Firstly we provide one-year service warranty for every buyer who purchased 1Z0-804 Materials valid exam collection materials. Every buyer can share one year free updates and preparation assist. Secondly if you want to get the free updates not just for one year, you want to still get the new version of Oracle 1Z0-804 Materials valid exam collection materials after one year, you share 50% discount for the second year. After you purchase our dump, we will inform you the 1Z0-804 Materials update messages at the first time; this service is free, because when you purchase our study materials, you have bought all your 1Z0-804 Materials exam related assistance. The world is changing, so we should keep up with the changing world's step as much as possible. We are confident in the ability of 1Z0-804 Materials exam torrent and we also want to our candidates feel confident in our certification exam materials.
Java and Middleware 1Z0-804 The knowledge you have learned is priceless.
You can much more benefited form our 1Z0-804 - Java SE 7 Programmer II Exam Materials study guide. To choose us is to choose success! It is an incredible opportunity among all candidates fighting for the desirable exam outcome to have our Dumps 1Z0-804 Discount practice materials.
But the 1Z0-804 Materials test prep we provide are compiled elaborately and it makes you use less time and energy to learn and provide the study materials of high quality and seizes the focus the exam. It lets you master the most information and costs you the least time and energy. The 1Z0-804 Materials prep torrent we provide will cost you less time and energy.
Oracle 1Z0-804 Materials - This is a fair principle.
Dreaming to be a certified professional in this line? Our 1Z0-804 Materials study materials are befitting choices. We made real test materials in three accessible formats for your inclinations. (PDF, APP, software). Our website is an excellent platform, which provides the questions of these versions of our 1Z0-804 Materials exam questions compiled by experts. By browsing this website, all there versions of our 1Z0-804 Materials pratice engine can be chosen according to your taste or preference.
On the other hand, our 1Z0-804 Materials test guides also focus on key knowledge and points that are difficult to understand to help customers better absorb knowledge. Only when you personally experience our 1Z0-804 Materials qualification test can you better feel the benefits of 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
Though the content of these three versions of our Google Professional-Cloud-Network-Engineer study questions is the same, their displays are totally different. It is strongly proved that we are professonal in this career and our Juniper JN0-649 exam braindumps are very popular. This time set your mind at rest with the help of our Lpi 300-300 guide quiz. Before you buy our product, you can download and try out it freely so you can have a good understanding of our EMC D-OME-OE-A-24 quiz prep. Any difficult posers will be solved by our CWNP CWAP-404 quiz guide.
Updated: May 28, 2022