If you try on it, you will find that the operation systems of the 1Z0-804 Exam Notes exam questions we design have strong compatibility. So the running totally has no problem. And you can free download the demos of the 1Z0-804 Exam Notes practice engine to have a experience before payment. And our 1Z0-804 Exam Notesstudy materials have three formats which help you to read, test and study anytime, anywhere. This means with our products you can prepare for 1Z0-804 Exam Notes exam efficiently. We believe that if you purchase 1Z0-804 Exam Notes test guide from our company and take it seriously into consideration, you will gain a suitable study plan to help you to pass your exam in the shortest time.
Our 1Z0-804 Exam Notes exam torrent carries no viruses.
Of course, 1Z0-804 - Java SE 7 Programmer II Exam Exam Notes learning materials produced several versions of the product to meet the requirements of different users. As long as you study our 1Z0-804 Hottest Certification training engine and followe it step by step, we believe you will achieve your dream easily. Every question from our 1Z0-804 Hottest Certification study materials is carefully elaborated and the content of our 1Z0-804 Hottest Certification exam questions involves the professional qualification certificate examination.
1Z0-804 Exam Notes training materials are not only the domestic market, but also the international high-end market. We are studying some learning models suitable for high-end users. Our research materials have many advantages.
Oracle 1Z0-804 Exam Notes - Omgzlook can escort you to pass the IT exam.
Have you ever tried our IT exam certification software provided by our Omgzlook? If you have, you will use our 1Z0-804 Exam Notes exam software with no doubt. If not, your usage of our dump this time will make you treat our Omgzlook as the necessary choice to prepare for other IT certification exams later. Our 1Z0-804 Exam Notes exam software is developed by our IT elite through analyzing real 1Z0-804 Exam Notes exam content for years, and there are three version including PDF version, online version and software version for you to choose.
Our strength will make you incredible. You can try a part of the questions and answers about Oracle 1Z0-804 Exam Notes exam to test our reliability.
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
Microsoft DP-300-KR - We try our best to ensure 100% pass rate for you. SAP C_THR81_2311 - The opportunity always belongs to a person who has the preparation. Huawei H13-629_V3.0 - So our Omgzlook will provide a exam simulation for you to experience the real exam model before real exam. And with the aid of SAP C_IEE2E_2404 certification test, you can improve your skills and master some useful techniques in your job so that you can finish your work better and demonstrate your great ability before other people. Also you can ask us any questions about SAP C_TS422_2023 exam any time as you like.
Updated: May 28, 2022