Please trust me, if you pay attention on dumps content, even just remember the questions and answers you will clear your exam surely. 1Z0-804 New Study Questions Pdf test braindump will be the right key to your exam success. As long as the road is right, success is near. Now we would like to share the advantages of our 1Z0-804 New Study Questions Pdf study dump to you, we hope you can spend several minutes on reading our introduction; you will benefit a lot from it. Our Java SE 7 Programmer II Exam exam questions are designed by a reliable and reputable company and our company has rich experience in doing research about the study materials. Our 1Z0-804 New Study Questions Pdf vce dumps offer you the best exam preparation materials which are updated regularly to keep the latest exam requirement.
1Z0-804 New Study Questions Pdf study material is suitable for all people.
Besides, our company's website purchase process holds security guarantee, so you needn’t be anxious about download and install our 1Z0-804 - Java SE 7 Programmer II Exam New Study Questions Pdf exam questions. So a wise and diligent person should absorb more knowledge when they are still young. At present, our 1Z0-804 Reliable Exam Questions Vce study prep has gained wide popularity among different age groups.
Considering all customers’ sincere requirements, 1Z0-804 New Study Questions Pdf test question persist in the principle of “Quality First and Clients Supreme” all along and promise to our candidates with plenty of high-quality products, considerate after-sale services as well as progressive management ideas. Numerous advantages of 1Z0-804 New Study Questions Pdf training materials are well-recognized, such as 99% pass rate in the exam, free trial before purchasing, secure privacy protection and so forth. From the customers’ point of view, our 1Z0-804 New Study Questions Pdf test question put all candidates’ demands as the top priority.
Oracle 1Z0-804 New Study Questions Pdf - So you can take a best preparation for the exam.
Every detail of our 1Z0-804 New Study Questions Pdf exam guide is going through professional evaluation and test. Other workers are also dedicated to their jobs. Even the proofreading works of the 1Z0-804 New Study Questions Pdf study materials are complex and difficult. They still attentively accomplish their tasks. Please have a try and give us an opportunity. Our 1Z0-804 New Study Questions Pdf preparation quide will totally amaze you and bring you good luck. And it deserves you to have a try!
Omgzlook's training tool has strong pertinence, which can help you save a lot of valuable time and energy to pass IT certification exam. Our exercises and answers and are very close true examination questions.
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.
Our Fortinet ICS-SCADA study materials absolutely can add more pleasure to your life. Lpi 701-100 - These training products to help you pass the exam, we guarantee to refund the full purchase cost. If you attach great importance to the protection of personal information and want to choose a very high security product, EMC D-MN-OE-23 real exam is definitely your first choice. Lpi 303-300 - But they need a lot of time to participate in the certification exam training courses. SAP C_LIXEA_2404 - Each of us is dreaming of being the best, but only a few people take that crucial step.
Updated: May 28, 2022