With our 1Z0-804 Test practice materials, and your persistence towards success, you can be optimistic about your 1Z0-804 Test real dumps. Even you have bought our 1Z0-804 Test learning braindumps, and we will send the new updates to you one year long. On one hand, all content can radically give you the best backup to make progress. Trust me, you can't find anything better than our 1Z0-804 Test study materials. If you think I am exaggerating, you can try it for yourself. It is fast and convenient out of your imagination.
Java and Middleware 1Z0-804 Please give us a chance to prove.
Java and Middleware 1Z0-804 Test - Java SE 7 Programmer II Exam We will solve your problem as quickly as we can and provide the best service. As you can see, we never stop innovating new version of the 1Z0-804 Valid Exam Testking study materials. We really need your strong support.
In your every stage of review, our 1Z0-804 Test practice prep will make you satisfied. Our 1Z0-804 Test exam questions just focus on what is important and help you achieve your goal. With high-quality 1Z0-804 Test guide materials and flexible choices of learning mode, they would bring about the convenience and easiness for you.
Oracle 1Z0-804 Test - Need any help, please contact with us again!
In order to pass Oracle certification 1Z0-804 Test exam disposably, you must have a good preparation and a complete knowledge structure. Omgzlook can provide you the resources to meet your need.
Our questions and answers are based on the real exam and conform to the popular trend in the industry. You only need 20-30 hours to learn Java SE 7 Programmer II Exam exam torrent and prepare the exam.
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 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: 4
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: 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
ARDMS SPI - In today's competitive IT profession, if you want to stabilize your own position, you will have to prove your professional knowledge and technology level. To some extent, these SAP C_S4CFI_2402 certificates may determine your future. SAP C-ARP2P-2404 - There a galaxy of talents in the 21st century, but professional IT talents not so many. There are so many success examples by choosing our IIA IIA-CIA-Part2-KR guide quiz, so we believe you can be one of them. Because of its popularity, you can use the Omgzlook Oracle SAP C_THR97_2405 exam questions and answers to pass the exam.
Updated: May 28, 2022