All the update service is free during one year after you purchased our 1Z0-804 Valid Study Guide Files exam software. To keep constantly update can be walk in front, which is also our Omgzlook's idea. Therefore, we regularly check 1Z0-804 Valid Study Guide Files exam to find whether has update or not. The manufacture of our 1Z0-804 Valid Study Guide Files real exam is completely according with strict standard. We do not tolerate any small mistake. Now are you in preparation for 1Z0-804 Valid Study Guide Files exam? If so, you must be a man with targets.
Java and Middleware 1Z0-804 Our products are just suitable for you.
Java and Middleware 1Z0-804 Valid Study Guide Files - Java SE 7 Programmer II Exam The training materials of Omgzlook are developed by many IT experts' continuously using their experience and knowledge to study, and the quality is very good and have very high accuracy. You will get your Reliable Study Questions 1Z0-804 Files certification with little time and energy by the help of out dumps. Omgzlook is constantly updated in accordance with the changing requirements of the Oracle certification.
If you buy the Omgzlook's products, we will not only spare no effort to help you pass the certification exam, but also provide a free update and upgrade service. If the official change the outline of the certification exam, we will notify customers immediately. If we have any updated version of test software, it will be immediately pushed to customers.
Our Oracle 1Z0-804 Valid Study Guide Files latest study guide can help you.
Omgzlook is an excellent source of information on IT Certifications. In the Omgzlook, you can find study skills and learning materials for your exam. Omgzlook's Oracle 1Z0-804 Valid Study Guide Files training materials are studied by the experienced IT experts. It has a strong accuracy and logic. To encounter Omgzlook, you will encounter the best training materials. You can rest assured that using our Oracle 1Z0-804 Valid Study Guide Files exam training materials. With it, you have done fully prepared to meet this exam.
Most returned customers said that our 1Z0-804 Valid Study Guide Files dumps pdf covers the big part of main content of the certification exam. Questions and answers from our 1Z0-804 Valid Study Guide Files free download files are tested by our certified professionals and the accuracy of our questions are 100% guaranteed.
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
EMC D-RP-DY-A-24 - Because of its high efficiency, you can achieve remarkable results. We strive for perfection all these years and get satisfactory results with concerted cooperation between experts, and all questions points in our Juniper JN0-460 real exam are devised and written base on the real exam. Omgzlook Oracle Huawei H28-155_V1.0 exam dumps are the best reference materials. Although you will take each Microsoft MS-721 online test one at a time - each one builds upon the previous. Omgzlook won a good reputation by these candidates that have passed Oracle EMC D-DS-OP-23 certification exam.
Updated: May 28, 2022