If you don't pass the exam, we will take a full refund to you. Before you choose to buy the Omgzlook products before, you can free download part of the exercises and answers about Oracle certification 1Z0-804 Latest Real Test Questions exam as a try, then you will be more confident to choose Omgzlook's products to prepare your Oracle certification 1Z0-804 Latest Real Test Questions exam. Omgzlook is a good website for Oracle certification 1Z0-804 Latest Real Test Questions exams to provide short-term effective training. We claim that you can be ready to attend your exam after studying with our 1Z0-804 Latest Real Test Questionsstudy guide for 20 to 30 hours because we have been professional on this career for years. We can’t deny that the pursuit of success can encourage us to make greater progress. Omgzlook is a website which can give much convenience and meet the needs and achieve dreams for many people participating IT certification exams.
Java and Middleware 1Z0-804 You can totally relay on us.
We will continue improving 1Z0-804 - Java SE 7 Programmer II Exam Latest Real Test Questions exam study materials. Second, it is convenient for you to read and make notes with our versions of Latest Exam 1Z0-804 Sample Questions exam materials. Last but not least, we will provide considerate on line after sale service for you in twenty four hours a day, seven days a week.
To pass this exam also needs a lot of preparation. The 1Z0-804 Latest Real Test Questions exam materials provided by Omgzlook are collected and sorted out by experienced team. Now you can have these precious materials.
Oracle 1Z0-804 Latest Real Test Questions - You still can pass the exam with our help.
Nowadays, using computer-aided software to pass the 1Z0-804 Latest Real Test Questions exam has become a new trend. Because the new technology enjoys a distinct advantage, that is convenient and comprehensive. In order to follow this trend, our company product such a 1Z0-804 Latest Real Test Questions exam questions that can bring you the combination of traditional and novel ways of studying. The passing rate of our study material is up to 99%. If you are not fortune enough to acquire the 1Z0-804 Latest Real Test Questions certification at once, you can unlimitedly use our product at different discounts until you reach your goal and let your dream comes true.
And you can free download the demos of the 1Z0-804 Latest Real Test Questions practice engine to have a experience before payment. During the operation of the 1Z0-804 Latest Real Test Questions study materials on your computers, the running systems of the 1Z0-804 Latest Real Test Questions study guide will be flexible, which saves you a lot of troubles and help you concentrate on study.
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: 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
QUESTION NO: 4
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: 5
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.
Our research and development team not only study what questions will come up in the Microsoft AZ-204-KR exam, but also design powerful study tools like exam simulation software.The content of our Microsoft AZ-204-KR practice materials is chosen so carefully that all the questions for the exam are contained. Because it can help you prepare for the Nutanix NCP-MCA exam. We boost professional expert team to organize and compile the Salesforce Education-Cloud-Consultant training guide diligently and provide the great service. It means that if you do not persist in preparing for the Salesforce Marketing-Cloud-Developer exam, you are doomed to failure. More importantly, if you take our products into consideration, our SAP C-THR70-2404 study materials will bring a good academic outcome for you.
Updated: May 28, 2022