We Promise we will very happy to answer your question on our 1Z0-804 Pdf Demo Download exam braindumps with more patience and enthusiasm and try our utmost to help you out of some troubles. So don’t hesitate to buy our {Examcode} study materials, we will give you the high-quality product and professional customer services. As long as you study with our1Z0-804 Pdf Demo Download learning guide, you will be sure to get your dreaming certification. You still can pass the exam with our help. The key point is that you are serious on our 1Z0-804 Pdf Demo Download exam questions and not just kidding. In order to follow this trend, our company product such a 1Z0-804 Pdf Demo Download exam questions that can bring you the combination of traditional and novel ways of studying.
Because it can help you prepare for the 1Z0-804 Pdf Demo Download exam.
We boost professional expert team to organize and compile the 1Z0-804 - Java SE 7 Programmer II Exam Pdf Demo Download training guide diligently and provide the great service. It means that if you do not persist in preparing for the Valid Test 1Z0-804 Study Guide exam, you are doomed to failure. So it is of great importance for a lot of people who want to pass the exam and get the related certification to stick to studying and keep an optimistic mind.
If you purchase our 1Z0-804 Pdf Demo Download preparation questions, it will be very easy for you to easily and efficiently find the exam focus. More importantly, if you take our products into consideration, our 1Z0-804 Pdf Demo Download study materials will bring a good academic outcome for you. At the same time, we believe that our 1Z0-804 Pdf Demo Download training quiz will be very useful for you to have high quality learning time during your learning process.
Oracle 1Z0-804 Pdf Demo Download - Our research materials have many advantages.
Through all these years' experience, our 1Z0-804 Pdf Demo Download training materials are becoming more and more prefect. Moreover, we hold considerate after-sales services and sense-and-respond tenet all these years. So if you get any questions of our 1Z0-804 Pdf Demo Download learning guide, please get us informed. It means we will deal with your doubts with our 1Z0-804 Pdf Demo Download practice materials 24/7 with efficiency and patience.
You really can't find a more cost-effective product than 1Z0-804 Pdf Demo Download learning quiz! Our company wants more people to be able to use our products.
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
SAP C-BW4H-2404 - All exams from different suppliers will be easy to handle. ISACA CISM-CN - Firstly, PDF version is easy to read and print. In the matter of quality, our SAP C_BW4H_214 practice engine is unsustainable with reasonable prices. Salesforce B2C-Commerce-Developer - The next thing you have to do is stick with it. An increasing number of people have become aware of that it is very important for us to gain the SAP C-BW4H-2404 exam questions in a short time.
Updated: May 28, 2022