After decades of hard work, our products are currently in a leading position in the same kind of education market, our 1Z0-804 Reliable Exam Topics Pdf learning materials, with their excellent quality and constantly improved operating system, In many areas won the unanimous endorsement of many international customers. Advanced operating systems enable users to quickly log in and use, in constant practice and theoretical research, our 1Z0-804 Reliable Exam Topics Pdf learning materials have come up with more efficient operating system to meet user needs, so we can assure users here , after user payment , users can perform a review of the 1Z0-804 Reliable Exam Topics Pdf exam in real time , because our advanced operating system will immediately send users 1Z0-804 Reliable Exam Topics Pdf learning material to the email address where they are paying , this greatly facilitates the user, lets the user be able to save more study time. Our 1Z0-804 Reliable Exam Topics Pdf exam questions are famous for its high-efficiency and high pass rate as 98% to 100%. Buy our 1Z0-804 Reliable Exam Topics Pdf study guide, and you will pass the exam easily. If you are craving for getting promotion in your company, you must master some special skills which no one can surpass you.
Java and Middleware 1Z0-804 Omgzlook will help you achieve your dream.
It is known to us that our 1Z0-804 - Java SE 7 Programmer II Exam Reliable Exam Topics Pdf study materials have been keeping a high pass rate all the time. Do not spend too much time and money, as long as you have Omgzlook learning materials you will easily pass the exam. In order to help you more Omgzlook the Oracle 1Z0-804 Training For Exam exam eliminate tension of the candidates on the Internet.
Software version-It support simulation test system, and times of setup has no restriction. Remember this version support Windows system users only. App online version-Be suitable to all kinds of equipment or digital devices.
Oracle 1Z0-804 Reliable Exam Topics Pdf - We guarantee that you can pass the exam easily.
Have you ever tried our IT exam certification software provided by our Omgzlook? If you have, you will use our 1Z0-804 Reliable Exam Topics Pdf 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 Reliable Exam Topics Pdf exam software is developed by our IT elite through analyzing real 1Z0-804 Reliable Exam Topics Pdf exam content for years, and there are three version including PDF version, online version and software version for you to choose.
Omgzlook is a website that provide accurate exam materials for people who want to participate in the IT certification. Omgzlook can help a lot of IT professionals to enhance their career blueprint.
1Z0-804 PDF DEMO:
QUESTION NO: 1
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: 2
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: 3
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: 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.
The secret that Omgzlook helps many candidates pass SAP C_THR94_2405 exam is Oracle exam questions attentively studied by our professional IT team for years, and the detailed answer analysis. CompTIA CAS-004 - If you choose Omgzlook study guide, you will find the test questions and test answers are certainly different and high-quality, which is the royal road to success. Microsoft MB-820 - So our Omgzlook will provide a exam simulation for you to experience the real exam model before real exam. And with the aid of Network Appliance NS0-521 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 Tableau TCA-C01 exam any time as you like.
Updated: May 28, 2022