We believe that 1Z0-804 Latest Test Topics Pdf study tool will make you fall in love with learning. Come and buy it now. Cease to struggle and you cease to live. 1Z0-804 Latest Test Topics Pdf exam prep look forward to meeting you. Our 1Z0-804 Latest Test Topics Pdf exam prep will give you a complete after-sales experience. Our ability of improvement is stronger than others.
Java and Middleware 1Z0-804 It is useless if you do not prepare well.
Java and Middleware 1Z0-804 Latest Test Topics Pdf - Java SE 7 Programmer II Exam So you must have a whole understanding of the test syllabus. And our 1Z0-804 Latest Exam Guide Files practice engine will be your best friend to help you succeed. Now, our 1Z0-804 Latest Exam Guide Files study questions are in short supply in the market.
When you try our part of Oracle certification 1Z0-804 Latest Test Topics Pdf exam practice questions and answers, you can make a choice to our Omgzlook. We will be 100% providing you convenience and guarantee. Remember that making you 100% pass Oracle certification 1Z0-804 Latest Test Topics Pdf exam is Omgzlook.
Oracle 1Z0-804 Latest Test Topics Pdf - I wish you good luck.
Omgzlook website is fully equipped with resources and the questions of Oracle 1Z0-804 Latest Test Topics Pdf exam, it also includes the Oracle 1Z0-804 Latest Test Topics Pdf exam practice test. Which can help candidates prepare for the exam and pass the exam. You can download the part of the trial exam questions and answers as a try. Omgzlook provide true and comprehensive exam questions and answers. With our exclusive online Oracle 1Z0-804 Latest Test Topics Pdf exam training materials, you'll easily through Oracle 1Z0-804 Latest Test Topics Pdf exam. Our site ensure 100% pass rate.
Oracle 1Z0-804 Latest Test Topics Pdf is a very important certification exam in the IT industry and passing Oracle certification 1Z0-804 Latest Test Topics Pdf exam is very difficult. But in order to let the job position to improve spending some money to choose a good training institution to help you pass the exam is worthful.
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.
Palo Alto Networks PCNSE - It is a professional exam materials that the IT elite team specially tailored for you. So IT professionals to enhance their knowledge through Oracle SAP C_S43_2022 exam certification. Oracle HP HP2-I73 certification exam will definitely lead you to a better career prospects. Omgzlook Oracle Salesforce Tableau-CRM-Einstein-Discovery-Consultant exam training materials bear with a large number of the exam questions you need, which is a good choice. If you are still troubled for the Oracle Adobe AD0-E207 certification exam, then select the Omgzlook's training materials please.
Updated: May 28, 2022