Our 1Z0-804 Free Download real exam is written by hundreds of experts, and you can rest assured that the contents of the 1Z0-804 Free Download study materials are contained. After obtaining a large amount of first-hand information, our experts will continue to analyze and summarize and write the most comprehensive 1Z0-804 Free Download learning questions possible. And at the same time, we always keep our questions and answers to the most accurate and the latest. If you are really not sure which version you like best, you can also apply for multiple trial versions of our 1Z0-804 Free Download exam questions. We want our customers to make sensible decisions and stick to them. You can see that so many people are already ahead of you!
Java and Middleware 1Z0-804 And you can choose the favorite one.
According to the data that are proved and tested by our loyal customers, the pass rate of our 1Z0-804 - Java SE 7 Programmer II Exam Free Download exam questions is high as 98% to 100%. Many exam candidates are uninformed about the fact that our 1Z0-804 Latest Exam Camp Free preparation materials can help them with higher chance of getting success than others. It is all about efficiency and accuracy.
We all know that obtaining the 1Z0-804 Free Download certification is very difficult, and students who want to pass the exam often have to spend a lot of time and energy. After years of hard work, the experts finally developed a set of perfect learning materials 1Z0-804 Free Download practice materials that would allow the students to pass the exam easily. With our study materials, you only need 20-30 hours of study to successfully pass the exam and reach the peak of your career.
Oracle 1Z0-804 Free Download - What is more, we offer customer services 24/7.
Obtaining the 1Z0-804 Free Download certification is not an easy task. Only a few people can pass it successfully. If you want to be one of them, please allow me to recommend the 1Z0-804 Free Download learning questions from our company to you, the superb quality of 1Z0-804 Free Download exam braindumps we've developed for has successfully helped thousands of candidates to realize their dreams. And our 1Z0-804 Free Download study materials have helped so many customers pass the exam.
As a key to the success of your life, the benefits that 1Z0-804 Free Download exam guide can bring you are not measured by money. 1Z0-804 Free Download exam guide can not only help you pass the exam, but also help you master a new set of learning methods and teach you how to study efficiently, 1Z0-804 Free Download exam material will lead you to success.
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.
If you want to pass your exam and get the Microsoft MB-700 certification which is crucial for you successfully, I highly recommend that you should choose the Microsoft MB-700 study materials from our company so that you can get a good understanding of the exam that you are going to prepare for. There are also free demos of our ServiceNow CIS-SP study materials on the website that you can download before placing the orders. ISACA CISA - Details determine success or failure, so our every detail is strictly controlled. HP HP2-I57 - If you believe in our products this time, you will enjoy the happiness of success all your life EMC D-NWG-DS-00 - So we have tried our best to develop the three packages for you to choose.
Updated: May 28, 2022