Omgzlook's Oracle 1Z0-804 Reliable Test Answers exam training materials is no other sites in the world can match. Of course, this is not only the problem of quality, it goes without saying that our quality is certainly the best. More important is that Omgzlook's exam training materials is applicable to all the IT exam. Our experts have many years’ experience in this particular line of business, together with meticulous and professional attitude towards jobs. Their abilities are unquestionable, besides, 1Z0-804 Reliable Test Answers exam questions are priced reasonably with three kinds: the PDF, Software and APP online. We can help you pass the Oracle 1Z0-804 Reliable Test Answers exam smoothly.
Java and Middleware 1Z0-804 But they stick to work hard and never abandon.
Getting 1Z0-804 - Java SE 7 Programmer II Exam Reliable Test Answers certificate, you will get great benefits. During the trial process, you can learn about the three modes of 1Z0-804 Exam Voucher study quiz and whether the presentation and explanation of the topic in 1Z0-804 Exam Voucher preparation questions is consistent with what you want. If you are interested in our products, I believe that after your trial, you will certainly not hesitate to buy it.
After you buy the dumps, you can get a year free updates. As long as you want to update the dumps you have, you can get the latest updates within a year. Omgzlook does its best to provide you with the maximum convenience.
Oracle 1Z0-804 Reliable Test Answers - Most companies think highly of this character.
Nowadays, our learning methods become more and more convenient. Advances in technology allow us to learn freely on mobile devices. However, we understand that some candidates are still more accustomed to the paper, so our 1Z0-804 Reliable Test Answers study materials provide customers with a variety of versions to facilitate your learning process: the PDF, Software and APP online. These three versions of our 1Z0-804 Reliable Test Answers practice engine can provide you study on all conditions. Come and buy our 1Z0-804 Reliable Test Answers exam guide!
We provide one year studying assist service and one year free updates downloading of Oracle 1Z0-804 Reliable Test Answers exam questions. If you fail exam we support to exchange and full refund.
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
And you can free download the demos of our SAP C-C4H51-2405 learning guide on our website, it is easy, fast and convenient. Most IT workers prefer to choose our online test engine for their Genesys GCX-SCR exam prep because online version is more flexible and convenient. And whenever our customers have any problems on our Microsoft MB-280 practice engine, our experts will help them solve them at the first time. We guarantee that our SAP C_ARSUM_2404 exam prep is cost-efficient and affordable for most candidates who want to get certification quickly in their first try. Dell D-SRM-A-01 - Also, we just pick out the most important knowledge to learn.
Updated: May 28, 2022