The 1Z0-804 Cost Effective Dumps preparation products available here are provided in line with latest changes and updates in 1Z0-804 Cost Effective Dumps syllabus. The Oracle 1Z0-804 Cost Effective Dumps undergo several changes which are regularly accommodated to keep our customers well-informed. We have the complete list of popular 1Z0-804 Cost Effective Dumps exams. Our IT elite finally designs the best 1Z0-804 Cost Effective Dumps exam study materials by collecting the complex questions and analyzing the focal points of the exam over years. Even so, our team still insist to be updated ceaselessly, and during one year after you purchased 1Z0-804 Cost Effective Dumps exam software, we will immediately inform you once the 1Z0-804 Cost Effective Dumps exam software has any update. After our unremitting efforts, 1Z0-804 Cost Effective Dumps learning guide comes in everybody's expectation.
Java and Middleware 1Z0-804 This version is software.
Java and Middleware 1Z0-804 Cost Effective Dumps - Java SE 7 Programmer II Exam So you don’t need to wait for a long time and worry about the delivery time or any delay. The most important is that our test engine enables you practice 1Z0-804 Latest Test Guide exam pdf on the exact pattern of the actual exam. Our IT professionals have made their best efforts to offer you the latest 1Z0-804 Latest Test Guide study guide in a smart way for the certification exam preparation.
Because our materials not only has better quality than any other same learn products, but also can guarantee that you can pass the 1Z0-804 Cost Effective Dumps exam with ease. With the rapid development of computer, network, and semiconductor techniques, the market for people is becoming more and more hotly contested. Passing a 1Z0-804 Cost Effective Dumps exam to get a certificate will help you to look for a better job and get a higher salary.
Oracle 1Z0-804 Cost Effective Dumps - The first one is downloading efficiency.
We often regard learning for 1Z0-804 Cost Effective Dumps exam as a torture. Actually, learning also can become a pleasant process. With the development of technology, learning methods also take place great changes. With our 1Z0-804 Cost Effective Dumps study materials, all of your study can be completed on your computers because we have developed a kind of software which includes all the knowledge of the exam. The simulated and interactive learning environment of our 1Z0-804 Cost Effective Dumps practice engine will greatly arouse your learning interests.
We understand your drive of the certificate, so you have a focus already and that is a good start. The sources and content of our 1Z0-804 Cost Effective Dumps practice dumps are all based on the real 1Z0-804 Cost Effective Dumps exam.
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.
All ISACA CISM-CN online tests begin somewhere, and that is what the ISACA CISM-CN training course will do for you: create a foundation to build on. According to former exam candidates, more than 98 percent of customers culminate in success by their personal effort as well as our Juniper JN0-214 study materials. But if you use Lpi 701-100 exam materials, you will learn very little time and have a high pass rate. Only when you choose our ServiceNow CIS-VR guide torrent will you find it easier to pass this significant examination and have a sense of brand new experience of preparing the ServiceNow CIS-VR exam. Our Juniper JN0-252 training quiz is provided by PDF, Software/PC, and App/Online, which allows you to choose a suitable way to study anytime and anywhere.
Updated: May 28, 2022