Expert team not only provides the high quality for the 1Z0-804 Book quiz guide consulting, also help users solve problems at the same time, leak fill a vacancy, and finally to deepen the user's impression, to solve the problem of {ExamCde} test material and no longer make the same mistake. There is a succession of anecdotes, and there are specialized courses. Experts call them experts, and they must have their advantages. Under the situation of intensifying competition in all walks of life, will you choose to remain the same and never change or choose to obtain a 1Z0-804 Book certification which can increase your competitiveness? I think most of people will choose the latter, because most of the time certificate is a kind of threshold, with 1Z0-804 Book certification, you may have the opportunity to enter the door of an industry. And our 1Z0-804 Book exam questions will be your best choice to gain the certification. Unlike other 1Z0-804 Book study materials, there is only one version and it is not easy to carry.
Our 1Z0-804 Book exam questions are often in short supply.
Java and Middleware 1Z0-804 Book - Java SE 7 Programmer II Exam Action always speaks louder than words. If you are satisfied with our Latest Study 1Z0-804 Questions Free training guide, come to choose and purchase. If you buy the Software or the APP online version of our Latest Study 1Z0-804 Questions Free study materials, you will find that the timer can aid you control the time.
Now, you are fortunate enough to come across our 1Z0-804 Book exam guide. We have free demos on the website for our customers to download if you still doubt our products, and you can check whether it is the right one for you before purchase as well. Our 1Z0-804 Book exam materials are famous among candidates.
Oracle 1Z0-804 Book - Just make your own decisions.
According to personal propensity and various understanding level of exam candidates, we have three versions of 1Z0-804 Book study guide for your reference. They are the versions of the PDF, Software and APP online. If you visit our website on our 1Z0-804 Book exam braindumps, then you may find that there are the respective features and detailed disparities of our 1Z0-804 Book simulating questions. And you can free donwload the demos to have a look.
With the rapid development of society, people pay more and more attention to knowledge and skills. So every year a large number of people take 1Z0-804 Book tests to prove their abilities.
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
BCS TTA-19 - Holding a professional certificate means you have paid more time and effort than your colleagues or messmates in your major, and have experienced more tests before succeed. Adobe AD0-E328 - Although everyone hopes to pass the exam, the difficulties in preparing for it should not be overlooked. We want to finish long term objectives through customer satisfaction and we have achieved it already by our excellent SAP C-THR94-2405 exam questions. Obtaining the ISQI CTFL_Syll_4.0 certification is not an easy task. VMware 5V0-92.22 - Java SE 7 Programmer II Exam study questions provide free trial service for consumers.
Updated: May 28, 2022