The best part of 1Z0-804 Questions Vce exam dumps are their relevance, comprehensiveness and precision. You need not to try any other source for1Z0-804 Questions Vce exam preparation. The innovatively crafted dumps will serve you the best; imparting you information in fewer number of questions and answers. However, it is difficult for many people to get a 1Z0-804 Questions Vce certification, but we are here to offer you help. We have helped tens of thousands of our customers achieve their certification with our excellent 1Z0-804 Questions Vce exam braindumps. You will be much awarded with our 1Z0-804 Questions Vce learning engine.
You final purpose is to get the 1Z0-804 Questions Vce certificate.
Our high-quality 1Z0-804 - Java SE 7 Programmer II Exam Questions Vce} learning guide help the students know how to choose suitable for their own learning method, our 1Z0-804 - Java SE 7 Programmer II Exam Questions Vce study materials are a very good option. More importantly, it is evident to all that the 1Z0-804 Reliable Study Guide Sheet training materials from our company have a high quality, and we can make sure that the quality of our products will be higher than other study materials in the market. If you want to pass the 1Z0-804 Reliable Study Guide Sheet exam and get the related certification in the shortest time, choosing the 1Z0-804 Reliable Study Guide Sheet training materials from our company will be in the best interests of all people.
All the preparation material reflects latest updates in 1Z0-804 Questions Vce certification exam pattern. You may now download the 1Z0-804 Questions Vce PDF documents in your smart devices and lug it along with you. You can effortlessly yield the printouts of 1Z0-804 Questions Vce exam study material as well, PDF files make it extremely simple for you to switch to any topics with a click.
Oracle 1Z0-804 Questions Vce - We can provide you with a free trial version.
Unlike other kinds of exam files which take several days to wait for delivery from the date of making a purchase, our 1Z0-804 Questions Vce study materials can offer you immediate delivery after you have paid for them. The moment you money has been transferred to our account, and our system will send our 1Z0-804 Questions Vcetraining dumps to your mail boxes so that you can download 1Z0-804 Questions Vce exam questions directly. It is fast and convenient out of your imagination.
Using our products does not take you too much time but you can get a very high rate of return. Our 1Z0-804 Questions Vce quiz guide is of high quality, which mainly reflected in the passing rate.
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.
Meanwhile, if you want to keep studying this course , you can still enjoy the well-rounded services by ARDMS SPI test prep, our after-sale services can update your existing ARDMS SPI study quiz within a year and a discount more than one year. Moreover, to write the Up-to-date WGU Managing-Human-Capital practice braindumps, they never stop the pace of being better. Secondly, you can get our Cisco 300-430 practice test only in 5 to 10 minutes after payment, which enables you to devote yourself to study as soon as possible. With our test-oriented Citrix 1Y0-204 test prep in hand, we guarantee that you can pass the Citrix 1Y0-204 exam as easy as blowing away the dust, as long as you guarantee 20 to 30 hours practice with our Citrix 1Y0-204 study materials. Our Microsoft MB-230 study guide has three formats which can meet your different needs: PDF, software and online.
Updated: May 28, 2022