Our company always feedbacks our candidates with highly-qualified 1Z0-804 Valid Practice Questions Ppt study guide and technical excellence and continuously developing the most professional 1Z0-804 Valid Practice Questions Ppt exam materials. You can see the high pass rate as 98% to 100%, which is unmarched in the market. What is more, our 1Z0-804 Valid Practice Questions Ppt practice engine persists in creating a modern service oriented system and strive for providing more preferential activities for your convenience. You can try the trial version from our company before you buy our 1Z0-804 Valid Practice Questions Ppt test practice files. The trial version will provide you with the demo. And our 1Z0-804 Valid Practice Questions Ppt can help them achieve all of these more easily and leisurely.
Java and Middleware 1Z0-804 So our product is a good choice for you.
Materials trends are not always easy to forecast on our study guide, but they have predictable pattern for them by ten-year experience who often accurately predict points of knowledge occurring in next 1Z0-804 - Java SE 7 Programmer II Exam Valid Practice Questions Ppt preparation materials. And they are trained specially and professionlly to know every detail about our 1Z0-804 Reliable Exam Papers learning prep. If you have never bought our 1Z0-804 Reliable Exam Papers exam materials on the website before, we understand you may encounter many problems such as payment or downloading 1Z0-804 Reliable Exam Papers practice quiz and so on, contact with us, we will be there.
We have been always trying to make every effort to consolidate and keep a close relationship with customer by improving the quality of our 1Z0-804 Valid Practice Questions Ppt practice materials. So our 1Z0-804 Valid Practice Questions Ppt learning guide is written to convey not only high quality of them, but in a friendly, helpfully, courteously to the points to secure more complete understanding for you. And the content of our 1Z0-804 Valid Practice Questions Ppt study questions is easy to understand.
Oracle 1Z0-804 Valid Practice Questions Ppt - And we have become a popular brand in this field.
According to various predispositions of exam candidates, we made three versions of our 1Z0-804 Valid Practice Questions Ppt study materials for your reference: the PDF, Software and APP online. And the content of them is the same though the displays are different. Untenable materials may waste your time and energy during preparation process. But our 1Z0-804 Valid Practice Questions Ppt practice braindumps are the leader in the market for ten years. As long as you try our 1Z0-804 Valid Practice Questions Ppt exam questions, we believe you will fall in love with it.
For many people, it’s no panic passing the 1Z0-804 Valid Practice Questions Ppt exam in a short time. Luckily enough，as a professional company in the field of 1Z0-804 Valid Practice Questions Ppt practice questions ,our products will revolutionize the issue.
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
98 to 100 percent of former exam candidates have achieved their success by the help of our API API-510 practice questions. I believe every candidate wants to buy IBM C1000-173 learning bbraindumps that with a high pass rate, because the data show at least two parts of the IBM C1000-173 exam guide, the quality and the validity which are the pass guarantee to our candidates. Adobe AD0-E716 - As we all know, time and tide waits for no man. With the high pass rate of our EMC D-NWR-DY-23 exam questions as 98% to 100% which is unbeatable in the market, we are proud to say that we have helped tens of thousands of our customers achieve their dreams and got their EMC D-NWR-DY-23 certifications. Our company has been regarded as the most excellent online retailers of the Microsoft DP-203-KR exam question.
Updated: May 28, 2022