Are you still searching proper 1Z0-804 Vce Free exam study materials, or are you annoying of collecting these study materials? As the professional IT exam dumps provider, Omgzlook has offered the complete 1Z0-804 Vce Free exam materials for you. So you can save your time to have a full preparation of 1Z0-804 Vce Free exam. As a matter of fact, since the establishment, we have won wonderful feedback and ceaseless business, continuously working on developing our 1Z0-804 Vce Free test prep. We have been specializing 1Z0-804 Vce Free exam dumps many years and have a great deal of long-term old clients, and we would like to be a reliable cooperator on your learning path and in your further development. Your success is the success of our Omgzlook, and therefore, we will try our best to help you obtain 1Z0-804 Vce Free exam certification.
Java and Middleware 1Z0-804 It is so cool even to think about it.
And you are lucky to find us for we are the most popular vendor in this career and have a strong strength on providing the best 1Z0-804 - Java SE 7 Programmer II Exam Vce Free study materials. The innovatively crafted dumps will serve you the best; imparting you information in fewer number of questions and answers. Created on the exact pattern of the actual 1Z0-804 Test Simulator tests, Omgzlook’s dumps comprise questions and answers and provide all important 1Z0-804 Test Simulator information in easy to grasp and simplified content.
However, it is difficult for many people to get a 1Z0-804 Vce Free certification, but we are here to offer you help. We have helped tens of thousands of our customers achieve their certification with our excellent 1Z0-804 Vce Free exam braindumps. You can see the recruitment on the Internet, and the requirements for 1Z0-804 Vce Free certification are getting higher and higher.
Oracle 1Z0-804 Vce Free - In fact, our aim is the same with you.
For a long time, high quality is our 1Z0-804 Vce Free exam questions constantly attract students to participate in the use of important factors, only the guarantee of high quality, to provide students with a better teaching method, and at the same time the 1Z0-804 Vce Free practice quiz brings more outstanding teaching effect. Our high-quality 1Z0-804 Vce Free} learning guide help the students know how to choose suitable for their own learning method, our 1Z0-804 Vce Free study materials are a very good option.
As is known to us, there are best sale and after-sale service of the 1Z0-804 Vce Free certification training dumps all over the world in our company. Our company has employed a lot of excellent experts and professors in the field in the past years, in order to design the best and most suitable 1Z0-804 Vce Free latest questions for all customers.
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
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: 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.
You can effortlessly yield the printouts of Microsoft AI-900-CN exam study material as well, PDF files make it extremely simple for you to switch to any topics with a click. Splunk SPLK-1003 - The trick to the success is simply to be organized, efficient, and to stay positive about it. Moreover, doing these practice tests will impart you knowledge of the actual IIA IIA-CHAL-QISA exam format and develop your command over it. And you will get all you desire with our Databricks Databricks-Certified-Data-Engineer-Associate exam questions. Cisco 200-901 - Our Java SE 7 Programmer II Exam exam prep has taken up a large part of market.
Updated: May 28, 2022