No matter what kind of 1Z0-804 Guide Files learning materials you need, you can find the best one for you. Our expert team has spent a lot of time and energy just to provide you with the best quality 1Z0-804 Guide Filesstudy guide. 1Z0-804 Guide Files exam materials will definitely make you feel value for money. If you come to visit our website more times, you will buy our 1Z0-804 Guide Files practice engine at a more favorable price. With the most scientific content and professional materials 1Z0-804 Guide Files preparation materials are indispensable helps for your success. More importantly, we will promptly update our 1Z0-804 Guide Files exam materials based on the changes of the times and then send it to you timely.
Java and Middleware 1Z0-804 And we have become a popular brand in this field.
According to various predispositions of exam candidates, we made three versions of our 1Z0-804 - Java SE 7 Programmer II Exam Guide Files study materials for your reference: the PDF, Software and APP online. For many people, it’s no panic passing the 1Z0-804 Latest Practice Exam Fee exam in a short time. Luckily enough，as a professional company in the field of 1Z0-804 Latest Practice Exam Fee 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 Guide Files exam materials regularly. 98 to 100 percent of former exam candidates have achieved their success by the help of our 1Z0-804 Guide Files practice questions. And we have been treated as the best friend as our 1Z0-804 Guide Files training guide can really help and change the condition which our loyal customers are in and give them a better future.
Oracle 1Z0-804 Guide Files - 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 Guide Files 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 Guide Files 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 Guide Files certifications. Join us and you will be one of them.
Our company has been regarded as the most excellent online retailers of the 1Z0-804 Guide Files exam question. So our assistance is the most professional and superior.
1Z0-804 PDF DEMO:
QUESTION NO: 1
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: 2
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: 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 code fragment:
What is the result?
A.Java 7
B.Java 6
C.Java 7, Java 6
D.Java 7 java 6
E.Java
Answer: C
Explanation:
regex: Java / one or more anything !!! / ends with a digit so it is the source string
To be convenient for the learners, our APICS CSCP-KR certification questions provide the test practice software to help the learners check their learning results at any time. The high passing rate of CompTIA CAS-004 exam training also requires your efforts. Because the Cisco 300-635 cram simulator from our company are very useful for you to pass the exam and get the certification. SAP E-S4CPE-2023 - A large number of buyers pouring into our website every day can prove this. In the future, our IBM C1000-178 study materials will become the top selling products.
Updated: May 28, 2022