Please make a decision quickly. We are waiting for you to purchase our 1Z0-804 Valid Braindumps Book exam questions. In order to survive in the society and realize our own values, learning our 1Z0-804 Valid Braindumps Book practice engine is the best way. And here, fortunately, you have found the 1Z0-804 Valid Braindumps Book exam braindumps, a learning platform that can bring you unexpected experiences. Today, in an era of fierce competition, how can we occupy a place in a market where talent is saturated? The answer is a certificate. If you choose Omgzlook, success is not far away for you.
Java and Middleware 1Z0-804 But this is still not enough.
Java and Middleware 1Z0-804 Valid Braindumps Book - Java SE 7 Programmer II Exam The last but not least we have professional groups providing guidance in terms of download and installment remotely. But it does not matter, because I chose Omgzlook's Oracle Reliable Test 1Z0-804 Study Guide exam training materials. It can help me realize my dream.
Most of the experts have been studying in the professional field for many years and have accumulated much experience in our 1Z0-804 Valid Braindumps Book practice questions. The high-quality of our 1Z0-804 Valid Braindumps Book exam questions are praised by tens of thousands of our customers. You may try it!
Oracle 1Z0-804 Valid Braindumps Book - If you fail, don't forget to learn your lesson.
All exam materials in 1Z0-804 Valid Braindumps Book learning materials contain PDF, APP, and PC formats. They have the same questions and answers but with different using methods. If you like to take notes randomly according to your own habits while studying, we recommend that you use the PDF format of our 1Z0-804 Valid Braindumps Book study guide. And besides, you can take it with you wherever you go for it is portable and takes no place. So the PDF version of our 1Z0-804 Valid Braindumps Book exam questions is convenient.
Downloading the 1Z0-804 Valid Braindumps Book free demo doesn't cost you anything and you will learn about the pattern of our practice exam and the accuracy of our 1Z0-804 Valid Braindumps Book test answers. We constantly check the updating of 1Z0-804 Valid Braindumps Book vce pdf to follow the current exam requirement and you will be allowed to free update your pdf files one-year.
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 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: 3
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: 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
We often ask, what is the purpose of learning? Why should we study? Why did you study for PECB ISO-IEC-27001-Lead-Implementerexam so long? As many people think that, even if one day we forget the formula for the area of a triangle, we can still live very well, but if it were not for the knowledge of learning PECB ISO-IEC-27001-Lead-Implementer exam and try to obtain certification, how can we have the opportunity to good to future life? So, the examination is necessary, only to get the test PECB ISO-IEC-27001-Lead-Implementer certification, get a certificate, to prove better us, to pave the way for our future life. Our EMC D-PSC-DS-23 practice exam available in three modes, pdf files, and PC test engine and online test engine, which apply to any level of candidates. Improving your efficiency and saving your time has always been the goal of our EMC D-PDC-DY-23 preparation exam. You can use the Cisco 300-635 online test off-line, while you should run it in the network environment. Pegasystems PEGAPCDC87V1 - The clients can choose the version which supports their equipment on their hands to learn.
Updated: May 28, 2022