popular Exams study materials. Our exam questions just need students to spend 20 to 30 hours practicing on the platform which provides simulation problems, can let them have the confidence to pass the 1Z0-804 Latest Exam Collection Sheet exam, so little time great convenience for some workers. It must be your best tool to pass your exam and achieve your target.
Our 1Z0-804 Popular Exams practice exam will be your best assistant to get the 1Z0-804 Popular Exams certification. And our 1Z0-804 Popular Exams study materials are always considered the guarantee to pass the exam. You are the best and unique in the world.
You will never worry about the Oracle 1Z0-804 Popular Exams exam.
To cope with the fast growing market, we will always keep advancing and offer our clients the most refined technical expertise and excellent services about our 1Z0-804 Popular Exams exam questions. In the meantime, all your legal rights will be guaranteed after buying our 1Z0-804 Popular Exams study materials. For many years, we have always put our customers in top priority. Not only we offer the best 1Z0-804 Popular Exams training prep, but also our sincere and considerate attitude is praised by numerous of our customers.
So we never stop the pace of offering the best services and 1Z0-804 Popular Exams practice materials for you. Tens of thousands of candidates have fostered learning abilities by using our 1Z0-804 Popular Exams Learning materials you can be one of them definitely.
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 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.
QUESTION NO: 4
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: 5
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
Even the CheckPoint 156-590 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 Google Professional-Data-Engineer study materials provide a promising help for your Google Professional-Data-Engineer exam preparation whether newbie or experienced exam candidates are eager to have them. As is known to us, our company has promised that the EMC D-XTR-MN-A-24 exam braindumps from our company will provide more than 99% pass guarantee for all people who try their best to prepare for the exam. So grapple with this chance, our EMC D-PDD-OE-23 learning materials will not let you down. SAP C-THR86-2405 - Do not worry.
Updated: May 28, 2022