With the dumps, you can pass Oracle 1Z0-804 Study Materials test with ease and get the certificate. Have you learned Omgzlook Oracle 1Z0-804 Study Materials exam dumps? Why do the people that have used Omgzlook dumps sing its praises? Do you really want to try it whether it have that so effective? Hurry to click Omgzlook to download our certification training materials. Every question provides you with demo and if you think our exam dumps are good, you can immediately purchase it. Excellent Oracle 1Z0-804 Study Materials study guide make candidates have clear studying direction to prepare for your test high efficiently without wasting too much extra time and energy. Do you feel bored about current jobs and current life? Go and come to obtain a useful certificate! Certainly, we ensure that each version of 1Z0-804 Study Materials exam materials will be helpful and comprehensive.
Java and Middleware 1Z0-804 Never feel sorry to invest yourself.
You can much more benefited form our 1Z0-804 - Java SE 7 Programmer II Exam Study Materials study guide. To choose us is to choose success! It is an incredible opportunity among all candidates fighting for the desirable exam outcome to have our New Exam 1Z0-804 Collection Sheet practice materials.
The 1Z0-804 Study Materials prep torrent we provide will cost you less time and energy. You only need relatively little time to review and prepare. After all, many people who prepare for the 1Z0-804 Study Materials exam, either the office workers or the students, are all busy.
Oracle 1Z0-804 Study Materials - (PDF, APP, software).
Our 1Z0-804 Study Materials test guides have a higher standard of practice and are rich in content. If you are anxious about how to get 1Z0-804 Study Materials certification, considering purchasing our 1Z0-804 Study Materials study tool is a wise choice and you will not feel regretted. Our learning materials will successfully promote your acquisition of certification. Our 1Z0-804 Study Materials qualification test closely follow changes in the exam outline and practice. In order to provide effective help to customers, on the one hand, the problems of our 1Z0-804 Study Materials test guides are designed fitting to the latest and basic knowledge. For difficult knowledge, we will use examples and chart to help you learn better. On the other hand, our 1Z0-804 Study Materials test guides also focus on key knowledge and points that are difficult to understand to help customers better absorb knowledge. Only when you personally experience our 1Z0-804 Study Materials qualification test can you better feel the benefits of our products. Join us soon.
Though the content of these three versions of our 1Z0-804 Study Materials study questions is the same, their displays are totally different. And you can be surprised to find that our 1Z0-804 Study Materials learning quiz is developed with the latest technologies as well.
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.
The good news is that according to statistics, under the help of our Cisco 300-740 learning dumps, the pass rate among our customers has reached as high as 98% to 100%. This time set your mind at rest with the help of our SASInstitute A00-415 guide quiz. Before you buy our product, you can download and try out it freely so you can have a good understanding of our EMC D-ECS-DS-23 quiz prep. Any difficult posers will be solved by our ATLASSIAN ACP-120 quiz guide. And if you find that your version of the EMC D-PDD-DY-23 practice guide is over one year, you can enjoy 50% discount if you buy it again.
Updated: May 28, 2022