A lot of candidates who choose to use the Omgzlook's product have passed IT certification exams for only one time. And from the feedback of them, helps from Omgzlook are proved to be effective. Omgzlook's expert team is a large team composed of senior IT professionals. Buying any product should choose a trustworthy company. Our Omgzlook can give you the promise of the highest pass rate of 1Z0-804 Reliable Real Test Question exam; we can give you a promise to try our 1Z0-804 Reliable Real Test Question software for free, and the promise of free updates within a year after purchase. Omgzlook is a website for Oracle certification 1Z0-804 Reliable Real Test Question exam to provide a short-term effective training.
Java and Middleware 1Z0-804 Success is has method.
What made our 1Z0-804 - Java SE 7 Programmer II Exam Reliable Real Test Question study guide so amazing? The answer that we only supply the latest and valid 1Z0-804 - Java SE 7 Programmer II Exam Reliable Real Test Question exam braindumps for our customers and first-class after-sales services come after the first-class 1Z0-804 - Java SE 7 Programmer II Exam Reliable Real Test Question learning engine. Yes, this is true. You get what you want is one of the manifestations of success.
We regard the customer as king so we put a high emphasis on the trust of every users, therefore our security system can protect you both in payment of 1Z0-804 Reliable Real Test Question guide braindumps and promise that your computer will not be infected during the process of payment on our 1Z0-804 Reliable Real Test Question study materials. Moreover, if you end up the cooperation between us,we have the responsibility to delete your personal information on 1Z0-804 Reliable Real Test Question exam prep. In a word, Wwe have data protection act for you to avoid information leakage!
Oracle 1Z0-804 Reliable Real Test Question - Everyone wants to succeed.
It is known to us that to pass the 1Z0-804 Reliable Real Test Question exam is very important for many people, especially who are looking for a good job and wants to have a 1Z0-804 Reliable Real Test Question certification. Because if you can get a certification, it will be help you a lot, for instance, it will help you get a more job and a better title in your company than before, and the 1Z0-804 Reliable Real Test Question certification will help you get a higher salary. We believe that our company has the ability to help you successfully pass your exam and get a 1Z0-804 Reliable Real Test Question certification by our 1Z0-804 Reliable Real Test Question exam torrent.
The contents of 1Z0-804 Reliable Real Test Question exam training material cover all the important points in the 1Z0-804 Reliable Real Test Question actual test, which can ensure the high hit rate. You can instantly download the Oracle 1Z0-804 Reliable Real Test Question practice dumps and concentrate on your study immediately.
1Z0-804 PDF DEMO:
QUESTION NO: 1
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: 2
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: 3
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: 4
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.
QUESTION NO: 5
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
However, since there was lots of competition in this industry, the smartest way to win the battle is improving the quality of our CWNP CWISA-102 learning materials, which we did a great job. The Microsoft AZ-104-KR vce torrent will be the best and valuable study tool for your preparation. Do you feel aimless and helpless when the PECB ISO-IEC-27001-Lead-Implementer exam is coming soon? If your answer is absolutely yes, then we would like to suggest you to try our PECB ISO-IEC-27001-Lead-Implementer training materials, which are high quality and efficiency test tools. You can download our complete high-quality Oracle Snowflake ARA-R01 dumps torrent as soon as possible if you like any time. We are well acknowledged for we have a fantastic advantage over other vendors - We offer you the simulation test with the Soft version of our PRINCE2 PRINCE2-Foundation exam engine: in order to let you be familiar with the environment of PRINCE2 PRINCE2-Foundation test as soon as possible.
Updated: May 28, 2022