1Z0-804 Valid Exam Lab Questions training materials have now provided thousands of online test papers for the majority of test takers to perform simulation exercises, helped tens of thousands of candidates pass the 1Z0-804 Valid Exam Lab Questions exam, and got their own dream industry certificates 1Z0-804 Valid Exam Lab Questions exam questions have an extensive coverage of test subjects and have a large volume of test questions, and an online update program. 1Z0-804 Valid Exam Lab Questions training materials are not only the passbooks for students passing all kinds of professional examinations, but also the professional tools for students to review examinations. In the past few years, 1Z0-804 Valid Exam Lab Questions exam torrent hasreceived the trust of a large number of students and also helped a large number of students pass the exam smoothly. We also hope our 1Z0-804 Valid Exam Lab Questions exam materials can help more ambitious people pass 1Z0-804 Valid Exam Lab Questions exam. Our professional team checks the update of every exam materials every day, so please rest assured that the 1Z0-804 Valid Exam Lab Questions exam software you are using must contain the latest and most information. As the saying goes, to sensible men, every day is a day of reckoning.
Java and Middleware 1Z0-804 Then you will be confident in the actual test.
Our 1Z0-804 - Java SE 7 Programmer II Exam Valid Exam Lab Questions training quiz will be your best teacher who helps you to find the key and difficulty of the exam, so that you no longer feel confused when review. Well-pointed preparation for your test will help you save a lot of time. Oracle 1Z0-804 Latest Test Format exam cram PDF will be great helper for your coming exam definitely.
Our study materials will help you get the according certification you want to have. Believe me, after using our study materials, you will improve your work efficiency. You will get more opportunities than others, and your dreams may really come true in the near future.
Oracle 1Z0-804 Valid Exam Lab Questions - Omgzlook will never disappoint you.
If you are not satisfied with the function of PDF version which just only provide you the questions and answers, the APP version of 1Z0-804 Valid Exam Lab Questions exam cram materials can offer you more. APP version can not only simulate the real test scene but also point out your mistakes and notice you to practice many times. This version of Oracle 1Z0-804 Valid Exam Lab Questions exam cram materials is rather powerful. If you are willing, you can mark your performance every day and adjust your studying and preparation relatively. 1Z0-804 Valid Exam Lab Questions exam cram materials will try our best to satisfy your demand.
So you have nothing to worry about, only to study with our 1Z0-804 Valid Exam Lab Questions exam questions with full attention. And as we have been in this career for over ten years, our 1Z0-804 Valid Exam Lab Questions learning materials have became famous as a pass guarantee.
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.
Besides, we check the update about ISACA COBIT-Design-and-Implementation training pdf every day. EMC D-DS-OP-23 - To make your review more comfortable and effective, we made three versions as well as a series of favorable benefits for you. You will grasp the overall knowledge points of Microsoft AI-102 actual test with our pass guide and the accuracy of our Microsoft AI-102 exam answers will enable you spend less time and effort. If you compare our ISACA CISA training engine with the real exam, you will find that our study materials are highly similar to the real exam questions. Microsoft MD-102 - To enhance further your exam ability and strengthen your learning, you can benefit yourself getting practice Oracle real dumps.
Updated: May 28, 2022