So if you are in a dark space, our 1Z0-804 Vce Torrent study guide can inspire you make great improvements. With the high pass rate of our 1Z0-804 Vce Torrent learing engine as 98% to 100%, you can be confident and ready to pass the exam easily. There are totally three versions of 1Z0-804 Vce Torrent practice materials which are the most suitable versions for you: PDF, software and app versions. Our learning materials are practically tested, choosing our 1Z0-804 Vce Torrent exam guide, you will get unexpected surprise. In today's society, everyone wants to find a good job and gain a higher social status. (PDF, APP, software).
Java and Middleware 1Z0-804 Nowadays, it is hard to find a desirable job.
Java and Middleware 1Z0-804 Vce Torrent - Java SE 7 Programmer II Exam It is more and more important for us to keep pace with the changeable world and improve ourselves for the beautiful life. Luckily, we are going to tell you a good new that the demo of the New Exam 1Z0-804 Guide Materials study materials are easily available in our company. If you buy the study materials from our company, we are glad to offer you with the best demo of our study materials.
Whether you are newbie or experienced exam candidates, our 1Z0-804 Vce Torrent study guide will relieve you of tremendous pressure and help you conquer the difficulties with efficiency. If you study with our 1Z0-804 Vce Torrent practice engine for 20 to 30 hours, we can claim that you can pass the exam as easy as a pie. Why not have a try?
Oracle 1Z0-804 Vce Torrent - Now they have a better life.
If we waste a little bit of time, we will miss a lot of opportunities. If we miss the opportunity, we will accomplish nothing. Then, life becomes meaningless. Our 1Z0-804 Vce Torrent preparation exam have taken this into account, so in order to save our customer’s precious time, the experts in our company did everything they could to prepare our 1Z0-804 Vce Torrent study materials for those who need to improve themselves quickly in a short time to pass the exam to get the 1Z0-804 Vce Torrent certification.
Our reputation is earned by high-quality of our learning materials. Once you choose our training materials, you chose hope.
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.
IBM C1000-182 - Commonly speaking, people like the in-service staff or the students are busy and don’t have enough time to prepare the exam. The staff of Autodesk ACP-01101 study materials is online 24 hours a day, seven days a week. Our ServiceNow CIS-VR training guide has been well known in the market. We understand you can have more chances getting higher salary or acceptance instead of preparing for the HP HPE0-V27 exam. Pegasystems PEGAPCDC87V1 - In the end, you will become an excellent talent.
Updated: May 28, 2022