The free 1Z0-804 Questions exam updates feature is one of the most helpful features for the candidates to get their preparation in the best manner with latest changes. The Oracle introduces changes in the 1Z0-804 Questions format and topics, which are reported to our valued customers. In this manner, a constant update feature is being offered to 1Z0-804 Questions exam customers. Second, you can get our 1Z0-804 Questions practice dumps only in 5 to 10 minutes after payment, which enables you to devote yourself to study as soon as possible. Last but not least, you will get the privilege to enjoy free renewal of our 1Z0-804 Questions preparation materials during the whole year. The sooner you download and use 1Z0-804 Questions training materials the sooner you get the 1Z0-804 Questions certificate.
Java and Middleware 1Z0-804 Why not have a try?
If there is new information about the exam, you will receive an email about the newest information about the 1Z0-804 - Java SE 7 Programmer II Exam Questions learning dumps. With our Latest 1Z0-804 Exam Name exam questions, you will easily get the favor of executives and successfully enter the gates of famous companies. You will have higher wages and a better development platform.
Our 1Z0-804 Questions study guide design three different versions for all customers. These three different versions include PDF version, software version and online version, they can help customers solve any problems in use, meet all their needs. Although the three major versions of our 1Z0-804 Questions exam dumps provide a demo of the same content for all customers, they will meet different unique requirements from a variety of users based on specific functionality.
Oracle 1Z0-804 Questions - Now they have a better life.
If we waste a little bit of time, we will miss a lot of opportunities. If we miss the opportunity, we will accomplish nothing. Then, life becomes meaningless. Our 1Z0-804 Questions preparation exam have taken this into account, so in order to save our customer’s precious time, the experts in our company did everything they could to prepare our 1Z0-804 Questions study materials for those who need to improve themselves quickly in a short time to pass the exam to get the 1Z0-804 Questions certification.
Once you choose our training materials, you chose hope. Our learning materials are based on the customer's point of view and fully consider the needs of our customers.
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:
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: 4
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: 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
Microsoft PL-900 - The client only need to spare 1-2 hours to learn our Java SE 7 Programmer II Exam study question each day or learn them in the weekends. The staff of Oracle 1z0-1123-24 study materials is online 24 hours a day, seven days a week. EMC D-PCR-DY-23 - As a matter of fact, we receive thousands of the warm feedbacks to thank us for helping them pass the exam. Omgzlook is famous for our company made these Fortinet FCP_FMG_AD-7.4 exam questions with accountability. SAP C_BW4H_2404 - In the end, you will become an excellent talent.
Updated: May 28, 2022