Our 1Z0-804 Test Format materials are more than a study materials, this is a compilation of the actual questions and answers from the 1Z0-804 Test Format exam. Our brilliant materials are the product created by those professionals who have extensive experience of designing exam study material. So many people give up the chance of obtaining a certificate because of the difficulty of the 1Z0-804 Test Format exam. As you see, all of the three versions of our 1Z0-804 Test Format exam dumps are helpful for you to get the 1Z0-804 Test Format certification. So there is another choice for you to purchase the comprehensive version which contains all the three formats. As long as you pass the exam, you will take a step closer to your goal.
Java and Middleware 1Z0-804 It can help you to pass the exam successfully.
With 1Z0-804 - Java SE 7 Programmer II Exam Test Format study engine, you will get rid of the dilemma that you work hard but cannot improve. You can choose other products, but you have to know that Omgzlook can bring you infinite interests. Only Omgzlook can guarantee you 100% success.
In order to facilitate the user's offline reading, the 1Z0-804 Test Format study braindumps can better use the time of debris to learn, especially to develop PDF mode for users. In this mode, users can know the 1Z0-804 Test Format prep guide inside the learning materials to download and print, easy to take notes on the paper, and weak link of their memory, at the same time, every user can be downloaded unlimited number of learning, greatly improve the efficiency of the users with our 1Z0-804 Test Format exam questions. Or you will forget the so-called good, although all kinds of digital device convenient now we read online, but many of us are used by written way to deepen their memory patterns.
Oracle 1Z0-804 Test Format - So try to trust us.
Have you signed up for Oracle 1Z0-804 Test Format exam? Will masses of reviewing materials and questions give you a headache? Omgzlook can help you to solve this problem. It is absolutely trustworthy website. Only if you choose to use exam dumps Omgzlook provides, you can absolutely pass your exam successfully. You spend lots of time on these reviewing materials you don't know whether it is useful to you, rather than experiencing the service Omgzlook provides for you. So, hurry to take action.
Our windows software and online test engine of the 1Z0-804 Test Format exam questions are suitable for all age groups. At the same time, our operation system is durable and powerful.
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 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: 4
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.
QUESTION NO: 5
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
Our Omgzlook team devote themselves to studying the best methods to help you pass Fortinet FCSS_SOC_AN-7.4 exam certification. Salesforce Data-Cloud-Consultant - After you have used our products, you will certainly have your own experience. What we have done is to make you more confident in Cisco 700-805 exam. Adobe AD0-E906 - When choosing a product, you will be entangled. While others are playing games online, you can do online Dell D-PWF-DY-A-00 exam questions.
Updated: May 28, 2022