And you will find it is quite fast and convenient. Our 1Z0-804 Ppt real exam has been on the top of the industry over 10 years with passing rate up to 98 to 100 percent. Ranking the top of the similar industry, we are known worldwide by helping tens of thousands of exam candidates around the world. PayPal is one of the biggest international security payment systems. And we protect your personal information not be leaked. Though you can participate in the use of important factors, only the guarantee of high quality, to provide students with a better teaching method, thus our 1Z0-804 Ppt study dumps bring more outstanding teaching effect.
Java and Middleware 1Z0-804 Your life will be even more exciting.
With all the questons and answers of our 1Z0-804 - Java SE 7 Programmer II Exam Ppt study materials, your success is 100% guaranteed. Though the content of these three versions is the same, the displays have their different advantages. With our New 1Z0-804 Test Cram Review study materials, you can have different and pleasure study experience as well as pass New 1Z0-804 Test Cram Review exam easily.
We believe that you will like our products. According to the different demands from customers, the experts and professors designed three different versions for all customers. According to your need, you can choose the most suitable version of our Java SE 7 Programmer II Exam guide torrent for yourself.
Oracle 1Z0-804 Ppt - They are free demos.
On the one hand, our company hired the top experts in each qualification examination field to write the 1Z0-804 Ppt prepare dump, so as to ensure that our products have a very high quality, so that users can rest assured that the use of our research materials. On the other hand, under the guidance of high quality research materials, the rate of adoption of the 1Z0-804 Ppt exam guide is up to 98% to 100%. Of course, it is necessary to qualify for a qualifying exam, but more importantly, you will have more opportunities to get promoted in the workplace.
When we choose the employment work, you will meet a bottleneck, how to let a company to choose you to be a part of him? We would say ability, so how does that show up? There seems to be only one quantifiable standard to help us get a more competitive job, which is to get the test 1Z0-804 Pptcertification and obtain a qualification. If you want to have a good employment platform, then take office at the same time there is a great place to find that we have to pay attention to the importance of qualification examination.
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.
Anyway, what I want to tell you that our Huawei H13-511_V5.5 exam questions can really help you pass the exam faster. Why the clients speak highly of our EMC D-PDM-DY-23 exam dump? Our dedicated service, high quality and passing rate and diversified functions contribute greatly to the high prestige of our products. No matter where you are, you can choose your favorite equipment to study our SAP C-THR70-2404 learning materials. Our Microsoft AZ-900-KR study guide can help you improve in the shortest time. Watch carefully you will find that more and more people are willing to invest time and energy on the Microsoft SC-300 exam, because the exam is not achieved overnight, so many people are trying to find a suitable way.
Updated: May 28, 2022