There is no doubt that the function can help you pass the Java SE 7 Programmer II Exam exam. Our Java SE 7 Programmer II Exam exam questions provide with the software which has a variety of self-study and self-assessment functions to detect learning results. The statistical reporting function is provided to help students find weak points and deal with them. Our Java SE 7 Programmer II Exam test torrent boost 99% passing rate and high hit rate so you can have a high probability to pass the exam. Our 1Z0-804 Latest Exam Bootcamp study torrent is compiled by experts and approved by the experienced professionals and the questions and answers are chosen elaborately according to the syllabus and the latest development conditions in the theory and the practice and based on the real exam. Esoteric content will look so easily under the explanation of our experts.
Java and Middleware 1Z0-804 You can consult our staff online.
In the annual examination questions, our 1Z0-804 - Java SE 7 Programmer II Exam Latest Exam Bootcamp study questions have the corresponding rules to summarize, and can accurately predict this year's test hot spot and the proposition direction. They can greatly solve your problem-solving abilities. Actually our New 1Z0-804 Exam Tutorial study materials cover all those traits and they are your prerequisites for successful future.
Highlight a person's learning effect is not enough, because it is difficult to grasp the difficulty of testing, a person cannot be effective information feedback, in order to solve this problem, our 1Z0-804 Latest Exam Bootcamp real exam materials provide a powerful platform for users, allow users to exchange of experience. Here, the all users of our 1Z0-804 Latest Exam Bootcamp learning reference files can through own id to login to the platform, realize the exchange and sharing with other users, even on the platform and more users to become good friends, encourage each other, to deal with the difficulties encountered in the process of preparation each other. Our 1Z0-804 Latest Exam Bootcamp learning reference files not only provide a single learning environment for users, but also create a learning atmosphere like home, where you can learn and communicate easily.
Oracle 1Z0-804 Latest Exam Bootcamp - Your exam results will help you prove this!
With the most scientific content and professional materials 1Z0-804 Latest Exam Bootcamp preparation materials are indispensable helps for your success. Such a valuable acquisition priced reasonably of our 1Z0-804 Latest Exam Bootcamp study guide is offered before your eyes, you can feel assured to take good advantage of. And we give some discounts from time to time on our 1Z0-804 Latest Exam Bootcamp exam questions for promoting. If you come to visit our website more times, you will buy our 1Z0-804 Latest Exam Bootcamp practice engine at a more favorable price.
Our 1Z0-804 Latest Exam Bootcamp test torrent is carefully compiled by industry experts based on the examination questions and industry trends in the past few years. More importantly, we will promptly update our 1Z0-804 Latest Exam Bootcamp exam materials based on the changes of the times and then send it to you timely.
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
Materials trends are not always easy to forecast on our study guide, but they have predictable pattern for them by ten-year experience who often accurately predict points of knowledge occurring in next EMC D-ECS-DS-23 preparation materials. Our employees are diligent to deal with your need and willing to do their part on the Microsoft PL-400 study materials. And the content of our SAP C-S4CS-2408 study questions is easy to understand. Huawei H19-315 - High accuracy and high quality are the reasons why you should choose us. Our EMC D-XTR-MN-A-24 training materials are your excellent choices, especially helpful for those who want to pass the exam without bountiful time and eager to get through it successfully.
Updated: May 28, 2022