The best part of 1Z0-804 Mock Test exam dumps are their relevance, comprehensiveness and precision. You need not to try any other source for1Z0-804 Mock Test exam preparation. The innovatively crafted dumps will serve you the best; imparting you information in fewer number of questions and answers. So for us, with one more certification, we will have one more bargaining chip in the future. However, it is difficult for many people to get a 1Z0-804 Mock Test certification, but we are here to offer you help. You will be much awarded with our 1Z0-804 Mock Test learning engine.
You final purpose is to get the 1Z0-804 Mock Test certificate.
Our high-quality 1Z0-804 - Java SE 7 Programmer II Exam Mock Test} learning guide help the students know how to choose suitable for their own learning method, our 1Z0-804 - Java SE 7 Programmer II Exam Mock Test study materials are a very good option. More importantly, it is evident to all that the Test 1Z0-804 Online training materials from our company have a high quality, and we can make sure that the quality of our products will be higher than other study materials in the market. If you want to pass the Test 1Z0-804 Online exam and get the related certification in the shortest time, choosing the Test 1Z0-804 Online training materials from our company will be in the best interests of all people.
All the preparation material reflects latest updates in 1Z0-804 Mock Test certification exam pattern. You may now download the 1Z0-804 Mock Test PDF documents in your smart devices and lug it along with you. You can effortlessly yield the printouts of 1Z0-804 Mock Test exam study material as well, PDF files make it extremely simple for you to switch to any topics with a click.
Our Oracle 1Z0-804 Mock Test exam materials can help you realize it.
Briefly speaking, our 1Z0-804 Mock Test training guide gives priority to the quality and service and will bring the clients the brand new experiences and comfortable feelings. For we have engaged in this career for years and we are always trying our best to develope every detail of our 1Z0-804 Mock Test study quiz. With our 1Z0-804 Mock Test exam questions, you will find the exam is just a piece of cake. What are you still hesitating for? Hurry to buy our 1Z0-804 Mock Test learning engine now!
Every page and every points of knowledge have been written from professional experts who are proficient in this line and are being accounting for this line over ten years. And they know every detail about our 1Z0-804 Mock Test learning prep and can help you pass the exam for sure.
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.
In order to promise the high quality of our Dell D-PWF-OE-A-00 exam questions, our company has outstanding technical staff, and has perfect service system after sale. We can claim that once you study with our EMC D-NWG-DS-00 exam questions for 20 to 30 hours, then you will be albe to pass the exam with confidence. If you decide to buy our ISACA CISM study questions, you can get the chance that you will pass your ISACA CISM exam and get the certification successfully in a short time. IBM C1000-180 - So, they are both efficient in practicing and downloading process. And you can click all three formats of our Microsoft MS-102 exam dumps to see.
Updated: May 28, 2022