As long as you study with our 1Z0-804 Braindumps Files exam braindumps for 20 to 30 hours that we can claim that you will pass the exam for sure. We really need this efficiency. Perhaps you have doubts about this "shortest time." I believe that after you understand the professional configuration of 1Z0-804 Braindumps Files training questions, you will agree with what I said. What are you waiting for? Come and take 1Z0-804 Braindumps Files preparation questions home. Not only that our 1Z0-804 Braindumps Files exam questions can help you pass the exam easily and smoothly for sure and at the same time you will find that the 1Z0-804 Braindumps Files guide materials are valuable, but knowledge is priceless. But our 1Z0-804 Braindumps Files exam questions really did.
Java and Middleware 1Z0-804 Omgzlook will help you achieve your dream.
It is known to us that our 1Z0-804 - Java SE 7 Programmer II Exam Braindumps Files study materials have been keeping a high pass rate all the time. Do not spend too much time and money, as long as you have Omgzlook learning materials you will easily pass the exam. In order to help you more Omgzlook the Oracle Instant 1Z0-804 Access exam eliminate tension of the candidates on the Internet.
App online version-Be suitable to all kinds of equipment or digital devices. Be supportive to offline exercise on the condition that you practice it without mobile data. According to personal propensity and various understanding level of exam candidates, we have three versions of 1Z0-804 Braindumps Files practice materials for your reference.
Oracle 1Z0-804 Braindumps Files Exam is a milestone in your career.
Have you ever tried our IT exam certification software provided by our Omgzlook? If you have, you will use our 1Z0-804 Braindumps Files exam software with no doubt. If not, your usage of our dump this time will make you treat our Omgzlook as the necessary choice to prepare for other IT certification exams later. Our 1Z0-804 Braindumps Files exam software is developed by our IT elite through analyzing real 1Z0-804 Braindumps Files exam content for years, and there are three version including PDF version, online version and software version for you to choose.
Do you want to pass the Oracle 1Z0-804 Braindumps Files exam better and faster? Then please select the Omgzlook. It can help you achieve your dreams.
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.
We constantly updated the Microsoft SC-300 exam materials at the same time with the exam update. Will you seize Omgzlook to make you achievement? Omgzlook Oracle SAP C_THR82_2405 certification training materials will guarantee your success. HP HPE7-M02 - So our Omgzlook will provide a exam simulation for you to experience the real exam model before real exam. And with the aid of SAP C_THR94_2405 certification test, you can improve your skills and master some useful techniques in your job so that you can finish your work better and demonstrate your great ability before other people. Also you can ask us any questions about Microsoft DP-300-KR exam any time as you like.
Updated: May 28, 2022