In 21st century, every country had entered the period of talent competition, therefore, we must begin to extend our 1Z0-804 Reliable Test Pattern personal skills, only by this can we become the pioneer among our competitors. At the same time, our competitors are trying to capture every opportunity and get a satisfying job. In this case, we need a professional 1Z0-804 Reliable Test Pattern certification, which will help us stand out of the crowd and knock out the door of great company. Our company is professional brand. There are a lot of experts and professors in the field in our company. What is more, our 1Z0-804 Reliable Test Pattern practice engine persists in creating a modern service oriented system and strive for providing more preferential activities for your convenience.
Java and Middleware 1Z0-804 And we have become a popular brand in this field.
Java and Middleware 1Z0-804 Reliable Test Pattern - Java SE 7 Programmer II Exam Untenable materials may waste your time and energy during preparation process. For many people, it’s no panic passing the Latest 1Z0-804 Exam Simulator Free exam in a short time. Luckily enough，as a professional company in the field of Latest 1Z0-804 Exam Simulator Free practice questions ,our products will revolutionize the issue.
We guarantee that you can pass the exam at one time even within one week based on practicing our 1Z0-804 Reliable Test Pattern exam materials regularly. 98 to 100 percent of former exam candidates have achieved their success by the help of our 1Z0-804 Reliable Test Pattern practice questions. And we have been treated as the best friend as our 1Z0-804 Reliable Test Pattern training guide can really help and change the condition which our loyal customers are in and give them a better future.
Oracle 1Z0-804 Reliable Test Pattern - As we all know, time and tide waits for no man.
Time and tide wait for no man, if you want to save time, please try to use our 1Z0-804 Reliable Test Pattern preparation exam, it will cherish every minute of you and it will help you to create your life value. With the high pass rate of our 1Z0-804 Reliable Test Pattern exam questions as 98% to 100% which is unbeatable in the market, we are proud to say that we have helped tens of thousands of our customers achieve their dreams and got their 1Z0-804 Reliable Test Pattern certifications. Join us and you will be one of them.
Excellent guidance is indispensable. If you urgently need help, come to buy our study materials.
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 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
QUESTION NO: 5
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.
To be convenient for the learners, our SAP C-THR82-2405 certification questions provide the test practice software to help the learners check their learning results at any time. The high passing rate of SAP C_THR87_2405 exam training also requires your efforts. If you also look forward to change your present boring life, maybe trying your best to have the EMC D-CS-DS-23 latest questions are a good choice for you. Fortinet FCP_FWB_AD-7.4 - A large number of buyers pouring into our website every day can prove this. In the future, our Oracle 1z0-1072-24 study materials will become the top selling products.
Updated: May 28, 2022