The update for our 1Z0-804 Reviews learning guide will be free for one year and half price concession will be offered one year later. In addition to the constantly update, we have been working hard to improve the quality of our 1Z0-804 Reviews preparation prep. I believe that with the help of our study materials, the exam is no longer an annoyance. So we hold responsible tents when compiling the 1Z0-804 Reviews learning guide. The principles of our 1Z0-804 Reviewspractice materials can be expressed in words like clarity, correction and completeness. The rest of time you can go to solve all kinds of things in life, ensuring that you don't delay both study and work.
Java and Middleware 1Z0-804 They compile each answer and question carefully.
Our Oracle certification 1Z0-804 - Java SE 7 Programmer II Exam Reviews exam question bank is produced by Omgzlook's experts's continuously research of outline and previous exam. They tried their best to design the best 1Z0-804 Valid Test Vce Free certification training dumps from our company for all people. By our study materials, all people can prepare for their 1Z0-804 Valid Test Vce Free exam in the more efficient method.
Omgzlook provide a good after-sales service for all customers. If you choose to purchase Omgzlook products, Omgzlook will provide you with online service for 24 hours a day and one year free update service, which timely inform you the latest exam information to let you have a fully preparation. We can let you spend a small amount of time and money and pass the IT certification exam at the same time.
Oracle 1Z0-804 Reviews - As you know, life is like the sea.
Victory won't come to me unless I go to it. It is time to start to clear exam and obtain an IT certification to improve your competitor from our Oracle 1Z0-804 Reviews training PDF if you don't want to be discarded by epoch. Many IT workers have a nice improve after they get a useful certification. If you are willing, our 1Z0-804 Reviews training PDF can give you a good beginning. No need to doubt and worry, thousands of candidates choose our exam training materials, you shouldn't miss this high pass-rate 1Z0-804 Reviews training PDF materials.
Our effort in building the content of our 1Z0-804 Reviews learning questions lead to the development of learning guide and strengthen their perfection. Our 1Z0-804 Reviews practice braindumps beckon exam candidates around the world with our attractive characters.
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.
We provide our customers with the most reliable learning materials about Microsoft AZ-801 certification exam and the guarantee of pass. The high quality product like our HP HPE6-A72 study quiz has no need to advertise everywhere, and exerts influential effects which are obvious and everlasting during your preparation. As a wise person, it is better to choose our Salesforce Data-Cloud-Consultant study material without any doubts. You will find the exam is a piece of cake with the help of our Tableau TDS-C01 study materials. You just need 20-30 hours for preparation and feel confident to face the EMC D-PDM-DY-23 actual test.
Updated: May 28, 2022