At the moment, you must not miss Omgzlook 1Z0-804 Reliable Dumps Free certification training materials which are your unique choice. Even if you spend a small amount of time to prepare for 1Z0-804 Reliable Dumps Free certification, you can also pass the exam successfully with the help of Omgzlook Oracle 1Z0-804 Reliable Dumps Free braindump. Because Omgzlook exam dumps contain all questions you can encounter in the actual exam, all you need to do is to memorize these questions and answers which can help you 100% pass the exam. However, our 1Z0-804 Reliable Dumps Free training materials can offer better condition than traditional practice materials and can be used effectively. We treat it as our major responsibility to offer help so our 1Z0-804 Reliable Dumps Free practice guide can provide so much help, the most typical one is their efficiency. Oracle 1Z0-804 Reliable Dumps Free certificate will bring you many good helps and also help you get promoted.
Java and Middleware 1Z0-804 Just come and buy it!
Java and Middleware 1Z0-804 Reliable Dumps Free - Java SE 7 Programmer II Exam The dynamic society prods us to make better. We believe if you compare our New 1Z0-804 Exam Test training guide with the others, you will choose ours at once. Our New 1Z0-804 Exam Test study materials have a professional attitude at the very beginning of its creation.
As we know, our products can be recognized as the most helpful and the greatest 1Z0-804 Reliable Dumps Free study engine across the globe. Even though you are happy to hear this good news, you may think our price is higher than others. We can guarantee that we will keep the most appropriate price because we want to expand our reputation of 1Z0-804 Reliable Dumps Free preparation dumps in this line and create a global brand.
Oracle 1Z0-804 Reliable Dumps Free - Service is first!
In order to save a lot of unnecessary trouble to users, we have completed our Java SE 7 Programmer II Exam study questions research and development of online learning platform, users do not need to download and install, only need your digital devices have a browser, can be done online operation of the 1Z0-804 Reliable Dumps Free test guide. This kind of learning method is very convenient for the user, especially in the time of our fast pace to get Oracle certification. In addition, our test data is completely free of user's computer memory, will only consume a small amount of running memory when the user is using our product. At the same time, as long as the user ensures that the network is stable when using our 1Z0-804 Reliable Dumps Free training materials, all the operations of the learning material of can be applied perfectly.
The content of our 1Z0-804 Reliable Dumps Free study materials has always been kept up to date. We will inform you by E-mail when we have a new version.
1Z0-804 PDF DEMO:
QUESTION NO: 1
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: 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 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: 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: javac Test.java java ea Test
And the commands:
What is the result?
A.Compilation fails
B.Standard Edition Enterprise Edition Micro Edition
C.Standard Edition class java.lang.AssertionError Micro Edition
D.Standard Edition is printed and an Assertion Error is thrown
Answer: D
Explanation:
javac Test.java
will compile the program.
As for command line:
java ea Test
First the code will produce the output:
Standard Edition
See Note below.
The ea option will enable assertions. This will make the following line in the switch statement to be run:
default: assert false;
This will throw an assertion error. This error will be caught. An the class of the assertion error
(class java.lang.AssertionError) will be printed by the following line:
System.out.println(e.getClass());
Note:The java tool launches a Java application. It does this by starting a Java runtime environment, loading a specified class, and invoking that class's main method. The method declaration must look like the following:
public static void main(String args[])
Paramater ea:
-enableassertions[:<package name>"..." | :<class name> ] -ea[:<package name>"..." | :<class name> ]
Enable assertions. Assertions are disabled by default. With no arguments, enableassertions or -ea enables assertions.
Note 2:
An assertion is a statement in the JavaTM programming language that enables you to test your assumptions about your program. Each assertion contains a boolean expression that you believe will be true when the assertion
executes. If it is not true, the system will throw an error.
public class AssertionError extends Error
Thrown to indicate that an assertion has failed.
Note 3:
The javac command compiles Java source code into Java bytecodes. You then use the Java interpreter - the
java command - to interprete the Java bytecodes.
Reference:java - the Java application launcher
Reference:java.langClass AssertionError
PMI PMO-CP - You will also get more salary, and then you can provide a better life for yourself and your family. The client can decide which WGU Principles-of-Management version to choose according their hobbies and their practical conditions. Microsoft AZ-104-KR - So our customers can pass the exam with ease. Our APP online version of SAP C_TS410_2022 exam questions has the advantage of supporting all electronic equipment. HP HPE0-V28 - Our PDF version can be printed and you can take notes as you like.
Updated: May 28, 2022